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Gentoo: 202310-02 Critical: Python Library Security Vulnerability

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Calendar Grey October 5, 2014
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Several parsing vulnerabilities in Bash may allow for remote code execution or denial of service. Promptly update to safeguard your environment.
Multiple parsing flaws in Bash could allow remote attackers to inject code or cause a Denial of Service condition.

Summary

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.

Topics%20covered

Topics Covered

security advisory denial of service gentoo remote code execution high code injection bash

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

[ 1 ] CVE-2014-6277 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-6277 [ 2 ] CVE-2014-6278 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-6278 [ 3 ] CVE-2014-7186 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-7186 [ 4 ] CVE-2014-7187 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-7187

Availability

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

Severity
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Severity: High
Title: Bash: Multiple vulnerabilities
Date: October 04, 2014
Bugs: #523742, #524256
ID: 201410-01

Topics%20covered

Topics Covered

security advisory denial of service gentoo remote code execution high code injection bash

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.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-shells/bash < 4.2_p52 *>= 3.1_p22 *>= 3.2_p56 *>= 4.0_p43 *>= 4.1_p16 >= 4.2_p52

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.