Home/CVE/The crewjam/saml go library prior to version 0.4.9 is vulnerable to an authentication bypass when processing SAML respon
CVE

CVE-2022-41912

The crewjam/saml go library prior to version 0.4.9 is vulnerable to an authentication bypass when processing SAML respon

The crewjam/saml go library prior to version 0.4.9 is vulnerable to an authentication bypass when processing SAML responses containing multiple Assertion elements. This issue has been corrected in version 0.4.9. There are no workarounds other than upgrading to a fixed version.

CRITICAL · CVSS 9.1 EPSS 0.00303
Act now
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules3 YARA rules0
⬡

Weakness Classification

CWE-287Improper Authentication
▤

Affected Products & Versions

1
saml project saml< 0.4.9
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go github.com/crewjam/saml CRITICAL fixed in 0.4.9
⚠

Public Exploits & PoCs

1
pocpacketstormsecurity.com · crewjam-saml-Signature-Bypass.htmlpacketstormsecurity.com
◈

Sigma Hunt Rules

3
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSAML Token Issuer Anomaly
productmediumAWS SAML Provider Deletion Activity
productmediumAWS Suspicious SAML Activity
▣

Scoring & Timeline

9.1
CRITICAL · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD28 Nov 2022 · 03:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

7
rhsaRHSA-2023:6420Moderate
rhsaRHSA-2023:3642Important
rhsaRHSA-2023:0574Moderate
rhsaRHSA-2022:9040Important
rhsaRHSA-2022:9108Critical
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/crewjam/saml/commit/aee3fb1edeeaf1088fcb458727e0fd863d277f8bPatchThird Party Advisory
https://github.com/crewjam/saml/security/advisories/GHSA-j2jp-wvqg-wc2gThird Party Advisory
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