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.

CVSS v3 6.5 MEDIUM
CVSS v2.0 4.3 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

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

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:N/I:P/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

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

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2021-01-21 15:15

Updated : 2024-02-04 21:23

NVD link : CVE-2021-21238

Mitre link : CVE-2021-21238

CVE.ORG link : CVE-2021-21238

JSON object : View

Products Affected

pysaml2_project

pysaml2

CWE

CWE-347

Improper Verification of Cryptographic Signature

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