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Author SHA1 Message Date
Xe Iaso d0b8d9abc8 fix(honeypot): remove DoS vector
Using the User-Agent as a filtering vector for the honeypot maze was a
decent idea, however in practice it can become a DoS vector by a
malicious client adding a lot of points to Google Chrome's User-Agent
string. In practice it also seems that the worst offenders use vanilla
Google Chrome User-Agent strings as well, meaning that this backfires
horribly.

Gotta crack a few eggs to make omlettes.

Closes: #1580
Signed-off-by: Xe Iaso <me@xeiaso.net>
2026-04-23 09:01:12 -04:00
32 changed files with 425 additions and 926 deletions
-2
View File
@@ -39,5 +39,3 @@ wenet
qwertiko
setuplistener
mba
xfu
xou
-3
View File
@@ -120,7 +120,6 @@ fahedouch
fastcgi
FCr
fcrdns
fcvg
fediverse
ffprobe
fhdr
@@ -239,7 +238,6 @@ mnt
Mojeek
mojeekbot
mozilla
mqvh
myclient
mymaster
mypass
@@ -389,7 +387,6 @@ vnd
VPS
Vultr
WAIFU
wcg
weblate
webmaster
webpage
-1
View File
@@ -27,7 +27,6 @@ jobs:
- palemoon/amd64
#- palemoon/i386
- robots_txt
- traefik
runs-on: ubuntu-latest
steps:
- name: Checkout code
+1 -1
View File
@@ -259,7 +259,7 @@ func main() {
}
lg.Info("loading policy file", "fname", *policyFname)
policy, err := libanubis.LoadPoliciesOrDefault(ctx, *policyFname, *challengeDifficulty, *slogLevel, strings.TrimSpace(*target) == "")
policy, err := libanubis.LoadPoliciesOrDefault(ctx, *policyFname, *challengeDifficulty, *slogLevel)
if err != nil {
log.Fatalf("can't parse policy file: %v", err)
}
-5
View File
@@ -13,7 +13,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
<!-- This changes the project to: -->
- Patch [GHSA-6wcg-mqvh-fcvg](https://github.com/TecharoHQ/anubis/security/advisories/GHSA-6wcg-mqvh-fcvg) by containing subrequest logic to Anubis instances in subrequest mode.
- Move metrics server configuration to [the policy file](./admin/policies.mdx#metrics-server).
- Expose [pprof endpoints](https://pkg.go.dev/net/http/pprof) on the metrics listener to enable profiling Anubis in production.
- fix: prevent nil pointer panic in challenge validation when threshold rules match during PassChallenge (#1463)
@@ -21,14 +20,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
- Fixed mixed tab/space indentation in Caddy documentation code block
- Improve error messages and fix broken REDIRECT_DOMAINS link in docs ([#1193](https://github.com/TecharoHQ/anubis/issues/1193))
- Add Bulgarian locale ([#1394](https://github.com/TecharoHQ/anubis/pull/1394))
- Fixed case-sensitivity mismatch in geoipchecker.go
- Fix CEL internal errors when iterating `headers`/`query` map wrappers by implementing map iterators for `HTTPHeaders` and `URLValues` ([#1465](https://github.com/TecharoHQ/anubis/pull/1465)).
- Enable [metrics serving via TLS](./admin/policies.mdx#tls), including [mutual TLS (mTLS)](./admin/policies.mdx#mtls).
- Enable [HTTP basic auth](./admin/policies.mdx#http-basic-authentication) for the metrics server.
- Fix a bug in the dataset poisoning maze that could allow denial of service [#1580](https://github.com/TecharoHQ/anubis/issues/1580).
- Add config option to add ASN to logs/metrics.
- Log weight when issuing challenge
- Fix `path_regex` and CEL `path` rules not matching when using Traefik `forwardAuth` middleware. Anubis now checks `X-Forwarded-Uri` (Traefik) in addition to `X-Original-URI` (nginx) when resolving the request path in subrequest mode ([#1628](https://github.com/TecharoHQ/anubis/issues/1628)).
## v1.25.0: Necron
-1
View File
@@ -411,7 +411,6 @@ Anubis exposes the following logging settings in the policy file:
| `level` | [log level](#log-levels) | `info` | The logging level threshold. Any logs that are at or above this threshold will be drained to the sink. Any other logs will be discarded. |
| `sink` | string | `stdio`, `file` | The sink where the logs drain to as they are being recorded in Anubis. |
| `parameters` | object | | Parameters for the given logging sink. This will vary based on the logging sink of choice. See below for more information. |
| `asn` | bool | `true`, `false` | Add ASN information to logs/metrics. (Requires a Thoth client configured) |
Anubis supports the following logging sinks:
+1 -1
View File
@@ -106,7 +106,7 @@ require (
github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
github.com/go-git/go-billy/v5 v5.6.2 // indirect
github.com/go-git/go-git/v5 v5.16.2 // indirect
github.com/go-jose/go-jose/v3 v3.0.5 // indirect
github.com/go-jose/go-jose/v3 v3.0.4 // indirect
github.com/go-logr/logr v1.4.3 // indirect
github.com/go-logr/stdr v1.2.2 // indirect
github.com/go-ole/go-ole v1.3.0 // indirect
+2 -2
View File
@@ -189,8 +189,8 @@ github.com/go-git/go-git-fixtures/v4 v4.3.2-0.20231010084843-55a94097c399 h1:eMj
github.com/go-git/go-git-fixtures/v4 v4.3.2-0.20231010084843-55a94097c399/go.mod h1:1OCfN199q1Jm3HZlxleg+Dw/mwps2Wbk9frAWm+4FII=
github.com/go-git/go-git/v5 v5.16.2 h1:fT6ZIOjE5iEnkzKyxTHK1W4HGAsPhqEqiSAssSO77hM=
github.com/go-git/go-git/v5 v5.16.2/go.mod h1:4Ge4alE/5gPs30F2H1esi2gPd69R0C39lolkucHBOp8=
github.com/go-jose/go-jose/v3 v3.0.5 h1:BLLJWbC4nMZOfuPVxoZIxeYsn6Nl2r1fITaJ78UQlVQ=
github.com/go-jose/go-jose/v3 v3.0.5/go.mod h1:5b+7YgP7ZICgJDBdfjZaIt+H/9L9T/YQrVfLAMboGkQ=
github.com/go-jose/go-jose/v3 v3.0.4 h1:Wp5HA7bLQcKnf6YYao/4kpRpVMp/yf6+pJKV8WFSaNY=
github.com/go-jose/go-jose/v3 v3.0.4/go.mod h1:5b+7YgP7ZICgJDBdfjZaIt+H/9L9T/YQrVfLAMboGkQ=
github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+1 -1
View File
@@ -595,7 +595,7 @@ func spawnAnubisWithOptions(t *testing.T, basePrefix string) string {
fmt.Fprintf(w, "<html><body><span id=anubis-test>%d</span></body></html>", time.Now().Unix())
})
policy, err := libanubis.LoadPoliciesOrDefault(t.Context(), "", anubis.DefaultDifficulty, "info", false)
policy, err := libanubis.LoadPoliciesOrDefault(t.Context(), "", anubis.DefaultDifficulty, "info")
if err != nil {
t.Fatal(err)
}
+15 -72
View File
@@ -11,7 +11,6 @@ import (
"net"
"net/http"
"net/url"
"strconv"
"strings"
"time"
@@ -33,7 +32,6 @@ import (
"github.com/TecharoHQ/anubis/lib/policy"
"github.com/TecharoHQ/anubis/lib/policy/checker"
"github.com/TecharoHQ/anubis/lib/store"
iptoasnv1 "github.com/TecharoHQ/thoth-proto/gen/techaro/thoth/iptoasn/v1"
// challenge implementations
_ "github.com/TecharoHQ/anubis/lib/challenge/metarefresh"
@@ -41,52 +39,31 @@ import (
_ "github.com/TecharoHQ/anubis/lib/challenge/proofofwork"
)
type contextKey int
const asnContextKey contextKey = iota
type asnInfo struct {
ASN string
Description string
}
func asnFromContext(ctx context.Context) (string, string) {
if v, ok := ctx.Value(asnContextKey).(asnInfo); ok {
return v.ASN, v.Description
}
return "", ""
}
var (
challengesIssued = promauto.NewCounterVec(prometheus.CounterOpts{
Name: "anubis_challenges_issued",
Help: "The total number of challenges issued",
}, []string{"method", "asn", "asn_description"})
}, []string{"method"})
challengesValidated = promauto.NewCounterVec(prometheus.CounterOpts{
Name: "anubis_challenges_validated",
Help: "The total number of challenges validated",
}, []string{"method", "asn", "asn_description"})
}, []string{"method"})
droneBLHits = promauto.NewCounterVec(prometheus.CounterOpts{
Name: "anubis_dronebl_hits",
Help: "The total number of hits from DroneBL",
}, []string{"status", "asn", "asn_description"})
}, []string{"status"})
failedValidations = promauto.NewCounterVec(prometheus.CounterOpts{
Name: "anubis_failed_validations",
Help: "The total number of failed validations",
}, []string{"method", "asn", "asn_description"})
}, []string{"method"})
requestsProxied = promauto.NewCounterVec(prometheus.CounterOpts{
Name: "anubis_proxied_requests_total",
Help: "Number of requests proxied through Anubis to upstream targets",
}, []string{"host", "asn", "asn_description"})
requestsByASN = promauto.NewCounterVec(prometheus.CounterOpts{
Name: "anubis_requests_by_asn_total",
Help: "Number of requests by ASN",
}, []string{"asn", "asn_description"})
}, []string{"host"})
)
type Server struct {
@@ -101,28 +78,6 @@ type Server struct {
hs512Secret []byte
}
func (s *Server) getRequestLogger(r *http.Request) (*slog.Logger, *http.Request) {
lg := internal.GetRequestLogger(s.logger, r)
if s.policy.LogASN && s.policy.ThothClient != nil {
ctx, cancel := context.WithTimeout(r.Context(), 500*time.Millisecond)
defer cancel()
ip := r.Header.Get("X-Real-Ip")
if info, err := s.policy.ThothClient.IPToASN.Lookup(ctx, &iptoasnv1.LookupRequest{IpAddress: ip}); err == nil && info.GetAnnounced() {
asn := strconv.FormatUint(uint64(info.GetAsNumber()), 10)
lg = lg.With("asn", info.GetAsNumber(), "asn_description", info.GetDescription())
requestsByASN.WithLabelValues(asn, info.GetDescription()).Inc()
r = r.WithContext(context.WithValue(r.Context(), asnContextKey, asnInfo{
ASN: asn,
Description: info.GetDescription(),
}))
}
}
return lg, r
}
func (s *Server) getTokenKeyfunc() jwt.Keyfunc {
// return ED25519 key if HS512 is not set
if len(s.hs512Secret) == 0 {
@@ -186,7 +141,7 @@ func (s *Server) issueChallenge(ctx context.Context, r *http.Request, lg *slog.L
return nil, err
}
lg.Info("new challenge issued", "challenge", id.String(), "weight", cr.Weight)
lg.Info("new challenge issued", "challenge", id.String())
return &chall, err
}
@@ -238,7 +193,7 @@ func (s *Server) maybeReverseProxyOrPage(w http.ResponseWriter, r *http.Request)
}
func (s *Server) maybeReverseProxy(w http.ResponseWriter, r *http.Request, httpStatusOnly bool) {
lg, r := s.getRequestLogger(r)
lg := internal.GetRequestLogger(s.logger, r)
if val, _ := s.store.Get(r.Context(), fmt.Sprintf("ogtags:allow:%s%s", r.Host, r.URL.String())); val != nil {
lg.Debug("serving opengraph tag asset")
@@ -263,10 +218,7 @@ func (s *Server) maybeReverseProxy(w http.ResponseWriter, r *http.Request, httpS
r.Header.Add("X-Anubis-Rule", cr.Name)
r.Header.Add("X-Anubis-Action", string(cr.Rule))
lg = lg.With("check_result", cr)
{
asn, asnDesc := asnFromContext(r.Context())
policy.Applications.WithLabelValues(cr.Name, string(cr.Rule), asn, asnDesc).Add(1)
}
policy.Applications.WithLabelValues(cr.Name, string(cr.Rule)).Add(1)
ip := r.Header.Get("X-Real-Ip")
@@ -396,8 +348,7 @@ func (s *Server) handleDNSBL(w http.ResponseWriter, r *http.Request, ip string,
lg.Error("can't look up ip in dnsbl", "err", err)
}
db.Set(r.Context(), ip, resp, 24*time.Hour)
asn, asnDesc := asnFromContext(r.Context())
droneBLHits.WithLabelValues(resp.String(), asn, asnDesc).Inc()
droneBLHits.WithLabelValues(resp.String()).Inc()
}
if resp != dnsbl.AllGood {
@@ -415,7 +366,7 @@ func (s *Server) handleDNSBL(w http.ResponseWriter, r *http.Request, ip string,
}
func (s *Server) MakeChallenge(w http.ResponseWriter, r *http.Request) {
lg, r := s.getRequestLogger(r)
lg := internal.GetRequestLogger(s.logger, r)
localizer := localization.GetLocalizer(r)
redir := r.FormValue("redir")
@@ -484,14 +435,11 @@ func (s *Server) MakeChallenge(w http.ResponseWriter, r *http.Request) {
return
}
lg.Debug("made challenge", "challenge", chall, "rules", rule.Challenge, "cr", cr)
{
asn, asnDesc := asnFromContext(r.Context())
challengesIssued.WithLabelValues("api", asn, asnDesc).Inc()
}
challengesIssued.WithLabelValues("api").Inc()
}
func (s *Server) PassChallenge(w http.ResponseWriter, r *http.Request) {
lg, r := s.getRequestLogger(r)
lg := internal.GetRequestLogger(s.logger, r)
localizer := localization.GetLocalizer(r)
redir := r.FormValue("redir")
@@ -582,8 +530,7 @@ func (s *Server) PassChallenge(w http.ResponseWriter, r *http.Request) {
}
if err := impl.Validate(r, lg, in); err != nil {
asn, asnDesc := asnFromContext(r.Context())
failedValidations.WithLabelValues(rule.Challenge.Algorithm, asn, asnDesc).Inc()
failedValidations.WithLabelValues(rule.Challenge.Algorithm).Inc()
var cerr *challenge.Error
s.ClearCookie(w, CookieOpts{Path: cookiePath, Host: r.Host})
lg.Debug("challenge validate call failed", "err", err)
@@ -643,10 +590,7 @@ func (s *Server) PassChallenge(w http.ResponseWriter, r *http.Request) {
lg.Debug("can't update information about challenge", "err", err)
}
{
asn, asnDesc := asnFromContext(r.Context())
challengesValidated.WithLabelValues(rule.Challenge.Algorithm, asn, asnDesc).Inc()
}
challengesValidated.WithLabelValues(rule.Challenge.Algorithm).Inc()
lg.Debug("challenge passed, redirecting to app")
http.Redirect(w, r, redir, http.StatusFound)
}
@@ -685,8 +629,7 @@ func (s *Server) check(r *http.Request, lg *slog.Logger) (policy.CheckResult, *p
return cr("bot/"+b.Name, b.Action, weight), &b, nil
case config.RuleWeigh:
lg.Debug("adjusting weight", "name", b.Name, "delta", b.Weight.Adjust)
asn, asnDesc := asnFromContext(r.Context())
policy.Applications.WithLabelValues("bot/"+b.Name, "WEIGH", asn, asnDesc).Add(1)
policy.Applications.WithLabelValues("bot/"+b.Name, "WEIGH").Add(1)
weight += b.Weight.Adjust
}
}
+2 -2
View File
@@ -58,7 +58,7 @@ func loadPolicies(t *testing.T, fname string, difficulty int) *policy.ParsedConf
t.Logf("loading policy file: %s", fname)
anubisPolicy, err := LoadPoliciesOrDefault(ctx, fname, difficulty, "info", false)
anubisPolicy, err := LoadPoliciesOrDefault(ctx, fname, difficulty, "info")
if err != nil {
t.Fatal(err)
}
@@ -250,7 +250,7 @@ func TestLoadPolicies(t *testing.T) {
}
defer fin.Close()
if _, err := policy.ParseConfig(t.Context(), fin, fname, 4, "info", false); err != nil {
if _, err := policy.ParseConfig(t.Context(), fin, fname, 4, "info"); err != nil {
t.Fatal(err)
}
})
+2 -2
View File
@@ -55,7 +55,7 @@ type Options struct {
DifficultyInJWT bool
}
func LoadPoliciesOrDefault(ctx context.Context, fname string, defaultDifficulty int, logLevel string, subrequestMode bool) (*policy.ParsedConfig, error) {
func LoadPoliciesOrDefault(ctx context.Context, fname string, defaultDifficulty int, logLevel string) (*policy.ParsedConfig, error) {
var fin io.ReadCloser
var err error
@@ -79,7 +79,7 @@ func LoadPoliciesOrDefault(ctx context.Context, fname string, defaultDifficulty
}
}(fin)
anubisPolicy, err := policy.ParseConfig(ctx, fin, fname, defaultDifficulty, logLevel, subrequestMode)
anubisPolicy, err := policy.ParseConfig(ctx, fin, fname, defaultDifficulty, logLevel)
if err != nil {
return nil, fmt.Errorf("can't parse policy file %s: %w", fname, err)
}
-1
View File
@@ -17,7 +17,6 @@ type Logging struct {
Sink string `json:"sink"` // Logging sink, either "stdio" or "file"
Level *slog.Level `json:"level"` // Log level, if set supersedes the level in flags
Parameters *LoggingFileConfig `json:"parameters"` // Logging parameters, to be dynamic in the future
LogASN bool `json:"asn" yaml:"asn"`
}
const (
+4 -4
View File
@@ -12,7 +12,7 @@ import (
)
func TestInvalidChallengeMethod(t *testing.T) {
if _, err := LoadPoliciesOrDefault(t.Context(), "testdata/invalid-challenge-method.yaml", 4, "info", false); !errors.Is(err, policy.ErrChallengeRuleHasWrongAlgorithm) {
if _, err := LoadPoliciesOrDefault(t.Context(), "testdata/invalid-challenge-method.yaml", 4, "info"); !errors.Is(err, policy.ErrChallengeRuleHasWrongAlgorithm) {
t.Fatalf("wanted error %v but got %v", policy.ErrChallengeRuleHasWrongAlgorithm, err)
}
}
@@ -25,7 +25,7 @@ func TestBadConfigs(t *testing.T) {
for _, st := range finfos {
t.Run(st.Name(), func(t *testing.T) {
if _, err := LoadPoliciesOrDefault(t.Context(), filepath.Join("config", "testdata", "bad", st.Name()), anubis.DefaultDifficulty, "info", false); err == nil {
if _, err := LoadPoliciesOrDefault(t.Context(), filepath.Join("config", "testdata", "bad", st.Name()), anubis.DefaultDifficulty, "info"); err == nil {
t.Fatal(err)
} else {
t.Log(err)
@@ -44,13 +44,13 @@ func TestGoodConfigs(t *testing.T) {
t.Run(st.Name(), func(t *testing.T) {
t.Run("with-thoth", func(t *testing.T) {
ctx := thothmock.WithMockThoth(t)
if _, err := LoadPoliciesOrDefault(ctx, filepath.Join("config", "testdata", "good", st.Name()), anubis.DefaultDifficulty, "info", false); err != nil {
if _, err := LoadPoliciesOrDefault(ctx, filepath.Join("config", "testdata", "good", st.Name()), anubis.DefaultDifficulty, "info"); err != nil {
t.Fatal(err)
}
})
t.Run("without-thoth", func(t *testing.T) {
if _, err := LoadPoliciesOrDefault(t.Context(), filepath.Join("config", "testdata", "good", st.Name()), anubis.DefaultDifficulty, "info", false); err != nil {
if _, err := LoadPoliciesOrDefault(t.Context(), filepath.Join("config", "testdata", "good", st.Name()), anubis.DefaultDifficulty, "info"); err != nil {
t.Fatal(err)
}
})
+7 -11
View File
@@ -207,7 +207,7 @@ func (s *Server) RenderIndex(w http.ResponseWriter, r *http.Request, cr policy.C
return
}
lg, r := s.getRequestLogger(r)
lg := internal.GetRequestLogger(s.logger, r)
if !strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") && randomChance(64) {
lg.Error("client was given a challenge but does not in fact support gzip compression")
@@ -215,10 +215,7 @@ func (s *Server) RenderIndex(w http.ResponseWriter, r *http.Request, cr policy.C
return
}
{
asn, asnDesc := asnFromContext(r.Context())
challengesIssued.WithLabelValues("embedded", asn, asnDesc).Add(1)
}
challengesIssued.WithLabelValues("embedded").Add(1)
chall, err := s.issueChallenge(r.Context(), r, lg, cr, rule)
if err != nil {
lg.Error("can't get challenge", "err", err)
@@ -309,14 +306,14 @@ func (s *Server) constructRedirectURL(r *http.Request) (string, error) {
case "http", "https":
// allowed
default:
lg, _ := s.getRequestLogger(r)
lg := internal.GetRequestLogger(s.logger, r)
lg.Warn("invalid protocol in X-Forwarded-Proto", "proto", proto)
return "", errors.New(localizer.T("invalid_redirect"))
}
// Check if host is allowed in RedirectDomains (supports '*' via glob)
if len(s.opts.RedirectDomains) > 0 && !matchRedirectDomain(s.opts.RedirectDomains, host) {
lg, _ := s.getRequestLogger(r)
lg := internal.GetRequestLogger(s.logger, r)
lg.Debug("domain not allowed", "domain", host)
return "", errors.New(localizer.T("redirect_domain_not_allowed"))
}
@@ -418,7 +415,7 @@ func (s *Server) ServeHTTPNext(w http.ResponseWriter, r *http.Request) {
case "", "http", "https":
// allowed: empty scheme means relative URL
default:
lg, _ := s.getRequestLogger(r)
lg := internal.GetRequestLogger(s.logger, r)
lg.Warn("XSS attempt blocked, invalid redirect scheme", "scheme", urlParsed.Scheme, "redir", redir)
s.respondWithStatus(w, r, localizer.T("invalid_redirect"), "", http.StatusBadRequest)
return
@@ -430,7 +427,7 @@ func (s *Server) ServeHTTPNext(w http.ResponseWriter, r *http.Request) {
hostMismatch := r.URL.Host != "" && urlParsed.Host != "" && urlParsed.Host != r.URL.Host
if hostNotAllowed || hostMismatch {
lg, _ := s.getRequestLogger(r)
lg := internal.GetRequestLogger(s.logger, r)
lg.Debug("domain not allowed", "domain", urlParsed.Host)
s.respondWithStatus(w, r, localizer.T("redirect_domain_not_allowed"), makeCode(err), http.StatusBadRequest)
return
@@ -445,8 +442,7 @@ func (s *Server) ServeHTTPNext(w http.ResponseWriter, r *http.Request) {
web.Base(localizer.T("you_are_not_a_bot"), web.StaticHappy(localizer), s.policy.Impressum, localizer),
).ServeHTTP(w, r)
} else {
asn, asnDesc := asnFromContext(r.Context())
requestsProxied.WithLabelValues(r.Host, asn, asnDesc).Inc()
requestsProxied.WithLabelValues(r.Host).Inc()
r = s.stripBasePrefixFromRequest(r)
s.next.ServeHTTP(w, r)
}
+1 -1
View File
@@ -64,7 +64,7 @@ func (s *Server) run(ctx context.Context, lg *slog.Logger) error {
ErrorLog: internal.GetFilteredHTTPLogger(),
}
ln, metricsURL, err := internal.SetupListener(s.Config.Network, s.Config.Bind, s.Config.SocketMode)
ln, metricsURL, err := internal.SetupListener(s.Config.Bind, s.Config.Network, s.Config.SocketMode)
if err != nil {
return fmt.Errorf("can't setup listener: %w", err)
}
+6 -17
View File
@@ -13,12 +13,11 @@ import (
)
type CELChecker struct {
program cel.Program
src string
subRequestMode bool
program cel.Program
src string
}
func NewCELChecker(cfg *config.ExpressionOrList, dnsObj *dns.Dns, subRequestMode bool) (*CELChecker, error) {
func NewCELChecker(cfg *config.ExpressionOrList, dnsObj *dns.Dns) (*CELChecker, error) {
env, err := expressions.BotEnvironment(dnsObj)
if err != nil {
return nil, err
@@ -30,9 +29,8 @@ func NewCELChecker(cfg *config.ExpressionOrList, dnsObj *dns.Dns, subRequestMode
}
return &CELChecker{
src: cfg.String(),
program: program,
subRequestMode: subRequestMode,
src: cfg.String(),
program: program,
}, nil
}
@@ -41,7 +39,7 @@ func (cc *CELChecker) Hash() string {
}
func (cc *CELChecker) Check(r *http.Request) (bool, error) {
result, _, err := cc.program.ContextEval(r.Context(), &CELRequest{r, cc.subRequestMode})
result, _, err := cc.program.ContextEval(r.Context(), &CELRequest{r})
if err != nil {
return false, err
@@ -56,7 +54,6 @@ func (cc *CELChecker) Check(r *http.Request) (bool, error) {
type CELRequest struct {
*http.Request
subRequestMode bool
}
func (cr *CELRequest) Parent() cel.Activation { return nil }
@@ -74,14 +71,6 @@ func (cr *CELRequest) ResolveName(name string) (any, bool) {
case "userAgent":
return cr.UserAgent(), true
case "path":
if cr.subRequestMode {
if xou := cr.Header.Get("X-Original-URI"); xou != "" {
return xou, true
}
if xfu := cr.Header.Get("X-Forwarded-Uri"); xfu != "" {
return xfu, true
}
}
return cr.URL.Path, true
case "query":
return expressions.URLValues{Values: cr.URL.Query()}, true
+1 -75
View File
@@ -23,7 +23,7 @@ func TestCELChecker_MapIterationWrappers(t *testing.T) {
Expression: `headers.exists(k, k == "Accept") && query.exists(k, k == "format")`,
}
checker, err := NewCELChecker(cfg, newTestDNS(t), false)
checker, err := NewCELChecker(cfg, newTestDNS(t))
if err != nil {
t.Fatalf("creating CEL checker failed: %v", err)
}
@@ -42,77 +42,3 @@ func TestCELChecker_MapIterationWrappers(t *testing.T) {
t.Fatal("expected expression to evaluate true")
}
}
func TestCELChecker_PathWithForwardedUri(t *testing.T) {
tests := []struct {
name string
expression string
xForwardedUri string
urlPath string
subRequestMode bool
want bool
}{
{
name: "path matches X-Forwarded-Uri in subrequest mode",
expression: `path.startsWith("/admin")`,
xForwardedUri: "/admin/secret",
urlPath: "/.within.website/x/cmd/anubis/api/check",
subRequestMode: true,
want: true,
},
{
name: "path with query string",
expression: `path.startsWith("/api/secret")`,
xForwardedUri: "/api/secret?token=abc",
urlPath: "/.within.website/x/cmd/anubis/api/check",
subRequestMode: true,
want: true,
},
{
name: "path falls back to url path when no header",
expression: `path == "/public/page"`,
urlPath: "/public/page",
subRequestMode: true,
want: true,
},
{
name: "non-subrequest mode ignores X-Forwarded-Uri",
expression: `path.startsWith("/admin")`,
xForwardedUri: "/admin/secret",
urlPath: "/public/page",
subRequestMode: false,
want: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := &config.ExpressionOrList{
Expression: tt.expression,
}
checker, err := NewCELChecker(cfg, newTestDNS(t), tt.subRequestMode)
if err != nil {
t.Fatalf("NewCELChecker() error: %v", err)
}
req, err := http.NewRequest(http.MethodGet, "http://example.com"+tt.urlPath, nil)
if err != nil {
t.Fatalf("http.NewRequest: %v", err)
}
if tt.xForwardedUri != "" {
req.Header.Set("X-Forwarded-Uri", tt.xForwardedUri)
}
got, err := checker.Check(req)
if err != nil {
t.Fatalf("Check() error: %v", err)
}
if got != tt.want {
t.Errorf("Check() = %v, want %v (subRequestMode=%v, urlPath=%q, X-Forwarded-Uri=%q)",
got, tt.want, tt.subRequestMode, tt.urlPath, tt.xForwardedUri)
}
})
}
}
+8 -14
View File
@@ -94,29 +94,23 @@ func (hmc *HeaderMatchesChecker) Hash() string {
}
type PathChecker struct {
regexp *regexp.Regexp
hash string
subRequestMode bool
regexp *regexp.Regexp
hash string
}
func NewPathChecker(rexStr string, subrequestMode bool) (checker.Impl, error) {
func NewPathChecker(rexStr string) (checker.Impl, error) {
rex, err := regexp.Compile(strings.TrimSpace(rexStr))
if err != nil {
return nil, fmt.Errorf("%w: regex %s failed parse: %w", ErrMisconfiguration, rexStr, err)
}
return &PathChecker{rex, internal.FastHash(rexStr), subrequestMode}, nil
return &PathChecker{rex, internal.FastHash(rexStr)}, nil
}
func (pc *PathChecker) Check(r *http.Request) (bool, error) {
if pc.subRequestMode {
originalUrl := r.Header.Get("X-Original-URI")
if originalUrl == "" {
originalUrl = r.Header.Get("X-Forwarded-Uri")
}
if originalUrl != "" {
if pc.regexp.MatchString(originalUrl) {
return true, nil
}
originalUrl := r.Header.Get("X-Original-URI")
if originalUrl != "" {
if pc.regexp.MatchString(originalUrl) {
return true, nil
}
}
+2 -223
View File
@@ -272,8 +272,8 @@ func TestPathChecker_XOriginalURI(t *testing.T) {
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// Create the PathChecker in subrequest mode so X-Original-URI is honored.
pc, err := NewPathChecker(tt.regex, true)
// Create the PathChecker
pc, err := NewPathChecker(tt.regex)
if err != nil {
if !tt.expectError {
t.Fatalf("NewPathChecker() unexpected error: %v", err)
@@ -305,224 +305,3 @@ func TestPathChecker_XOriginalURI(t *testing.T) {
})
}
}
// TestPathChecker_GHSA_6wcg_mqvh_fcvg is a regression test for
// https://github.com/TecharoHQ/anubis/security/advisories/GHSA-6wcg-mqvh-fcvg.
//
// PR https://github.com/TecharoHQ/anubis/pull/1015 added the ability for
// reverse proxies using Anubis in subrequest auth mode to look at the path
// of a request as there are many rules in the wild that rely on checking
// the path. This is how access to things like robots.txt or anything in the
// .well-known directory is unaffected by Anubis.
//
// However this logic was also enabled for non-subrequest deployments of Anubis,
// meaning that a specially crafted request could include a /.well-known/
// path in it and then get around Anubis with little effort.
//
// This fix gates the logic behind a new plumbed variable named subrequestMode
// that only fires when Anubis is running in subrequest auth mode. This
// properly contains that workaround so that the logic does not fire in
// most deployments.
func TestPathChecker_GHSA_6wcg_mqvh_fcvg(t *testing.T) {
tests := []struct {
name string
regex string
urlPath string
xOriginalURI string
subRequestMode bool
want bool
}{
{
name: "default mode ignores spoofed X-Original-URI when real path matches",
regex: "^/admin/.*",
urlPath: "/admin/secret",
xOriginalURI: "/public/index",
subRequestMode: false,
want: true,
},
{
name: "default mode ignores spoofed X-Original-URI when real path does not match",
regex: "^/admin/.*",
urlPath: "/public/index",
xOriginalURI: "/admin/secret",
subRequestMode: false,
want: false,
},
{
name: "default mode without X-Original-URI matches real path",
regex: "^/admin/.*",
urlPath: "/admin/dashboard",
xOriginalURI: "",
subRequestMode: false,
want: true,
},
{
name: "subrequest mode honors X-Original-URI",
regex: "^/admin/.*",
urlPath: "/auth",
xOriginalURI: "/admin/secret",
subRequestMode: true,
want: true,
},
{
name: "subrequest mode falls back to URL.Path when X-Original-URI does not match",
regex: "^/admin/.*",
urlPath: "/admin/dashboard",
xOriginalURI: "/public/index",
subRequestMode: true,
want: true,
},
{
name: "subrequest mode with empty X-Original-URI uses URL.Path",
regex: "^/admin/.*",
urlPath: "/admin/dashboard",
xOriginalURI: "",
subRequestMode: true,
want: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
pc, err := NewPathChecker(tt.regex, tt.subRequestMode)
if err != nil {
t.Fatalf("NewPathChecker(%q, %v) returned error: %v", tt.regex, tt.subRequestMode, err)
}
req, err := http.NewRequest(http.MethodGet, "http://example.com"+tt.urlPath, nil)
if err != nil {
t.Fatalf("http.NewRequest: %v", err)
}
if tt.xOriginalURI != "" {
req.Header.Set("X-Original-URI", tt.xOriginalURI)
}
got, err := pc.Check(req)
if err != nil {
t.Fatalf("Check() unexpected error: %v", err)
}
if got != tt.want {
t.Errorf("Check() = %v, want %v (subRequestMode=%v, urlPath=%q, X-Original-URI=%q)",
got, tt.want, tt.subRequestMode, tt.urlPath, tt.xOriginalURI)
}
})
}
}
func TestPathChecker_XForwardedUri(t *testing.T) {
tests := []struct {
name string
regex string
xForwardedUri string
xOriginalURI string
urlPath string
subRequestMode bool
want bool
}{
{
name: "X-Forwarded-Uri matches regex in subrequest mode",
regex: "^/admin/.*",
xForwardedUri: "/admin/users",
urlPath: "/.within.website/x/cmd/anubis/api/check",
subRequestMode: true,
want: true,
},
{
name: "X-Forwarded-Uri with query string",
regex: "^/admin/.*",
xForwardedUri: "/admin/users?page=1",
urlPath: "/.within.website/x/cmd/anubis/api/check",
subRequestMode: true,
want: true,
},
{
name: "X-Original-URI takes priority over X-Forwarded-Uri",
regex: "^/admin/.*",
xForwardedUri: "/public/page",
xOriginalURI: "/admin/users",
urlPath: "/.within.website/x/cmd/anubis/api/check",
subRequestMode: true,
want: true,
},
{
name: "falls back to X-Forwarded-Uri when no X-Original-URI",
regex: "^/admin/.*",
xForwardedUri: "/admin/dashboard",
urlPath: "/.within.website/x/cmd/anubis/api/check",
subRequestMode: true,
want: true,
},
{
name: "neither header matches, url path matches",
regex: "^/public/.*",
xForwardedUri: "/admin/users",
urlPath: "/public/page",
subRequestMode: true,
want: true,
},
{
name: "nothing matches",
regex: "^/admin/.*",
xForwardedUri: "/public/page",
urlPath: "/.within.website/x/cmd/anubis/api/check",
subRequestMode: true,
want: false,
},
{
name: "non-subrequest mode ignores X-Forwarded-Uri",
regex: "^/admin/.*",
xForwardedUri: "/admin/users",
urlPath: "/public/page",
subRequestMode: false,
want: false,
},
{
name: "non-subrequest mode uses url path",
regex: "^/admin/.*",
xForwardedUri: "/public/page",
urlPath: "/admin/secret",
subRequestMode: false,
want: true,
},
{
name: "empty X-Forwarded-Uri falls back to url path",
regex: "^/check$",
urlPath: "/check",
subRequestMode: true,
want: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
pc, err := NewPathChecker(tt.regex, tt.subRequestMode)
if err != nil {
t.Fatalf("NewPathChecker(%q, %v) returned error: %v", tt.regex, tt.subRequestMode, err)
}
req, err := http.NewRequest(http.MethodGet, "http://example.com"+tt.urlPath, nil)
if err != nil {
t.Fatalf("http.NewRequest: %v", err)
}
if tt.xForwardedUri != "" {
req.Header.Set("X-Forwarded-Uri", tt.xForwardedUri)
}
if tt.xOriginalURI != "" {
req.Header.Set("X-Original-URI", tt.xOriginalURI)
}
got, err := pc.Check(req)
if err != nil {
t.Fatalf("Check() unexpected error: %v", err)
}
if got != tt.want {
t.Errorf("Check() = %v, want %v (subRequestMode=%v, urlPath=%q, X-Forwarded-Uri=%q, X-Original-URI=%q)",
got, tt.want, tt.subRequestMode, tt.urlPath, tt.xForwardedUri, tt.xOriginalURI)
}
})
}
}
+4 -14
View File
@@ -27,7 +27,7 @@ var (
Applications = promauto.NewCounterVec(prometheus.CounterOpts{
Name: "anubis_policy_results",
Help: "The results of each policy rule",
}, []string{"rule", "action", "asn", "asn_description"})
}, []string{"rule", "action"})
ErrChallengeRuleHasWrongAlgorithm = errors.New("config.Bot.ChallengeRules: algorithm is invalid")
warnedAboutThresholds = &atomic.Bool{}
@@ -47,8 +47,6 @@ type ParsedConfig struct {
Dns *dns.Dns
Logger *slog.Logger
Metrics *config.Metrics
ThothClient *thoth.Client
LogASN bool
}
func newParsedConfig(orig *config.Config) *ParsedConfig {
@@ -60,7 +58,7 @@ func newParsedConfig(orig *config.Config) *ParsedConfig {
}
}
func ParseConfig(ctx context.Context, fin io.Reader, fname string, defaultDifficulty int, logLevel string, subrequestMode bool) (*ParsedConfig, error) {
func ParseConfig(ctx context.Context, fin io.Reader, fname string, defaultDifficulty int, logLevel string) (*ParsedConfig, error) {
c, err := config.Load(fin, fname)
if err != nil {
return nil, err
@@ -72,10 +70,6 @@ func ParseConfig(ctx context.Context, fin io.Reader, fname string, defaultDiffic
result := newParsedConfig(c)
result.DefaultDifficulty = defaultDifficulty
result.LogASN = c.Logging.LogASN
if hasThothClient {
result.ThothClient = tc
}
if c.Logging.Level != nil {
logLevel = c.Logging.Level.String()
@@ -100,10 +94,6 @@ func ParseConfig(ctx context.Context, fin io.Reader, fname string, defaultDiffic
lg := result.Logger.With("at", "config-validate")
if result.LogASN && !hasThothClient {
lg.Warn("logging.asn is enabled but no Thoth client is configured; ASN logging and metrics will be skipped. Please read https://anubis.techaro.lol/docs/admin/thoth for more information")
}
stFac, ok := store.Get(c.Store.Backend)
switch ok {
case true:
@@ -152,7 +142,7 @@ func ParseConfig(ctx context.Context, fin io.Reader, fname string, defaultDiffic
}
if b.PathRegex != nil {
c, err := NewPathChecker(*b.PathRegex, subrequestMode)
c, err := NewPathChecker(*b.PathRegex)
if err != nil {
validationErrs = append(validationErrs, fmt.Errorf("while processing rule %s path regex: %w", b.Name, err))
} else {
@@ -170,7 +160,7 @@ func ParseConfig(ctx context.Context, fin io.Reader, fname string, defaultDiffic
}
if b.Expression != nil {
c, err := NewCELChecker(b.Expression, result.Dns, subrequestMode)
c, err := NewCELChecker(b.Expression, result.Dns)
if err != nil {
validationErrs = append(validationErrs, fmt.Errorf("while processing rule %s expressions: %w", b.Name, err))
} else {
+4 -4
View File
@@ -19,7 +19,7 @@ func TestDefaultPolicyMustParse(t *testing.T) {
}
defer fin.Close()
if _, err := ParseConfig(ctx, fin, "botPolicies.yaml", anubis.DefaultDifficulty, "info", false); err != nil {
if _, err := ParseConfig(ctx, fin, "botPolicies.yaml", anubis.DefaultDifficulty, "info"); err != nil {
t.Fatalf("can't parse config: %v", err)
}
}
@@ -41,7 +41,7 @@ func TestGoodConfigs(t *testing.T) {
defer fin.Close()
ctx := thothmock.WithMockThoth(t)
if _, err := ParseConfig(ctx, fin, fin.Name(), anubis.DefaultDifficulty, "info", false); err != nil {
if _, err := ParseConfig(ctx, fin, fin.Name(), anubis.DefaultDifficulty, "info"); err != nil {
t.Fatal(err)
}
})
@@ -53,7 +53,7 @@ func TestGoodConfigs(t *testing.T) {
}
defer fin.Close()
if _, err := ParseConfig(t.Context(), fin, fin.Name(), anubis.DefaultDifficulty, "info", false); err != nil {
if _, err := ParseConfig(t.Context(), fin, fin.Name(), anubis.DefaultDifficulty, "info"); err != nil {
t.Fatal(err)
}
})
@@ -77,7 +77,7 @@ func TestBadConfigs(t *testing.T) {
}
defer fin.Close()
if _, err := ParseConfig(ctx, fin, fin.Name(), anubis.DefaultDifficulty, "info", false); err == nil {
if _, err := ParseConfig(ctx, fin, fin.Name(), anubis.DefaultDifficulty, "info"); err == nil {
t.Fatal(err)
} else {
t.Log(err)
+1 -1
View File
@@ -18,7 +18,7 @@ func (c *Client) GeoIPCheckerFor(countries []string) checker.Impl {
var sb strings.Builder
fmt.Fprintln(&sb, "GeoIPChecker")
for _, cc := range countries {
countryMap[strings.ToLower(cc)] = struct{}{}
countryMap[cc] = struct{}{}
fmt.Fprintln(&sb, cc)
}
+357 -324
View File
File diff suppressed because it is too large Load Diff
+6 -6
View File
@@ -20,11 +20,11 @@
"author": "",
"license": "ISC",
"devDependencies": {
"@commitlint/cli": "^20.5.3",
"@commitlint/config-conventional": "^20.5.3",
"baseline-browser-mapping": "^2.10.27",
"cssnano": "^7.1.8",
"cssnano-preset-advanced": "^7.0.16",
"@commitlint/cli": "^20.5.0",
"@commitlint/config-conventional": "^20.5.0",
"baseline-browser-mapping": "^2.10.15",
"cssnano": "^7.1.4",
"cssnano-preset-advanced": "^7.0.12",
"esbuild": "^0.28.0",
"husky": "^9.1.7",
"playwright": "^1.52.0",
@@ -32,7 +32,7 @@
"postcss-import": "^16.1.1",
"postcss-import-url": "^7.2.0",
"postcss-url": "^10.1.3",
"prettier": "^3.8.3"
"prettier": "^3.8.1"
},
"dependencies": {
"@aws-crypto/sha256-js": "^5.2.0",
-16
View File
@@ -1,16 +0,0 @@
bots:
- name: block-admin-via-regex
path_regex: ^/admin(/.*)?$
action: DENY
- name: block-secret-via-cel
expression:
all:
- 'path.startsWith("/api/secret")'
action: DENY
- import: (data)/meta/default-config.yaml
status_codes:
CHALLENGE: 200
DENY: 403
-27
View File
@@ -1,27 +0,0 @@
services:
traefik:
image: traefik:v3.3
restart: always
ports:
- 8080:80
volumes:
- ./traefik.yml:/etc/traefik/traefik.yml:ro
- ./http.yaml:/config/http.yaml:ro
anubis:
image: ko.local/anubis
restart: always
environment:
BIND: ":8080"
TARGET: " "
POLICY_FNAME: /etc/techaro/anubis.yaml
PUBLIC_URL: http://localhost:8080/.within.website/x/cmd/anubis
COOKIE_DOMAIN: localhost
USE_REMOTE_ADDRESS: "true"
volumes:
- ./anubis.yaml:/etc/techaro/anubis.yaml
backend:
image: ghcr.io/xe/x/httpdebug
pull_policy: always
restart: always
-30
View File
@@ -1,30 +0,0 @@
http:
middlewares:
anubis:
forwardAuth:
address: http://anubis:8080/.within.website/x/cmd/anubis/api/check
trustForwardHeader: true
routers:
anubis-assets:
rule: Host(`localhost`) && PathPrefix(`/.within.website/x/cmd/anubis`)
entryPoints:
- web
service: anubis
backend:
rule: Host(`localhost`)
entryPoints:
- web
service: backend
middlewares:
- anubis
services:
anubis:
loadBalancer:
servers:
- url: http://anubis:8080
backend:
loadBalancer:
servers:
- url: http://backend:3000
-33
View File
@@ -1,33 +0,0 @@
// Smoke test for https://github.com/TecharoHQ/anubis/issues/1628
//
// Traefik's forwardAuth middleware calls Anubis at the literal path
// /.within.website/x/cmd/anubis/api/check and conveys the original URL in the
// X-Forwarded-Uri header. Path-targeting policy rules must match that header
// (not r.URL.Path), otherwise every request looks like a request to /check.
const BASE = "http://localhost:8080";
const UA = "Mozilla/5.0 (compatible; AnubisTraefikSmoke/1.0)";
const cases = [
{ path: "/", expected: 307, why: "control: no DENY rule, default challenge redirect" },
{ path: "/free", expected: 307, why: "control: no DENY rule, default challenge redirect" },
{ path: "/admin", expected: 403, why: "path_regex must match X-Forwarded-Uri, not 307 or 200" },
{ path: "/admin/users", expected: 403, why: "path_regex must match X-Forwarded-Uri, not 307 or 200" },
{ path: "/api/secret", expected: 403, why: "CEL path must match X-Forwarded-Uri, not 307 or 200" },
];
let failed = false;
for (const c of cases) {
const resp = await fetch(`${BASE}${c.path}`, {
headers: { "User-Agent": UA },
redirect: "manual",
});
const ok = resp.status === c.expected;
console.log(
`${ok ? "PASS" : "FAIL"}: GET ${c.path}${resp.status} (want ${c.expected}: ${c.why})`,
);
if (!ok) failed = true;
}
process.exit(failed ? 1 : 0);
-22
View File
@@ -1,22 +0,0 @@
#!/usr/bin/env bash
set -eo pipefail
export VERSION=${GITHUB_SHA:-devel}-test
export KO_DOCKER_REPO=ko.local
set -u
source ../lib/lib.sh
build_anubis_ko
function cleanup() {
docker compose down -t 1 || :
}
trap cleanup EXIT SIGINT
docker compose up -d
backoff-retry --try-count 20 node ./test.mjs
-8
View File
@@ -1,8 +0,0 @@
entryPoints:
web:
address: ":80"
providers:
file:
directory: /config
watch: false
-2
View File
@@ -1,2 +0,0 @@
*
!.gitignore