Executive Summary

Informations
Name CVE-2020-5390 First vendor Publication 2020-01-13
Vendor Cve Last vendor Modification 2023-02-01

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Overall CVSS Score 7.5
Base Score 7.5 Environmental Score 7.5
impact SubScore 3.6 Temporal Score 7.5
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
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:L/Au:N/C:N/I:P/A:N)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

PySAML2 before 5.0.0 does not check that the signature in a SAML document is enveloped and thus signature wrapping is effective, i.e., it is affected by XML Signature Wrapping (XSW). The signature information and the node/object that is signed can be in different places and thus the signature verification will succeed, but the wrong data will be used. This specifically affects the verification of assertion that have been signed.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-5390

CWE : Common Weakness Enumeration

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

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 2
Os 4
Os 3

Sources (Detail)

Source Url
CONFIRM https://github.com/IdentityPython/pysaml2/commit/5e9d5acbcd8ae45c4e736ac521fd...
https://github.com/IdentityPython/pysaml2/commit/f27c7e7a7010f83380566a219fd6...
https://github.com/IdentityPython/pysaml2/releases
https://github.com/IdentityPython/pysaml2/releases/tag/v5.0.0
DEBIAN https://www.debian.org/security/2020/dsa-4630
MISC https://pypi.org/project/pysaml2/5.0.0/
MLIST https://lists.debian.org/debian-lts-announce/2020/02/msg00025.html
UBUNTU https://usn.ubuntu.com/4245-1/

Alert History

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Date Informations
2023-02-01 21:27:54
  • Multiple Updates
2021-05-04 13:53:25
  • Multiple Updates
2021-04-22 03:04:27
  • Multiple Updates
2020-05-23 02:37:01
  • First insertion