GLSA 201709-19: Exim: Local privilege escalation

http://security.gentoo.org/

Severity:	normal
Title:	Exim: Local privilege escalation
Date:	09/24/2017
Bugs:	#622212
ID:	201709-19

Synopsis

A vulnerability in Exim may allow local users to gain root privileges.

Background

Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
mail-mta/exim	< 4.89-r1	>= 4.89-r1	All supported architectures

Description

Exim supports the use of multiple “-p” command line arguments causing a memory leak. This could lead to a stack-clash in user-space and as result the attacker can, “clash” or “smash” the stack or another memory region, or “jump” over the stack guard-page.

Impact

A local attacker could obtain root privileges.

Workaround

There is no known workaround at this time.

Resolution

All Exim users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=mail-mta/exim-4.89-r1"

References

CVE-2017-1000369

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201709-19.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.