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CVE-2020-5390

Published: 13 January 2020

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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
python-pysaml2
Launchpad, Ubuntu, Debian
bionic
Released (4.0.2-0ubuntu3.1)
disco
Released (4.5.0+dfsg1-0ubuntu2.19.04.1)
eoan
Released (4.5.0+dfsg1-0ubuntu2.19.10.1)
trusty Does not exist

upstream Needs triage

xenial
Released (3.0.0-3ubuntu1.16.04.4)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N