#VU105688 Improper Verification of Cryptographic Signature in SAML SSO for Ruby - CVE-2025-25292
Vulnerability identifier: #VU105688
Vulnerability risk: High
CVSSv4.0: 8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID:
CWE-ID:
CWE-347
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
SAML SSO for Ruby
Web applications /
Other software
Vendor: SAML-Toolkits
Description
The vulnerability allows a remote attacker to bypass authentication on the system.
The vulnerability exists due to a parser differential. A remote attacker can execute a Signature Wrapping attack on the target system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
SAML SSO for Ruby: 1.0.0, 1.1.0 - 1.17.0, 1.2.0, 1.3.0 - 1.3.1, 1.4.0 - 1.4.3, 1.5.0, 1.6.0 - 1.6.2, 1.7.0 - 1.7.2, 1.8.0, 1.9.0
External links
https://about.gitlab.com/releases/2025/03/12/patch-release-gitlab-17-9-2-released
https://github.blog/security/sign-in-as-anyone-bypassing-saml-sso-authentication-with-parser-differentials
https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-hw46-3hmr-x9xv
https://github.com/SAML-Toolkits/ruby-saml/commit/e76c5b36bac40aedbf1ba7ffaaf495be63328cd9
https://github.com/SAML-Toolkits/ruby-saml/commit/e9c1cdbd0f9afa467b585de279db0cbd0fb8ae97
https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.12.4
https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.18.0
https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-754f-8gm6-c4r2
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
