z0x/anubis
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v1.15.1: Zenos yae Galvus: Echo 1 (#181)

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* version 1.15.0 (#144)

Signed-off-by: Xe Iaso <me@xeiaso.net>

* cmd/anubis actually check the result with the correct difficulty

Signed-off-by: Xe Iaso <me@xeiaso.net>

* v1.15.1: Zenos yae Galvus: Echo 1

Signed-off-by: Xe Iaso <me@xeiaso.net>

---------

Signed-off-by: Xe Iaso <me@xeiaso.net>
Co-authored-by: Henri Vasserman <henv@hot.ee>
This commit is contained in:
Xe Iaso 2025-03-31 18:27:01 -04:00 • committed by GitHub
parent 4b8efcba9b
commit f844fffd1e
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GPG key ID: B5690EEEBB952194
3 changed files with 22 additions and 11 deletions
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2
VERSION
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@ -1 +1 @@
1.15.0
1.15.1

12
docs/docs/CHANGELOG.md
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@ -11,6 +11,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [Unreleased]
## v1.15.1
Zenos yae Galvus: Echo 1
Fixes a recurrence of [CVE-2025-24369](https://github.com/Xe/x/security/advisories/GHSA-56w8-8ppj-2p4f)
due to an incorrect logic change in a refactor. This allows an attacker to mint a valid
access token by passing any SHA-256 hash instead of one that matches the proof-of-work
test.
This case has been added as a regression test. It was not when CVE-2025-24369 was released
due to the project not having the maturity required to enable this kind of regression testing.
## v1.15.0
Zenos yae Galvus

5
lib/anubis.go
View file

@ -152,7 +152,6 @@ type Server struct {
policy *policy.ParsedConfig
opts Options
DNSBLCache *decaymap.Impl[string, dnsbl.DroneBLResponse]
ChallengeDifficulty int
}
func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
@ -428,9 +427,9 @@ func (s *Server) PassChallenge(w http.ResponseWriter, r *http.Request) {
}
// compare the leading zeroes
if !strings.HasPrefix(response, strings.Repeat("0", s.ChallengeDifficulty)) {
if !strings.HasPrefix(response, strings.Repeat("0", rule.Challenge.Difficulty)) {
s.ClearCookie(w)
lg.Debug("difficulty check failed", "response", response, "difficulty", s.ChallengeDifficulty)
lg.Debug("difficulty check failed", "response", response, "difficulty", rule.Challenge.Difficulty)
templ.Handler(web.Base("Oh noes!", web.ErrorPage("invalid response")), templ.WithStatus(http.StatusForbidden)).ServeHTTP(w, r)
failedValidations.Inc()
return