PyPi: Pysaml2

CVE-2021-21238

Safety vulnerability ID: 39497

This vulnerability was reviewed by experts

The information on this page was manually curated by our Cybersecurity Intelligence Team.

Created at Jan 21, 2021 Updated at Nov 29, 2024
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Advisory

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. See CVE-2021-21238.

Affected package

pysaml2

Latest version: 7.5.0

Python implementation of SAML Version 2 Standard

Affected versions

Fixed versions

Vulnerability changelog

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. See CVE-2021-21238.


CONFIRM:https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-f4g9-h89h-jgv9: https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-f4g9-h89h-jgv9
MISC:https://github.com/IdentityPython/pysaml2/commit/1d8fd268f5bf887480a403a7a5ef8f048157cc14: https://github.com/IdentityPython/pysaml2/commit/1d8fd268f5bf887480a403a7a5ef8f048157cc14
MISC:https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0: https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0
MISC:https://pypi.org/project/pysaml2: https://pypi.org/project/pysaml2

Resources

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Severity Details

CVSS Base Score

MEDIUM 6.5

CVSS v3 Details

MEDIUM 6.5
Attack Vector (AV)
NETWORK
Attack Complexity (AC)
LOW
Privileges Required (PR)
NONE
User Interaction (UI)
REQUIRED
Scope (S)
UNCHANGED
Confidentiality Impact (C)
NONE
Integrity Impact (I)
HIGH
Availability Availability (A)
NONE

CVSS v2 Details

MEDIUM 4.3
Access Vector (AV)
NETWORK
Access Complexity (AC)
MEDIUM
Authentication (Au)
NONE
Confidentiality Impact (C)
NONE
Integrity Impact (I)
PARTIAL
Availability Impact (A)
NONE