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GHSA-4m6j-23p2-8c54

Armeria SAML authentication bypass due to missing validation on unsigned SAML messages

Source: GitHub Advisory Database (reviewed) Critical CVE-2024-1735

Packages

EcosystemPackageAffectedFixed in
Maven com.linecorp.armeria:armeria-saml < 1.27.2 1.27.2

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact The SAML implementation provided by `armeria-saml` currently 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 Armeria version 1.27.2. All users who rely on `armeria-saml` older than version 1.27.2 must upgrade to 1.27.2 or later. ### Workarounds There is no known workaround for this vulnerability. ### References [`SamlMessageUtil.validateSignature()`](https://github.com/line/armeria/blob/0efc776988d71be4da6e506ec8a33c2b7b43f567/saml/src/main/java/com/linecorp/armeria/server/saml/SamlMessageUtil.java#L160-L163)

References

External links from the advisory. They lead to third-party sites.