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Red Hat: RHSA-2015:0101-01 Critical: glibc Heap-Based Buffer Overflow

red hat
Calendar Grey January 28, 2015
Dist Redhat Esm H88
Important patch for glibc released in Red Hat Enterprise Linux addressing a critical buffer overflow vulnerability.
Updated glibc packages that fix one security issue are now available for Red Hat Enterprise Linux 4 Extended Life Cycle Support

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

Summary

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.
A heap-based buffer overflow was found in glibc's __nss_hostname_digits_dots() function, which is used by the gethostbyname() and gethostbyname2() glibc function calls. A remote attacker able to make an application call either of these functions could use this flaw to execute arbitrary code with the permissions of the user running the application. (CVE-2015-0235)
Red Hat would like to thank Qualys for reporting this issue.
All glibc users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue.

Topics%20covered

Topics Covered

security advisory buffer overflow critical Red Hat Enterprise Linux glibc

References

https://access.redhat.com/security/cve/CVE-2015-0235 https://access.redhat.com/security/updates/classification/#critical

Package List

Red Hat Enterprise Linux AS (v. 4 ELS):
Source: glibc-2.3.4-2.57.el4.2.src.rpm
i386: glibc-2.3.4-2.57.el4.2.i386.rpm glibc-2.3.4-2.57.el4.2.i686.rpm glibc-common-2.3.4-2.57.el4.2.i386.rpm glibc-debuginfo-2.3.4-2.57.el4.2.i386.rpm glibc-debuginfo-2.3.4-2.57.el4.2.i686.rpm glibc-debuginfo-common-2.3.4-2.57.el4.2.i386.rpm glibc-devel-2.3.4-2.57.el4.2.i386.rpm glibc-headers-2.3.4-2.57.el4.2.i386.rpm glibc-profile-2.3.4-2.57.el4.2.i386.rpm glibc-utils-2.3.4-2.57.el4.2.i386.rpm nptl-devel-2.3.4-2.57.el4.2.i386.rpm nptl-devel-2.3.4-2.57.el4.2.i686.rpm nscd-2.3.4-2.57.el4.2.i386.rpm
ia64: glibc-2.3.4-2.57.el4.2.i686.rpm glibc-2.3.4-2.57.el4.2.ia64.rpm glibc-common-2.3.4-2.57.el4.2.ia64.rpm glibc-debuginfo-2.3.4-2.57.el4.2.i686.rpm glibc-debuginfo-2.3.4-2.57.el4.2.ia64.rpm glibc-debuginfo-common-2.3.4-2.57.el4.2.i386.rpm glibc-devel-2.3.4-2.57.el4.2.ia64.rpm glibc-headers-2.3.4-2.57.el4.2.ia64.rpm glibc-profile-2.3.4-2.57.el4.2.ia64.rpm glibc-utils-2.3.4-2.57.el4.2.ia64.rpm nptl-devel-2.3.4-2.57.el4.2.ia64.rpm nscd-2.3.4-2.57.el4.2.ia64.rpm
x86_64: glibc-2.3.4-2.57.el4.2.i686.rpm glibc-2.3.4-2.57.el4.2.x86_64.rpm glibc-common-2.3.4-2.57.el4.2.x86_64.rpm glibc-debuginfo-2.3.4-2.57.el4.2.i386.rpm glibc-debuginfo-2.3.4-2.57.el4.2.i686.rpm

Read the Full Advisory


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2015:0101-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2015:0101.html
Issue date: 2015-01-28

Topic

Updated glibc packages that fix one security issue are now available forRed Hat Enterprise Linux 4 Extended Life Cycle Support.Red Hat Product Security has rated this update as having Critical securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Topics%20covered

Topics Covered

security advisory buffer overflow critical Red Hat Enterprise Linux glibc

Relevant Releases Architectures

Red Hat Enterprise Linux AS (v. 4 ELS) - i386, ia64, x86_64

Red Hat Enterprise Linux ES (v. 4 ELS) - i386, ia64, x86_64

Bugs Fixed

1183461 - CVE-2015-0235 glibc: __nss_hostname_digits_dots() heap-based buffer overflow

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