Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges×

Alerts This Week
Warning Icon 1 465
Alerts This Week
Warning Icon 1 465

Gentoo: GLSA-201409-10 High: Bash Code Injection Threat Fix

gentoo
Calendar Grey September 25, 2014
Scroller Gentoo
Gentoo Linux Notice: Bash security update tackling code injection vulnerabilities. Discover details regarding the resolution and the released updates.
A parsing flaw related to functions and environments in Bash could allow attackers to inject code

Summary

Stephane Chazelas reported that Bash incorrectly handles function definitions, allowing attackers to inject arbitrary code (CVE-2014-6271). Gentoo Linux informed about this issue in GLSA 201409-09. Tavis Ormandy reported that the patch for CVE-2014-6271 was incomplete. As such, this GLSA supersedes GLSA 201409-09.

Topics%20covered

Topics Covered

security advisory gentoo high threat resolution 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_p18-r1"
All Bash 3.2 users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-shells/bash-3.2_p52-r1"
All Bash 4.0 users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-shells/bash-4.0_p39-r1"
All Bash 4.1 users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-shells/bash-4.1_p12-r1"
All Bash 4.2 users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-shells/bash-4.2_p48-r1"

References

[ 1 ] CVE-2014-7169 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-7169

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201409-10
style>.gentoo_availability{display:block;}

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: High
Title: Bash: Code Injection (Updated fix for GLSA 201409-09)
Date: September 25, 2014
Bugs: #523592
ID: 201409-10

Topics%20covered

Topics Covered

security advisory gentoo high threat resolution code injection bash

Synopsis

A parsing flaw related to functions and environments in Bash could allow attackers to inject code. The unaffected packages listed in GLSA 201409-09 had an incomplete fix.

Background

Bash is the standard GNU Bourne Again SHell.

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-shells/bash < 4.2_p48-r1 *>= 3.1_p18-r1 *>= 3.2_p52-r1 *>= 4.0_p39-r1 *>= 4.1_p12-r1 >= 4.2_p48-r1

Impact

===== A remote attacker could exploit this vulnerability to execute arbitrary commands even in restricted environments.

Workaround

There is no known workaround at this time.