CVE-2025-25292

Name	CVE-2025-25292
Description	ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. An authentication bypass vulnerability was found in ruby-saml prior to versions 1.12.4 and 1.18.0 due to a parser differential. ReXML and Nokogiri parse XML differently, the parsers can generate entirely different document structures from the same XML input. That allows an attacker to be able to execute a Signature Wrapping attack. This issue may lead to authentication bypass. Versions 1.12.4 and 1.18.0 contain a patch 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-4115-1
Debian Bugs	1100441

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
ruby-saml (PTS)	bullseye	1.11.0-1	vulnerable
	bullseye (security)	1.11.0-1+deb11u2	fixed
	bookworm, bookworm (security)	1.13.0-1+deb12u1	vulnerable
	sid, trixie	1.17.0-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
ruby-saml	source	bullseye	1.11.0-1+deb11u2		DLA-4115-1
ruby-saml	source	(unstable)	(unfixed)			1100441

Notes

https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-754f-8gm6-c4r2
https://github.com/SAML-Toolkits/ruby-saml/commit/e9c1cdbd0f9afa467b585de279db0cbd0fb8ae97 (v1.18.0)
https://github.com/SAML-Toolkits/ruby-saml/commit/e76c5b36bac40aedbf1ba7ffaaf495be63328cd9 (v1.12.4)