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Ubuntu Security Notice USN-3124-1: Important libpam Vulnerability Patch

red hat
Calendar Grey February 16, 2016
Scroller Redhat
Important glibc security patch for CentOS addresses a buffer overflow vulnerability and recommends swift measures for system administrators.
Updated glibc packages that fix one security issue are now available for Red Hat Enterprise Linux 6.2, 6.4, and 6.5 Advanced Update Support, and Red Hat Enterprise Linux 6.6 and 7....

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

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 stack-based buffer overflow was found in the way the libresolv library performed dual A/AAAA DNS queries. A remote attacker could create a specially crafted DNS response which could cause libresolv to crash or, potentially, execute code with the permissions of the user running the library. Note: this issue is only exposed when libresolv is called from the nss_dns NSS service module. (CVE-2015-7547)
This issue was discovered by the Google Security Team and Red Hat.
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 security issue Red Hat update buffer overflow critical glibc

References

https://access.redhat.com/security/cve/CVE-2015-7547 https://access.redhat.com/security/updates/classification#critical https://access.redhat.com/articles/2161461

Package List

Red Hat Enterprise Linux HPC Node EUS (v. 6.6):
Source: glibc-2.12-1.149.el6_6.11.src.rpm
x86_64: glibc-2.12-1.149.el6_6.11.i686.rpm glibc-2.12-1.149.el6_6.11.x86_64.rpm glibc-common-2.12-1.149.el6_6.11.x86_64.rpm glibc-debuginfo-2.12-1.149.el6_6.11.i686.rpm glibc-debuginfo-2.12-1.149.el6_6.11.x86_64.rpm glibc-debuginfo-common-2.12-1.149.el6_6.11.i686.rpm glibc-debuginfo-common-2.12-1.149.el6_6.11.x86_64.rpm glibc-devel-2.12-1.149.el6_6.11.i686.rpm glibc-devel-2.12-1.149.el6_6.11.x86_64.rpm glibc-headers-2.12-1.149.el6_6.11.x86_64.rpm glibc-utils-2.12-1.149.el6_6.11.x86_64.rpm nscd-2.12-1.149.el6_6.11.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6):
x86_64: glibc-debuginfo-2.12-1.149.el6_6.11.i686.rpm glibc-debuginfo-2.12-1.149.el6_6.11.x86_64.rpm glibc-debuginfo-common-2.12-1.149.el6_6.11.i686.rpm glibc-debuginfo-common-2.12-1.149.el6_6.11.x86_64.rpm glibc-static-2.12-1.149.el6_6.11.i686.rpm glibc-static-2.12-1.149.el6_6.11.x86_64.rpm
Red Hat Enterprise Linux Server AUS (v. 6.2):
Source: glibc-2.12-1.47.el6_2.17.src.rpm
x86_64: glibc-2.12-1.47.el6_2.17.i686.rpm glibc-2.12-1.47.el6_2.17.x86_64.rpm glibc-common-2.12-1.47.el6_2.17.x86_64.rpm glibc-debuginfo-2.12-1.47.el6_2.17.i686.rpm glibc-debuginfo-2.12-1.47.el6_2.17.x86_64.rpm

Read the Full Advisory


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:0225-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:0225.html
Issue date: 2016-02-16

Topic

Updated glibc packages that fix one security issue are now available forRed Hat Enterprise Linux 6.2, 6.4, and 6.5 Advanced Update Support, and RedHat Enterprise Linux 6.6 and 7.1 Extended Update 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 security issue Red Hat update buffer overflow critical glibc

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.1) - x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1) - x86_64

Red Hat Enterprise Linux HPC Node EUS (v. 6.6) - x86_64

Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6) - x86_64

Red Hat Enterprise Linux Server AUS (v. 6.2) - x86_64

Red Hat Enterprise Linux Server AUS (v. 6.4) - x86_64

Red Hat Enterprise Linux Server AUS (v. 6.5) - x86_64

Red Hat Enterprise Linux Server EUS (v. 6.6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server EUS (v. 7.1) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 6.2) - x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 6.4) - x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 6.5) - x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 6.6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.1) - ppc64, ppc64le, s390x, x86_64

Bugs Fixed

1293532 - CVE-2015-7547 glibc: getaddrinfo stack-based buffer overflow

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