===================================================================== CERT-Renater Note d'Information No. 2014/VULN206 _____________________________________________________________________ DATE : 29/09/2014 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Red Hat Enterprise Linux versions 4, 5.6, 5.9, 6.2, 6.4. ====================================================================== https://rhn.redhat.com/errata/RHSA-2014-1311.html ______________________________________________________________________ ===================================================================== Red Hat Security Advisory Synopsis: Important: bash security update Advisory ID: RHSA-2014:1311-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-1311.html Issue date: 2014-09-26 CVE Names: CVE-2014-7169 CVE-2014-7186 CVE-2014-7187 ===================================================================== 1. Summary: Updated bash packages that fix one security issue are now available for Red Hat Enterprise Linux 4 Extended Life Cycle Support, Red Hat Enterprise Linux 5.6 Long Life, Red Hat Enterprise Linux 5.9 Extended Update Support, Red Hat Enterprise Linux 6.2 Advanced Update Support, and Red Hat Enterprise Linux 6.4 Extended Update Support. Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux AS (v. 4 ELS) - i386, ia64, x86_64 Red Hat Enterprise Linux AUS (v. 6.2 server) - x86_64 Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.4) - x86_64 Red Hat Enterprise Linux ES (v. 4 ELS) - i386, x86_64 Red Hat Enterprise Linux EUS (v. 5.9 server) - i386, ia64, ppc, s390x, x86_64 Red Hat Enterprise Linux HPC Node EUS (v. 6.4) - x86_64 Red Hat Enterprise Linux LL (v. 5.6 server) - i386, ia64, x86_64 Red Hat Enterprise Linux Server EUS (v. 6.4) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 6.2) - x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 6.4) - i386, ppc64, s390x, x86_64 3. Description: The GNU Bourne Again shell (Bash) is a shell and command language interpreter compatible with the Bourne shell (sh). Bash is the default shell for Red Hat Enterprise Linux. It was found that the fix for CVE-2014-6271 was incomplete, and Bash still allowed certain characters to be injected into other environments via specially crafted environment variables. An attacker could potentially use this flaw to override or bypass environment restrictions to execute shell commands. Certain services and applications allow remote unauthenticated attackers to provide environment variables, allowing them to exploit this issue. (CVE-2014-7169) Applications which directly create Bash functions as environment variables need to be made aware of the changes to the way names are handled by this update. For more information see the Knowledgebase article at https://access.redhat.com/articles/1200223 Note: Docker users are advised to use "yum update" within their containers, and to commit the resulting changes. For additional information on CVE-2014-6271 and CVE-2014-7169, refer to the aforementioned Knowledgebase article. All bash users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1146319 - CVE-2014-7169 bash: code execution via specially-crafted environment (Incomplete fix for CVE-2014-6271) 6. Package List: Red Hat Enterprise Linux AS (v. 4 ELS): Source: bash-3.0-27.el4.4.src.rpm i386: bash-3.0-27.el4.4.i386.rpm bash-debuginfo-3.0-27.el4.4.i386.rpm ia64: bash-3.0-27.el4.4.i386.rpm bash-3.0-27.el4.4.ia64.rpm bash-debuginfo-3.0-27.el4.4.i386.rpm bash-debuginfo-3.0-27.el4.4.ia64.rpm x86_64: bash-3.0-27.el4.4.x86_64.rpm bash-debuginfo-3.0-27.el4.4.x86_64.rpm Red Hat Enterprise Linux ES (v. 4 ELS): Source: bash-3.0-27.el4.4.src.rpm i386: bash-3.0-27.el4.4.i386.rpm bash-debuginfo-3.0-27.el4.4.i386.rpm x86_64: bash-3.0-27.el4.4.x86_64.rpm bash-debuginfo-3.0-27.el4.4.x86_64.rpm Red Hat Enterprise Linux LL (v. 5.6 server): Source: bash-3.2-24.el5_6.2.src.rpm i386: bash-3.2-24.el5_6.2.i386.rpm bash-debuginfo-3.2-24.el5_6.2.i386.rpm ia64: bash-3.2-24.el5_6.2.i386.rpm bash-3.2-24.el5_6.2.ia64.rpm bash-debuginfo-3.2-24.el5_6.2.i386.rpm bash-debuginfo-3.2-24.el5_6.2.ia64.rpm x86_64: bash-3.2-24.el5_6.2.x86_64.rpm bash-debuginfo-3.2-24.el5_6.2.x86_64.rpm Red Hat Enterprise Linux EUS (v. 5.9 server): Source: bash-3.2-32.el5_9.3.src.rpm i386: bash-3.2-32.el5_9.3.i386.rpm bash-debuginfo-3.2-32.el5_9.3.i386.rpm ia64: bash-3.2-32.el5_9.3.i386.rpm bash-3.2-32.el5_9.3.ia64.rpm bash-debuginfo-3.2-32.el5_9.3.i386.rpm bash-debuginfo-3.2-32.el5_9.3.ia64.rpm ppc: bash-3.2-32.el5_9.3.ppc.rpm bash-debuginfo-3.2-32.el5_9.3.ppc.rpm s390x: bash-3.2-32.el5_9.3.s390x.rpm bash-debuginfo-3.2-32.el5_9.3.s390x.rpm x86_64: bash-3.2-32.el5_9.3.x86_64.rpm bash-debuginfo-3.2-32.el5_9.3.x86_64.rpm Red Hat Enterprise Linux HPC Node EUS (v. 6.4): Source: bash-4.1.2-15.el6_4.2.src.rpm x86_64: bash-4.1.2-15.el6_4.2.x86_64.rpm bash-debuginfo-4.1.2-15.el6_4.2.x86_64.rpm Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.4): Source: bash-4.1.2-15.el6_4.2.src.rpm x86_64: bash-debuginfo-4.1.2-15.el6_4.2.x86_64.rpm bash-doc-4.1.2-15.el6_4.2.x86_64.rpm Red Hat Enterprise Linux AUS (v. 6.2 server): Source: bash-4.1.2-9.el6_2.2.src.rpm x86_64: bash-4.1.2-9.el6_2.2.x86_64.rpm bash-debuginfo-4.1.2-9.el6_2.2.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 6.4): Source: bash-4.1.2-15.el6_4.2.src.rpm i386: bash-4.1.2-15.el6_4.2.i686.rpm bash-debuginfo-4.1.2-15.el6_4.2.i686.rpm ppc64: bash-4.1.2-15.el6_4.2.ppc64.rpm bash-debuginfo-4.1.2-15.el6_4.2.ppc64.rpm s390x: bash-4.1.2-15.el6_4.2.s390x.rpm bash-debuginfo-4.1.2-15.el6_4.2.s390x.rpm x86_64: bash-4.1.2-15.el6_4.2.x86_64.rpm bash-debuginfo-4.1.2-15.el6_4.2.x86_64.rpm Red Hat Enterprise Linux Server Optional AUS (v. 6.2): Source: bash-4.1.2-9.el6_2.2.src.rpm x86_64: bash-debuginfo-4.1.2-9.el6_2.2.x86_64.rpm bash-doc-4.1.2-9.el6_2.2.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v. 6.4): Source: bash-4.1.2-15.el6_4.2.src.rpm i386: bash-debuginfo-4.1.2-15.el6_4.2.i686.rpm bash-doc-4.1.2-15.el6_4.2.i686.rpm ppc64: bash-debuginfo-4.1.2-15.el6_4.2.ppc64.rpm bash-doc-4.1.2-15.el6_4.2.ppc64.rpm s390x: bash-debuginfo-4.1.2-15.el6_4.2.s390x.rpm bash-doc-4.1.2-15.el6_4.2.s390x.rpm x86_64: bash-debuginfo-4.1.2-15.el6_4.2.x86_64.rpm bash-doc-4.1.2-15.el6_4.2.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2014-7169.html https://www.redhat.com/security/data/cve/CVE-2014-7186.html https://www.redhat.com/security/data/cve/CVE-2014-7187.html https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/articles/1200223 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2014 Red Hat, Inc. ========================================================= Serveur de référence du CERT-Renater https://services.renater.fr/ssi/ ========================================================== + CERT-RENATER | tel : 01-53-94-20-44 + + 23 - 25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email: cert@support.renater.fr + ==========================================================