Vulnerability Description
PySAML2 is a pure python implementation of SAML Version 2 Standard. PySAML2 before 6.5.0 has an improper verification of cryptographic signature vulnerability. All users of pysaml2 that need to validate signed SAML documents are impacted. The vulnerability is a variant of XML Signature wrapping because it did not validate the SAML document against an XML schema. This allowed invalid XML documents to be processed and such a document can trick pysaml2 with a wrapped signature. This is fixed in PySAML2 6.5.0.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Pysaml2 Project | Pysaml2 | < 6.5.0 |
Related Weaknesses (CWE)
References
- https://github.com/IdentityPython/pysaml2/commit/1d8fd268f5bf887480a403a7a5ef8f0PatchThird Party Advisory
- https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0Third Party Advisory
- https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-f4g9-h89h-jgvThird Party Advisory
- https://pypi.org/project/pysaml2ProductThird Party Advisory
- https://github.com/IdentityPython/pysaml2/commit/1d8fd268f5bf887480a403a7a5ef8f0PatchThird Party Advisory
- https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0Third Party Advisory
- https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-f4g9-h89h-jgvThird Party Advisory
- https://pypi.org/project/pysaml2ProductThird Party Advisory
FAQ
What is CVE-2021-21238?
CVE-2021-21238 is a vulnerability with a CVSS score of 6.5 (MEDIUM). PySAML2 is a pure python implementation of SAML Version 2 Standard. PySAML2 before 6.5.0 has an improper verification of cryptographic signature vulnerability. All users of pysaml2 that need to valida...
How severe is CVE-2021-21238?
CVE-2021-21238 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-21238?
Check the references section above for vendor advisories and patch information. Affected products include: Pysaml2 Project Pysaml2.