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Red Hat: RHSA-2011:1526-03 Low: Glibc Security Fixes and Enhancements

red hat
Calendar Grey December 6, 2011
Dist Redhat Esm H88
Newly released glibc updates address vulnerabilities and introduce improvements for Red Hat Enterprise Linux 6, characterized by a low severity level.
Updated glibc packages that fix two security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 6

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/kb/docs/DOC-11259

Summary

The glibc packages contain the standard C libraries used by multiple programs on the system. These packages contain the standard C and the standard math libraries. Without these two libraries, a Linux system cannot function properly.
A flaw was found in the way the ldd utility identified dynamically linked libraries. If an attacker could trick a user into running ldd on a malicious binary, it could result in arbitrary code execution with the privileges of the user running ldd. (CVE-2009-5064)
It was found that the glibc addmntent() function, used by various mount helper utilities, did not handle certain errors correctly when updating the mtab (mounted file systems table) file. If such utilities had the setuid bit set, a local attacker could use this flaw to corrupt the mtab file. (CVE-2011-1089)
Red Hat would like to thank Dan Rosenberg for reporting the CVE-2011-1089 issue.
This update also fixes several bugs and adds various enhancements. Documentation for these bug fixes and enhancements will be available shortly from the Technical Notes document, linked to in the References section.
Users are advised to upgrade to these updated glibc packages, which contain backported patches to resolve these issues and add these enhancements.

Topics%20covered

Topics Covered

security advisory Red Hat bug fix glibc enhancement low impact C libraries

References

https://access.redhat.com/security/cve/CVE-2009-5064 https://access.redhat.com/security/cve/CVE-2011-1089 https://access.redhat.com/security/updates/classification/#low https://access.redhat.com/search/

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source:
i386: glibc-2.12-1.47.el6.i686.rpm glibc-common-2.12-1.47.el6.i686.rpm glibc-debuginfo-2.12-1.47.el6.i686.rpm glibc-debuginfo-common-2.12-1.47.el6.i686.rpm glibc-devel-2.12-1.47.el6.i686.rpm glibc-headers-2.12-1.47.el6.i686.rpm glibc-utils-2.12-1.47.el6.i686.rpm nscd-2.12-1.47.el6.i686.rpm
x86_64: glibc-2.12-1.47.el6.i686.rpm glibc-2.12-1.47.el6.x86_64.rpm glibc-common-2.12-1.47.el6.x86_64.rpm glibc-debuginfo-2.12-1.47.el6.i686.rpm glibc-debuginfo-2.12-1.47.el6.x86_64.rpm glibc-debuginfo-common-2.12-1.47.el6.i686.rpm glibc-debuginfo-common-2.12-1.47.el6.x86_64.rpm glibc-devel-2.12-1.47.el6.i686.rpm glibc-devel-2.12-1.47.el6.x86_64.rpm glibc-headers-2.12-1.47.el6.x86_64.rpm glibc-utils-2.12-1.47.el6.x86_64.rpm nscd-2.12-1.47.el6.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
i386: glibc-debuginfo-2.12-1.47.el6.i686.rpm glibc-debuginfo-common-2.12-1.47.el6.i686.rpm glibc-static-2.12-1.47.el6.i686.rpm
x86_64: glibc-debuginfo-2.12-1.47.el6.i686.rpm glibc-debuginfo-2.12-1.47.el6.x86_64.rpm glibc-debuginfo-common-2.12-1.47.el6.i686.rpm glibc-debuginfo-common-2.12-1.47.el6.x86_64.rpm glibc-static-2.12-1.47.el6.i686.rpm glibc-static-2.12-1.47.el6.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:


Read the Full Advisory


Severity
low
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2011:1526-03
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:1526.html
Issue date: 2011-12-06

Topic

Updated glibc packages that fix two security issues, several bugs, and addvarious enhancements are now available for Red Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as having lowsecurity impact. Common Vulnerability Scoring System (CVSS) base scores,which give detailed severity ratings, are available for each vulnerabilityfrom the CVE links in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat bug fix glibc enhancement low impact C libraries

Relevant Releases Architectures

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

Bugs Fixed

676467 - glibc-debuginfo.i686 and glibc-debuginfo.x86_64 conflict

688980 - CVE-2011-1089 glibc: Suid mount helpers fail to anticipate RLIMIT_FSIZE

692393 - CVE-2009-5064 glibc: ldd unexpected code execution issue

694386 - POWER4 strncmp crashes reading past zero byte

700507 - nscd start produce USER_AVC

706903 - getpwuid unreliable when using NIS, missing flag: -DUSE_BINDINGDIR=1

711987 - [RHEL-6] statvfs tries to stat unrelated mountpoints

712248 - getconf returns incorrect FILESIZEBITS for Lustre filesystem

713134 - CVE-2009-5064 glibc: ldd unexpected code execution issue [rhel-6.2]

714823 - getaddrinfo returns PTR name in ai_canonname when using DNS

729036 - Debuginfo package issues in glibc

730379 - libresolv is not compiled with the stack protector enabled

731042 - pthread_create dumps core when it fails to set real time policy

736346 - make initgroups (setgroups) thread aware

737778 - setlocale() fails if LC_CTYPE is set to Turkish locale

738665 - strange pthread/fork deadlock

738763 - need to add IP_MULTICAST_ALL option to glibc headers739184 - Statically-linked binaries that call gethostbyname crash when executed.

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