Synopsis

Important: bash Shift_JIS security update

Type/Severity

Security Advisory: Important

Topic

Updated bash Shift_JIS packages that fix one security issue are now
available for Red Hat Enterprise Linux 5.9 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.

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.

Shift_JIS, also known as "SJIS", is a character encoding for the Japanese
language. This package provides bash support for the Shift_JIS encoding.

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 changes to the way names are handled by this
update. Note that certain services, screen sessions, and tmux sessions may
need to be restarted, and affected interactive users may need to re-login.
Installing these updated packages without restarting services will address
the vulnerability, but functionality may be impacted until affected
services are restarted. 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 users who require Shift_JIS encoding support with Bash built-in
functions are advised to upgrade to these updated packages, which contain a
backported patch to correct this issue.

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

Affected Products

• Red Hat S-JIS Support (for RHEL Server) 5.9 x86_64
• Red Hat S-JIS Support (for RHEL Server) 5.9 ia64
• Red Hat S-JIS Support (for RHEL Server) 5.9 i386

Fixes

• BZ - 1146319 - CVE-2014-7169 bash: code execution via specially-crafted environment (Incomplete fix for CVE-2014-6271)

CVEs

• CVE-2014-7169
• CVE-2014-7186
• CVE-2014-7187

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/articles/1200223

Red Hat S-JIS Support (for RHEL Server) 5.9

SRPM
bash-3.2-32.el5_9.3.sjis.1.src.rpm	SHA-256: c150bedfacbf95f896ba41da7075d8bee28957fbebd7d0cf5e03b44f7da407cd
x86_64
bash-3.2-32.el5_9.3.sjis.1.x86_64.rpm	SHA-256: bf63affcf47e78b65cacfb039280a408ee83c08a9ed0a082e903265a64babcdb
bash-debuginfo-3.2-32.el5_9.3.sjis.1.x86_64.rpm	SHA-256: 0bfe42409529333c9f1e3528fe1a17adba035bf7c5e5f5ce4291ac4567ce9f7c
ia64
bash-3.2-32.el5_9.3.sjis.1.i386.rpm	SHA-256: 0b61a39b24e789125459be9914eedca7bd51d1f36ec20bc83c801709fda3a8a1
bash-3.2-32.el5_9.3.sjis.1.ia64.rpm	SHA-256: 5b50de612353d47f2654305487af079b41dad00dfc0943b8be92116df9746853
bash-debuginfo-3.2-32.el5_9.3.sjis.1.i386.rpm	SHA-256: 585260c3c3077f7d0e67a0b493e66e0b1e98ad60704ea140cd63aaf191255433
bash-debuginfo-3.2-32.el5_9.3.sjis.1.ia64.rpm	SHA-256: 397818a8c7c2fd7ae7b1f89518bca98ab5f6d722c2531a85a089920fbd2b3483
i386
bash-3.2-32.el5_9.3.sjis.1.i386.rpm	SHA-256: 0b61a39b24e789125459be9914eedca7bd51d1f36ec20bc83c801709fda3a8a1
bash-debuginfo-3.2-32.el5_9.3.sjis.1.i386.rpm	SHA-256: 585260c3c3077f7d0e67a0b493e66e0b1e98ad60704ea140cd63aaf191255433