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[RHSA-2014:2023-01] Moderate: glibc security and bug fix update

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Red Hat Security Advisory

 

Synopsis: Moderate: glibc security and bug fix update

Advisory ID: RHSA-2014:2023-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-2023.html

Issue date: 2014-12-18

CVE Names: CVE-2014-7817

=====================================================================

 

1. Summary:

 

Updated glibc packages that fix one security issue and one bug are now

available for Red Hat Enterprise Linux 7.

 

Red Hat Product Security has rated this update as having Moderate security

impact. Common Vulnerability Scoring System (CVSS) base scores, which give

detailed severity ratings, are available for each vulnerability from the

CVE links in the References section.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

 

3. Description:

 

The glibc packages provide the standard C libraries (libc), POSIX thread

libraries (libpthread), standard math libraries (libm), and the Name

Server Caching Daemon (nscd) used by multiple programs on the system.

Without these libraries, the Linux system cannot function correctly.

 

It was found that the wordexp() function would perform command substitution

even when the WRDE_NOCMD flag was specified. An attacker able to provide

specially crafted input to an application using the wordexp() function, and

not sanitizing the input correctly, could potentially use this flaw to

execute arbitrary commands with the credentials of the user running that

application. (CVE-2014-7817)

 

This issue was discovered by Tim Waugh of the Red Hat Developer Experience

Team.

 

This update also fixes the following bug:

 

* Prior to this update, if a file stream that was opened in append mode and

its underlying file descriptor were used at the same time and the file was

truncated using the ftruncate() function on the file descriptor, a

subsequent ftell() call on the stream incorrectly modified the file offset

by seeking to the new end of the file. This update ensures that ftell()

modifies the state of the file stream only when it is in append mode and

its buffer is not empty. As a result, the described incorrect changes to

the file offset no longer occur. (BZ#1170187)

 

All glibc users are advised to upgrade to these updated packages, which

contain backported patches to correct these issues.

 

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/knowledge/articles/11258

 

5. Bugs fixed (https://bugzilla.redhat.com/):

 

1157689 - CVE-2014-7817 glibc: command execution in wordexp() with WRDE_NOCMD specified

1170187 - Problems when using ftruncate on files opened in append mode

 

6. Package List:

 

Red Hat Enterprise Linux Client (v. 7):

 

Source:

glibc-2.17-55.el7_0.3.src.rpm

 

x86_64:

glibc-2.17-55.el7_0.3.i686.rpm

glibc-2.17-55.el7_0.3.x86_64.rpm

glibc-common-2.17-55.el7_0.3.x86_64.rpm

glibc-debuginfo-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-2.17-55.el7_0.3.x86_64.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.x86_64.rpm

glibc-devel-2.17-55.el7_0.3.i686.rpm

glibc-devel-2.17-55.el7_0.3.x86_64.rpm

glibc-headers-2.17-55.el7_0.3.x86_64.rpm

glibc-utils-2.17-55.el7_0.3.x86_64.rpm

nscd-2.17-55.el7_0.3.x86_64.rpm

 

Red Hat Enterprise Linux Client Optional (v. 7):

 

x86_64:

glibc-debuginfo-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-2.17-55.el7_0.3.x86_64.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.x86_64.rpm

glibc-static-2.17-55.el7_0.3.i686.rpm

glibc-static-2.17-55.el7_0.3.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode (v. 7):

 

Source:

glibc-2.17-55.el7_0.3.src.rpm

 

x86_64:

glibc-2.17-55.el7_0.3.i686.rpm

glibc-2.17-55.el7_0.3.x86_64.rpm

glibc-common-2.17-55.el7_0.3.x86_64.rpm

glibc-debuginfo-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-2.17-55.el7_0.3.x86_64.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.x86_64.rpm

glibc-devel-2.17-55.el7_0.3.i686.rpm

glibc-devel-2.17-55.el7_0.3.x86_64.rpm

glibc-headers-2.17-55.el7_0.3.x86_64.rpm

glibc-utils-2.17-55.el7_0.3.x86_64.rpm

nscd-2.17-55.el7_0.3.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

 

x86_64:

glibc-debuginfo-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-2.17-55.el7_0.3.x86_64.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.x86_64.rpm

glibc-static-2.17-55.el7_0.3.i686.rpm

glibc-static-2.17-55.el7_0.3.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 7):

 

Source:

glibc-2.17-55.el7_0.3.src.rpm

 

ppc64:

glibc-2.17-55.el7_0.3.ppc.rpm

glibc-2.17-55.el7_0.3.ppc64.rpm

glibc-common-2.17-55.el7_0.3.ppc64.rpm

glibc-debuginfo-2.17-55.el7_0.3.ppc.rpm

glibc-debuginfo-2.17-55.el7_0.3.ppc64.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.ppc.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.ppc64.rpm

glibc-devel-2.17-55.el7_0.3.ppc.rpm

glibc-devel-2.17-55.el7_0.3.ppc64.rpm

glibc-headers-2.17-55.el7_0.3.ppc64.rpm

glibc-utils-2.17-55.el7_0.3.ppc64.rpm

nscd-2.17-55.el7_0.3.ppc64.rpm

 

s390x:

glibc-2.17-55.el7_0.3.s390.rpm

glibc-2.17-55.el7_0.3.s390x.rpm

glibc-common-2.17-55.el7_0.3.s390x.rpm

glibc-debuginfo-2.17-55.el7_0.3.s390.rpm

glibc-debuginfo-2.17-55.el7_0.3.s390x.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.s390.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.s390x.rpm

glibc-devel-2.17-55.el7_0.3.s390.rpm

glibc-devel-2.17-55.el7_0.3.s390x.rpm

glibc-headers-2.17-55.el7_0.3.s390x.rpm

glibc-utils-2.17-55.el7_0.3.s390x.rpm

nscd-2.17-55.el7_0.3.s390x.rpm

 

x86_64:

glibc-2.17-55.el7_0.3.i686.rpm

glibc-2.17-55.el7_0.3.x86_64.rpm

glibc-common-2.17-55.el7_0.3.x86_64.rpm

glibc-debuginfo-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-2.17-55.el7_0.3.x86_64.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.x86_64.rpm

glibc-devel-2.17-55.el7_0.3.i686.rpm

glibc-devel-2.17-55.el7_0.3.x86_64.rpm

glibc-headers-2.17-55.el7_0.3.x86_64.rpm

glibc-utils-2.17-55.el7_0.3.x86_64.rpm

nscd-2.17-55.el7_0.3.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional (v. 7):

 

ppc64:

glibc-debuginfo-2.17-55.el7_0.3.ppc.rpm

glibc-debuginfo-2.17-55.el7_0.3.ppc64.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.ppc.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.ppc64.rpm

glibc-static-2.17-55.el7_0.3.ppc.rpm

glibc-static-2.17-55.el7_0.3.ppc64.rpm

 

s390x:

glibc-debuginfo-2.17-55.el7_0.3.s390.rpm

glibc-debuginfo-2.17-55.el7_0.3.s390x.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.s390.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.s390x.rpm

glibc-static-2.17-55.el7_0.3.s390.rpm

glibc-static-2.17-55.el7_0.3.s390x.rpm

 

x86_64:

glibc-debuginfo-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-2.17-55.el7_0.3.x86_64.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.x86_64.rpm

glibc-static-2.17-55.el7_0.3.i686.rpm

glibc-static-2.17-55.el7_0.3.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 7):

 

Source:

glibc-2.17-55.el7_0.3.src.rpm

 

x86_64:

glibc-2.17-55.el7_0.3.i686.rpm

glibc-2.17-55.el7_0.3.x86_64.rpm

glibc-common-2.17-55.el7_0.3.x86_64.rpm

glibc-debuginfo-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-2.17-55.el7_0.3.x86_64.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.x86_64.rpm

glibc-devel-2.17-55.el7_0.3.i686.rpm

glibc-devel-2.17-55.el7_0.3.x86_64.rpm

glibc-headers-2.17-55.el7_0.3.x86_64.rpm

glibc-utils-2.17-55.el7_0.3.x86_64.rpm

nscd-2.17-55.el7_0.3.x86_64.rpm

 

Red Hat Enterprise Linux Workstation Optional (v. 7):

 

x86_64:

glibc-debuginfo-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-2.17-55.el7_0.3.x86_64.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.i686.rpm

glibc-debuginfo-common-2.17-55.el7_0.3.x86_64.rpm

glibc-static-2.17-55.el7_0.3.i686.rpm

glibc-static-2.17-55.el7_0.3.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/

 

7. References:

 

https://access.redhat.com/security/cve/CVE-2014-7817

https://access.redhat.com/security/updates/classification/#moderate

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2014 Red Hat, Inc.

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