CVE-2025-27773

Published: Mar 11, 2025Modified: May 9, 2025

8.6

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Exploitability: 3.9 / Impact: 4.0

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-347

Improper Verification of Cryptographic Signature

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

References (5)

https://github.com/simplesamlphp/saml2/blob/9545abd0d9d48388f2fa00469c5c1e0294f0303e/src/SAML2/HTTPRedirect.php#L104-L113

Source: security-advisories@github.com

https://github.com/simplesamlphp/saml2/blob/9545abd0d9d48388f2fa00469c5c1e0294f0303e/src/SAML2/HTTPRedirect.php#L178-L217

Source: security-advisories@github.com

https://github.com/simplesamlphp/saml2/commit/7867d6099dc7f31bed1ea10e5bea159c5623d2a0

Source: security-advisories@github.com

https://github.com/simplesamlphp/saml2/security/advisories/GHSA-46r4-f8gj-xg56

Source: security-advisories@github.com

https://lists.debian.org/debian-lts-announce/2025/05/msg00013.html

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.