GLSA 201801-11: PySAML2: Security bypass

http://security.gentoo.org/

Severity:	normal
Title:	PySAML2: Security bypass
Date:	01/11/2018
Bugs:	#644016
ID:	201801-11

Synopsis

A vulnerability in PySAML2 might allow remote attackers to bypass authentication.

Background

PySAML2 is a pure python implementation of SAML2

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-python/pysaml2	< 4.0.2-r3	>= 4.0.2-r3	All supported architectures

Description

It was found that the PySAML2 relies on an assert statement to check the user’s password. A python optimizations might remove this assertion.

Impact

A remote attacker could bypass security restrictions and access any application which is using PySAML2 for authentication.

Workaround

Disable python optimizations.

Resolution

All PySAML2 4.0 users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-python/pysaml2-4.0.2-r3"

All PySAML2 4.5 users should upgrade to the latest version:


      # emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-python/pysaml2-4.5.0"

References

CVE-2017-1000433

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201801-11.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.