| Name | CVE-2025-27773 |
| Description | The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. Prior to versions 4.17.0 and 5.0.0-alpha.20, there is a signature confusion attack in the HTTPRedirect binding. An attacker with any signed SAMLResponse via the HTTP-Redirect binding can cause the application to accept an unsigned message. Versions 4.17.0 and 5.0.0-alpha.20 contain a fix for the issue. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4161-1 |
| Debian Bugs | 1100595 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| simplesamlphp (PTS) | bullseye | 1.19.0-1 | vulnerable |
| bullseye (security) | 1.19.0-1+deb11u2 | fixed |
| bookworm, bookworm (security) | 1.19.7-1+deb12u1 | vulnerable |
| sid | 1.19.7-2 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bookworm] - simplesamlphp <no-dsa> (Will be fixed via point release)
https://github.com/simplesamlphp/saml2/security/advisories/GHSA-46r4-f8gj-xg56
https://github.com/simplesamlphp/saml2/commit/7867d6099dc7f31bed1ea10e5bea159c5623d2a0
SimpleSAMLphp SAML2 library embedded in simplesamlphp