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Fencer Vulns
critical 10.0

CVE-2024-45409 in the critical feed json

The Ruby SAML library vulnerable to a SAML authentication bypass via Incorrect XPath selector

published 2024-09-10 2 y ago modified 2026-11-04 5 d ago also BIT-gitlab-2024-45409 , EUVD-2024-2828 , GHSA-jw9c-mfg7-9rx2

cvss
10.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
10.7%
EPSS 10.7% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

The Ruby SAML library is for implementing the client side of a SAML authorization. Ruby-SAML in <= 12.2 and 1.13.0 <= 1.16.0 does not properly verify the signature of the SAML Response. An unauthenticated attacker with access to any signed saml document (by the IdP) can thus forge a SAML Response/Assertion with arbitrary contents. This would allow the attacker to log in as arbitrary user within the vulnerable system. This vulnerability is fixed in 1.17.0 and 1.12.3.

Patch / fix

  • rubygems ruby-saml 1.12.3, 1.17.0
  • bitnami gitlab 16.11.10, 17.0.8, 17.1.8, 17.2.7, 17.3.3
  • onelogin ruby-saml 1.12.3, 1.17.0
  • ruby-saml Debian 12 1.13.0-1+deb12u1

debian advisories DEBIAN-CVE-2024-45409

  • ruby-saml Ubuntu 20.04 LTS 1.11.0-1ubuntu0.1
  • ruby-saml Ubuntu 22.04 LTS 1.13.0-1ubuntu0.1
  • ruby-saml Ubuntu 24.04 LTS 1.15.0-1ubuntu0.24.04.1
  • ruby-saml Ubuntu Pro 16.04 LTS 1.1.2-1ubuntu1+esm1
  • ruby-saml Ubuntu Pro 18.04 LTS 1.7.2-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2024-45409

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
total
Assessed
2 y ago

Exploit prediction

10.68% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
GitHub 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
rubygems ruby-saml
<1.12.3
>=1.13.0, <1.17.0
1.12.3
1.17.0
bitnami gitlab
<16.11.10
>=17.0.0, <17.0.8
>=17.1.0, <17.1.8
>=17.2.0, <17.2.7
>=17.3.0, <17.3.3
16.11.10
17.0.8
17.1.8
17.2.7
17.3.3

Affected products

  • SAML-Toolkits ruby-saml
  • onelogin ruby-saml
  • omniauth omniauth-saml

Classification

Weakness
  • CWE-347 Improper Verification of Cryptographic Signature
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.