GLSA 201706-01: MUNGE: Privilege escalation

http://security.gentoo.org/

Severity:	high
Title:	MUNGE: Privilege escalation
Date:	06/06/2017
Bugs:	#602596
ID:	201706-01

Synopsis

Gentoo's MUNGE ebuilds are vulnerable to privilege escalation due to improper permissions.

Background

An authentication service for creating and validating credentials.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
sys-auth/munge	< 0.5.10-r2	>= 0.5.10-r2	All supported architectures

Description

It was discovered that Gentoo’s default MUNGE installation suffered from a privilege escalation vulnerability (munge user to root) due to improper permissions and a runscript which called chown() on a user controlled file.

Impact

A local attacker, who either is already MUNGE’s system user or belongs to MUNGE’s group, could potentially escalate privileges.

Workaround

There is no known workaround at this time.

Resolution

All MUNGE users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=sys-auth/munge-0.5.10-r2"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201706-01.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.