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

This script is Copyright (C) 2014-2015 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-201409-10
(Bash: Code Injection (Updated fix for GLSA 201409-09))

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.

See also :

https://security.gentoo.org/glsa/201409-10

Solution :

All Bash 3.1 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=app-shells/bash-3.1_p18-r1:3.1'
All Bash 3.2 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=app-shells/bash-3.2_p52-r1:3.2'
All Bash 4.0 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=app-shells/bash-4.0_p39-r1:4.0'
All Bash 4.1 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=app-shells/bash-4.1_p12-r1:4.1'
All Bash 4.2 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=app-shells/bash-4.2_p48-r1'

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 7.8
(CVSS2#E:POC/RL:OF/RC:C)
Public Exploit Available : true

Family: Gentoo Local Security Checks

Nessus Plugin ID: 77886 ()

Bugtraq ID: 70137

CVE ID: CVE-2014-7169

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