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[RHSA-2015:0327-02] 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-2015:0327-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-0327.html

Issue date: 2015-03-05

CVE Names: CVE-2014-6040 CVE-2014-8121

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

 

1. Summary:

 

Updated glibc packages that fix two security issues and several bugs 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.

 

An out-of-bounds read flaw was found in the way glibc's iconv() function

converted certain encoded data to UTF-8. An attacker able to make an

application call the iconv() function with a specially crafted argument

could use this flaw to crash that application. (CVE-2014-6040)

 

It was found that the files back end of Name Service Switch (NSS) did not

isolate iteration over an entire database from key-based look-up API calls.

An application performing look-ups on a database while iterating over it

could enter an infinite loop, leading to a denial of service.

(CVE-2014-8121)

 

This update also fixes the following bugs:

 

* Due to problems with buffer extension and reallocation, the nscd daemon

terminated unexpectedly with a segmentation fault when processing long

netgroup entries. With this update, the handling of long netgroup entries

has been corrected and nscd no longer crashes in the described scenario.

(BZ#1138520)

 

* If a file opened in append mode was truncated with the ftruncate()

function, a subsequent ftell() call could incorrectly modify the file

offset. This update ensures that ftell() modifies the stream state only

when it is in append mode and the buffer for the stream is not empty.

(BZ#1156331)

 

* A defect in the C library headers caused builds with older compilers to

generate incorrect code for the btowc() function in the older compatibility

C++ standard library. Applications calling btowc() in the compatibility C++

standard library became unresponsive. With this update, the C library

headers have been corrected, and the compatibility C++ standard library

shipped with Red Hat Enterprise Linux has been rebuilt. Applications that

rely on the compatibility C++ standard library no longer hang when calling

btowc(). (BZ#1120490)

 

* Previously, when using netgroups and the nscd daemon was set up to cache

netgroup information, the sudo utility denied access to valid users. The

bug in nscd has been fixed, and sudo now works in netgroups as

expected. (BZ#1080766)

 

Users of glibc are advised to upgrade to these updated packages, which fix

these issues.

 

4. Solution:

 

Before applying this update, make sure all previously released errata

relevant to your system have been applied.

 

For details on how to apply this update, refer to:

 

https://access.redhat.com/articles/11258

 

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

 

1103874 - Fix memory fencing error in unwind-forcedunwind.c

1124453 - getconf PATH returns non-directory "/bin"

1135841 - CVE-2014-6040 glibc: crash in code page decoding functions (IBM933, IBM935, IBM937, IBM939, IBM1364)

1138520 - nscd segfaults when running sudo with netgroup caching enabled.

1165192 - CVE-2014-8121 glibc: Unexpected closing of nss_files databases after lookups causes denial of service

 

6. Package List:

 

Red Hat Enterprise Linux Client (v. 7):

 

Source:

glibc-2.17-78.el7.src.rpm

 

x86_64:

glibc-2.17-78.el7.i686.rpm

glibc-2.17-78.el7.x86_64.rpm

glibc-common-2.17-78.el7.x86_64.rpm

glibc-debuginfo-2.17-78.el7.i686.rpm

glibc-debuginfo-2.17-78.el7.x86_64.rpm

glibc-debuginfo-common-2.17-78.el7.i686.rpm

glibc-debuginfo-common-2.17-78.el7.x86_64.rpm

glibc-devel-2.17-78.el7.i686.rpm

glibc-devel-2.17-78.el7.x86_64.rpm

glibc-headers-2.17-78.el7.x86_64.rpm

glibc-utils-2.17-78.el7.x86_64.rpm

nscd-2.17-78.el7.x86_64.rpm

 

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

 

x86_64:

glibc-debuginfo-2.17-78.el7.i686.rpm

glibc-debuginfo-2.17-78.el7.x86_64.rpm

glibc-debuginfo-common-2.17-78.el7.i686.rpm

glibc-debuginfo-common-2.17-78.el7.x86_64.rpm

glibc-static-2.17-78.el7.i686.rpm

glibc-static-2.17-78.el7.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode (v. 7):

 

Source:

glibc-2.17-78.el7.src.rpm

 

x86_64:

glibc-2.17-78.el7.i686.rpm

glibc-2.17-78.el7.x86_64.rpm

glibc-common-2.17-78.el7.x86_64.rpm

glibc-debuginfo-2.17-78.el7.i686.rpm

glibc-debuginfo-2.17-78.el7.x86_64.rpm

glibc-debuginfo-common-2.17-78.el7.i686.rpm

glibc-debuginfo-common-2.17-78.el7.x86_64.rpm

glibc-devel-2.17-78.el7.i686.rpm

glibc-devel-2.17-78.el7.x86_64.rpm

glibc-headers-2.17-78.el7.x86_64.rpm

glibc-utils-2.17-78.el7.x86_64.rpm

nscd-2.17-78.el7.x86_64.rpm

 

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

 

x86_64:

glibc-debuginfo-2.17-78.el7.i686.rpm

glibc-debuginfo-2.17-78.el7.x86_64.rpm

glibc-debuginfo-common-2.17-78.el7.i686.rpm

glibc-debuginfo-common-2.17-78.el7.x86_64.rpm

glibc-static-2.17-78.el7.i686.rpm

glibc-static-2.17-78.el7.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 7):

 

Source:

glibc-2.17-78.el7.src.rpm

 

ppc64:

glibc-2.17-78.el7.ppc.rpm

glibc-2.17-78.el7.ppc64.rpm

glibc-common-2.17-78.el7.ppc64.rpm

glibc-debuginfo-2.17-78.el7.ppc.rpm

glibc-debuginfo-2.17-78.el7.ppc64.rpm

glibc-debuginfo-common-2.17-78.el7.ppc.rpm

glibc-debuginfo-common-2.17-78.el7.ppc64.rpm

glibc-devel-2.17-78.el7.ppc.rpm

glibc-devel-2.17-78.el7.ppc64.rpm

glibc-headers-2.17-78.el7.ppc64.rpm

glibc-utils-2.17-78.el7.ppc64.rpm

nscd-2.17-78.el7.ppc64.rpm

 

s390x:

glibc-2.17-78.el7.s390.rpm

glibc-2.17-78.el7.s390x.rpm

glibc-common-2.17-78.el7.s390x.rpm

glibc-debuginfo-2.17-78.el7.s390.rpm

glibc-debuginfo-2.17-78.el7.s390x.rpm

glibc-debuginfo-common-2.17-78.el7.s390.rpm

glibc-debuginfo-common-2.17-78.el7.s390x.rpm

glibc-devel-2.17-78.el7.s390.rpm

glibc-devel-2.17-78.el7.s390x.rpm

glibc-headers-2.17-78.el7.s390x.rpm

glibc-utils-2.17-78.el7.s390x.rpm

nscd-2.17-78.el7.s390x.rpm

 

x86_64:

glibc-2.17-78.el7.i686.rpm

glibc-2.17-78.el7.x86_64.rpm

glibc-common-2.17-78.el7.x86_64.rpm

glibc-debuginfo-2.17-78.el7.i686.rpm

glibc-debuginfo-2.17-78.el7.x86_64.rpm

glibc-debuginfo-common-2.17-78.el7.i686.rpm

glibc-debuginfo-common-2.17-78.el7.x86_64.rpm

glibc-devel-2.17-78.el7.i686.rpm

glibc-devel-2.17-78.el7.x86_64.rpm

glibc-headers-2.17-78.el7.x86_64.rpm

glibc-utils-2.17-78.el7.x86_64.rpm

nscd-2.17-78.el7.x86_64.rpm

 

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

 

ppc64:

glibc-debuginfo-2.17-78.el7.ppc.rpm

glibc-debuginfo-2.17-78.el7.ppc64.rpm

glibc-debuginfo-common-2.17-78.el7.ppc.rpm

glibc-debuginfo-common-2.17-78.el7.ppc64.rpm

glibc-static-2.17-78.el7.ppc.rpm

glibc-static-2.17-78.el7.ppc64.rpm

 

s390x:

glibc-debuginfo-2.17-78.el7.s390.rpm

glibc-debuginfo-2.17-78.el7.s390x.rpm

glibc-debuginfo-common-2.17-78.el7.s390.rpm

glibc-debuginfo-common-2.17-78.el7.s390x.rpm

glibc-static-2.17-78.el7.s390.rpm

glibc-static-2.17-78.el7.s390x.rpm

 

x86_64:

glibc-debuginfo-2.17-78.el7.i686.rpm

glibc-debuginfo-2.17-78.el7.x86_64.rpm

glibc-debuginfo-common-2.17-78.el7.i686.rpm

glibc-debuginfo-common-2.17-78.el7.x86_64.rpm

glibc-static-2.17-78.el7.i686.rpm

glibc-static-2.17-78.el7.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 7):

 

Source:

glibc-2.17-78.el7.src.rpm

 

x86_64:

glibc-2.17-78.el7.i686.rpm

glibc-2.17-78.el7.x86_64.rpm

glibc-common-2.17-78.el7.x86_64.rpm

glibc-debuginfo-2.17-78.el7.i686.rpm

glibc-debuginfo-2.17-78.el7.x86_64.rpm

glibc-debuginfo-common-2.17-78.el7.i686.rpm

glibc-debuginfo-common-2.17-78.el7.x86_64.rpm

glibc-devel-2.17-78.el7.i686.rpm

glibc-devel-2.17-78.el7.x86_64.rpm

glibc-headers-2.17-78.el7.x86_64.rpm

glibc-utils-2.17-78.el7.x86_64.rpm

nscd-2.17-78.el7.x86_64.rpm

 

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

 

x86_64:

glibc-debuginfo-2.17-78.el7.i686.rpm

glibc-debuginfo-2.17-78.el7.x86_64.rpm

glibc-debuginfo-common-2.17-78.el7.i686.rpm

glibc-debuginfo-common-2.17-78.el7.x86_64.rpm

glibc-static-2.17-78.el7.i686.rpm

glibc-static-2.17-78.el7.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-2014-6040

https://access.redhat.com/security/cve/CVE-2014-8121

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 2015 Red Hat, Inc.

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