Gentoo: GLSA-201409-09: Bash: Code Injection
Summary
Stephane Chazelas reported that Bash incorrectly handles function definitions, allowing attackers to inject arbitrary code.
Resolution
All Bash 3.1 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/bash-3.1_p18"
All Bash 3.2 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/bash-3.2_p52"
All Bash 4.0 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/bash-4.0_p39"
All Bash 4.1 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/bash-4.1_p12"
All Bash 4.2 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/bash-4.2_p48"
References
[ 1 ] CVE-2014-6271 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-6271
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/201409-09
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.
Synopsis
A parsing flaw related to functions and environments in Bash could allow attackers to inject code.
Background
Bash is the standard GNU Bourne Again SHell.
Affected Packages
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-shells/bash < 4.2_p48 *>= 3.1_p18 *>= 3.2_p52 *>= 4.0_p39 *>= 4.1_p12 >= 4.2_p48
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.