GLSA 201410-01: Bash: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	high
Title:	Bash: Multiple vulnerabilities
Date:	10/04/2014
Bugs:	#523742, #524256
ID:	201410-01

Synopsis

Multiple parsing flaws in Bash could allow remote attackers to inject code or cause a Denial of Service condition.

Background

Bash is the standard GNU Bourne Again SHell.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-shells/bash	< 4.2_p52	>= 3.1_p22	All supported architectures

Description

Florian Weimer, Todd Sabin, Michal Zalewski et al. discovered further parsing flaws in Bash. The unaffected Gentoo packages listed in this GLSA contain the official patches to fix the issues tracked as CVE-2014-6277, CVE-2014-7186, and CVE-2014-7187. Furthermore, the official patch known as “function prefix patch” is included which prevents the exploitation of CVE-2014-6278.

Impact

A remote attacker could exploit these vulnerabilities to execute arbitrary commands or cause a Denial of Service condition via various vectors.

Workaround

There is no known workaround at this time.

Resolution

All Bash 3.1 users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=app-shells/bash-3.1_p22:3.1"

All Bash 3.2 users should upgrade to the latest version:


      # emerge --sync
      # emerge --ask --oneshot --verbose ">=app-shells/bash-3.2_p56:3.2"

All Bash 4.0 users should upgrade to the latest version:


      # emerge --sync
      # emerge --ask --oneshot --verbose ">=app-shells/bash-4.0_p43:4.0"

All Bash 4.1 users should upgrade to the latest version:


      # emerge --sync
      # emerge --ask --oneshot --verbose ">=app-shells/bash-4.1_p16:4.1"

All Bash 4.2 users should upgrade to the latest version:


      # emerge --sync
      # emerge --ask --oneshot --verbose ">=app-shells/bash-4.2_p52"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201410-01.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.