CVE Vulnerability

CVE-2021-21238

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.

4.3 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

6.5 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://pypi.org/project/pysaml2 Product Third Party Advisory
https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0 Third Party Advisory
https://github.com/IdentityPython/pysaml2/commit/1d8fd268f5bf887480a403a7a5ef8f048157cc14 Patch Third Party Advisory
https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-f4g9-h89h-jgv9 Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:pysaml2_project:pysaml2:*:*:*:*:*:*:*:*
Information

Published : 2021-01-21 03:15

Updated : 2021-01-29 05:58

NVD link : CVE-2021-21238

Mitre link : CVE-2021-21238

Products Affected
No products.
CWE
CWE-347

Improper Verification of Cryptographic Signature