Security Digest · Critical advisory (no CVE assigned)
GHSA-hx5q-v6pj-533r: SAML authentication bypass due to missing validation on unsigned SAML messages
Impact When SAML is used as the authentication mechanism, Central Dogma accepts unsigned SAML messages (assertions, logout requests, etc.) as they are, rather than rejecting them by default.
CVSS 9.1 Critical GitHub-reviewed · critical
Should you act?
- Only if you depend on one of the packages below, directly or transitively, in a vulnerable version. Check your lockfile with
mvn dependency:tree -Dincludes=<groupId>:<artifactId>. - No CVE has been assigned, so it will not appear in CVE-based scanners that ignore GitHub advisories.
npm audit,pip-auditand Dependabot do read GitHub advisories.
Affected packages
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| Maven | com.linecorp.centraldogma:centraldogma-server-auth-saml | <= 0.64.2 | 0.64.3 |
Details
Impact
When SAML is used as the authentication mechanism, Central Dogma accepts unsigned SAML messages (assertions, logout requests, etc.) as they are, rather than rejecting them by default. As a result, an attacker can forge a SAML message to authenticate themselves, despite the fact that such an unsigned SAML message should be rejected.
Patches
The vulnerability has been patched in Central Dogma 0.64.3 by updating its Armeria dependency to 1.27.2. All users who use SAML as the authentication mechanism must upgrade from 0.64.3 or later.
Workarounds
A user can manually upgrade the armeria-saml module with the one from Armeria 1.27.2 or later, either by replacing the JAR in the Central Dogma distribution or by updating the dependency tree of the build.
References
SamlMessageUtil.validateSignature()
CVSS: 9.1 (v3.1) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Sources and references
- GitHub Advisory GHSA-hx5q-v6pj-533r github.com
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com