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Red Hat: RHSA-2012:0126-01 Moderate: Glibc Buffer Overflow Issue

red hat
Calendar Grey February 13, 2012
Dist Redhat Esm H88
Important glibc security patch released for CentOS with various corrections targeting critical vulnerabilities.
Updated glibc packages that fix multiple security issues are now available for Red Hat Enterprise Linux 5

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.
An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way the glibc library read timezone files. If a carefully-crafted timezone file was loaded by an application linked against glibc, it could cause the application to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2009-5029)
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)
An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way the glibc library loaded ELF (Executable and Linking Format) files. If a carefully-crafted ELF file was loaded by an application linked against glibc, it could cause the application to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2010-0830)
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)
A denial of service flaw was found in the remote procedure call (RPC) implementation in glibc. A remote attacker able to open a large number of connections to an RPC service that is using the RPC implementation from glibc, could use this flaw to make that service use an excessive amount of CPU time. (CVE-2011-4609)
Red Hat would like to thank the Ubuntu Security Team for reporting CVE-2010-0830, and Dan Rosenberg for reporting CVE-2011-1089. The Ubuntu Security Team acknowledges Dan Rosenberg as the original reporter of CVE-2010-0830.
Users should upgrade to these updated packages, which resolve these issues.

Topics%20covered

Topics Covered

security advisory security update Red Hat buffer overflow moderate severity glibc integer overflow

References

https://access.redhat.com/security/cve/CVE-2009-5029 https://access.redhat.com/security/cve/CVE-2009-5064 https://access.redhat.com/security/cve/CVE-2010-0830 https://access.redhat.com/security/cve/CVE-2011-1089 https://access.redhat.com/security/cve/CVE-2011-4609 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: glibc-2.5-65.el5_7.3.i386.rpm glibc-2.5-65.el5_7.3.i686.rpm glibc-common-2.5-65.el5_7.3.i386.rpm glibc-debuginfo-2.5-65.el5_7.3.i386.rpm glibc-debuginfo-2.5-65.el5_7.3.i686.rpm glibc-debuginfo-common-2.5-65.el5_7.3.i386.rpm glibc-devel-2.5-65.el5_7.3.i386.rpm glibc-headers-2.5-65.el5_7.3.i386.rpm glibc-utils-2.5-65.el5_7.3.i386.rpm nscd-2.5-65.el5_7.3.i386.rpm
x86_64: glibc-2.5-65.el5_7.3.i686.rpm glibc-2.5-65.el5_7.3.x86_64.rpm glibc-common-2.5-65.el5_7.3.x86_64.rpm glibc-debuginfo-2.5-65.el5_7.3.i386.rpm glibc-debuginfo-2.5-65.el5_7.3.i686.rpm glibc-debuginfo-2.5-65.el5_7.3.x86_64.rpm glibc-debuginfo-common-2.5-65.el5_7.3.i386.rpm glibc-devel-2.5-65.el5_7.3.i386.rpm glibc-devel-2.5-65.el5_7.3.x86_64.rpm glibc-headers-2.5-65.el5_7.3.x86_64.rpm glibc-utils-2.5-65.el5_7.3.x86_64.rpm nscd-2.5-65.el5_7.3.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: glibc-2.5-65.el5_7.3.i386.rpm glibc-2.5-65.el5_7.3.i686.rpm glibc-common-2.5-65.el5_7.3.i386.rpm glibc-debuginfo-2.5-65.el5_7.3.i386.rpm glibc-debuginfo-2.5-65.el5_7.3.i686.rpm glibc-debuginfo-common-2.5-65.el5_7.3.i386.rpm glibc-devel-2.5-65.el5_7.3.i386.rpm glibc-headers-2.5-65.el5_7.3.i386.rpm glibc-utils-2.5-65.el5_7.3.i386.rpm

Read the Full Advisory


Advisory ID: RHSA-2012:0126-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2012:0126.html
Issue date: 2012-02-13

Topic

Updated glibc packages that fix multiple security issues are now availablefor Red Hat Enterprise Linux 5.The Red Hat Security Response Team has rated this update as having moderatesecurity 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 security update Red Hat buffer overflow moderate severity glibc integer overflow

Relevant Releases Architectures

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Bugs Fixed

599056 - CVE-2010-0830 glibc: ld.so d_tag signedness error in elf_get_dynamic_info

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

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

761245 - CVE-2009-5029 glibc: __tzfile_read integer overflow to buffer overflow

767299 - CVE-2011-4609 glibc: svc_run() produces high cpu usage when accept() fails with EMFILE error

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