Executive Summary

Informations
Name CVE-2021-21238 First vendor Publication 2021-01-21
Vendor Cve Last vendor Modification 2021-01-29

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Overall CVSS Score 6.5
Base Score 6.5 Environmental Score 6.5
impact SubScore 3.6 Temporal Score 6.5
Exploitabality Sub Score 2.8
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction Required
Scope Unchanged Confidentiality Impact None
Integrity Impact High Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Cvss Base Score 4.3 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21238

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-347 Improper Verification of Cryptographic Signature

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 2

Sources (Detail)

Source Url
CONFIRM https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-f4g9-h89h-...
MISC https://github.com/IdentityPython/pysaml2/commit/1d8fd268f5bf887480a403a7a5ef...
https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0
https://pypi.org/project/pysaml2

Alert History

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Date Informations
2021-05-04 14:06:50
  • Multiple Updates
2021-04-22 03:11:39
  • Multiple Updates
2021-01-29 21:23:37
  • Multiple Updates
2021-01-26 21:23:50
  • Multiple Updates
2021-01-21 21:23:33
  • First insertion