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Gentoo 201409-09 Critical: Bash Code Injection Vulnerability Found

A parsing flaw related to functions and environments in Bash could allow attackers to inject code.. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201409-09 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: Bash: Code Injection Date: September 24, 2014 Bugs: #523592 ID: 201409-09 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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 Description ========== Stephane Chazelas reported that Bash incorrectly handles function definitions, allowing attackers to inject arbitrary code. 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: # 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 This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at https://bugs.gentoo.org. License ====== Copyright 2014 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.5/ . Gentoo has issued a warning about a critical Bash code injection vulnerability. Update now using gentoo emerge --update =bash- and reboot afterwards for safety. Bash Code Injection,Gentoo Security Advisory,Code Execution Risk. . Severity: Critical. LinuxSecurity.com Team

Sep 25, 2014 •Critical Gentoo