Security
Security
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.
| Package | app-shells/bash on all architectures |
|---|---|
| Affected versions | < 4.2_p48-r1 |
| Unaffected versions | revision >= 3.1_p18-r1 revision >= 3.2_p52-r1 revision >= 4.0_p39-r1 revision >= 4.1_p12-r1 >= 4.2_p48-r1 |
Bash is the standard GNU Bourne Again SHell.
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.
A remote attacker could exploit this vulnerability to execute arbitrary commands even in restricted environments.
There is no known workaround at this time.
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"
Release date
September 25, 2014
Latest revision
October 04, 2014: 2
Severity
high
Exploitable
local, remote
Bugzilla entries