CVE-2020-5390

Publication date 13 January 2020

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
python-pysaml2	19.10 eoan	Fixed 4.5.0+dfsg1-0ubuntu2.19.10.1
	19.04 disco	Fixed 4.5.0+dfsg1-0ubuntu2.19.04.1
	18.04 LTS bionic	Fixed 4.0.2-0ubuntu3.1
	16.04 LTS xenial	Fixed 3.0.0-3ubuntu1.16.04.4
	14.04 LTS trusty	Not in release

Severity score breakdown

Parameter	Value
Base score	7.5 · High
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

References

Related Ubuntu Security Notices (USN)