[ GLSA 201409-10 ] Bash: Code Injection (Updated fix for GLSA 201409-09)

[GLSA]

Gentoo Linux Security Advisory

Title: Bash: Code Injection (Updated fix for GLSA 201409-09) (GLSA 201409-10)
Severity: high
Exploitable: local, remote
Date: September 25, 2014
Updated: October 04, 2014
Bug(s): #523592
ID: 201409-10

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.

Affected Packages

Package: app-shells/bash
Vulnerable: < 4.2_p48-r1
Unaffected: >= 3.1_p18-r1 < 3.2
Unaffected: >= 3.2_p52-r1 < 3.3
Unaffected: >= 4.0_p39-r1 < 4.1
Unaffected: >= 4.1_p12-r1 < 4.2
Unaffected: >= 4.2_p48-r1
Architectures: All supported architectures


Description

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.


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.

Resolution

All Bash 3.1 users should upgrade to the latest version: