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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-21239 Detail

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. Users of pysaml2 that use the default CryptoBackendXmlSec1 backend and need to verify signed SAML documents are impacted. PySAML2 does not ensure that a signed SAML document is correctly signed. The default CryptoBackendXmlSec1 backend is using the xmlsec1 binary to verify the signature of signed SAML documents, but by default xmlsec1 accepts any type of key found within the given document. xmlsec1 needs to be configured explicitly to only use only _x509 certificates_ for the verification process of the SAML document signature. This is fixed in PySAML2 6.5.0.


Metrics

 
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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/IdentityPython/pysaml2/commit/46578df0695269a16f1c94171f1429873f90ed99 Patch  Third Party Advisory 
https://github.com/IdentityPython/pysaml2/commit/46578df0695269a16f1c94171f1429873f90ed99 Patch  Third Party Advisory 
https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0 Third Party Advisory 
https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0 Third Party Advisory 
https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-5p3x-r448-pc62 Third Party Advisory 
https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-5p3x-r448-pc62 Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2021/02/msg00038.html Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2021/02/msg00038.html Mailing List  Third Party Advisory 
https://pypi.org/project/pysaml2 Product  Third Party Advisory 
https://pypi.org/project/pysaml2 Product  Third Party Advisory 
https://www.aleksey.com/pipermail/xmlsec/2013/009717.html Exploit  Mailing List  Third Party Advisory 
https://www.aleksey.com/pipermail/xmlsec/2013/009717.html Exploit  Mailing List  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-347 Improper Verification of Cryptographic Signature GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

6 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-21239
NVD Published Date:
01/21/2021
NVD Last Modified:
11/21/2024
Source:
GitHub, Inc.