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Red Hat 6.5 RHSA-2016:1207-01 Moderate: glibc DNS Query Flaw

red hat
Calendar Grey June 7, 2016
Scroller Redhat
Security bulletin for glibc minor update resolving DNS request vulnerabilities. Patch for Red Hat Enterprise Linux 6.5 released.
An update for glibc is now available for Red Hat Enterprise Linux 6.5 Advanced Update Support

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

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

For the update to take effect, all services linked to the glibc library must be restarted, or the system rebooted.

Summary

The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the name service cache daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly.
Security Fix(es):
* It was discovered that, under certain circumstances, glibc's getaddrinfo() function would send DNS queries to random file descriptors. An attacker could potentially use this flaw to send DNS queries to unintended recipients, resulting in information disclosure or data loss due to the application encountering corrupted data. (CVE-2013-7423)

Topics%20covered

Topics Covered

security advisory Red Hat Enterprise Linux moderate severity glibc DNS issue security impact

References

https://access.redhat.com/security/cve/CVE-2013-7423 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Server AUS (v. 6.5):
Source: glibc-2.12-1.132.el6_5.8.src.rpm
x86_64: glibc-2.12-1.132.el6_5.8.i686.rpm glibc-2.12-1.132.el6_5.8.x86_64.rpm glibc-common-2.12-1.132.el6_5.8.x86_64.rpm glibc-debuginfo-2.12-1.132.el6_5.8.i686.rpm glibc-debuginfo-2.12-1.132.el6_5.8.x86_64.rpm glibc-debuginfo-common-2.12-1.132.el6_5.8.i686.rpm glibc-debuginfo-common-2.12-1.132.el6_5.8.x86_64.rpm glibc-devel-2.12-1.132.el6_5.8.i686.rpm glibc-devel-2.12-1.132.el6_5.8.x86_64.rpm glibc-headers-2.12-1.132.el6_5.8.x86_64.rpm glibc-utils-2.12-1.132.el6_5.8.x86_64.rpm nscd-2.12-1.132.el6_5.8.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 6.5):
Source: glibc-2.12-1.132.el6_5.8.src.rpm
x86_64: glibc-debuginfo-2.12-1.132.el6_5.8.i686.rpm glibc-debuginfo-2.12-1.132.el6_5.8.x86_64.rpm glibc-debuginfo-common-2.12-1.132.el6_5.8.i686.rpm glibc-debuginfo-common-2.12-1.132.el6_5.8.x86_64.rpm glibc-static-2.12-1.132.el6_5.8.i686.rpm glibc-static-2.12-1.132.el6_5.8.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/


Advisory ID: RHSA-2016:1207-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:1207
Issue date: 2016-06-07

Topic

An update for glibc is now available for Red Hat Enterprise Linux 6.5Advanced Update Support.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat Enterprise Linux moderate severity glibc DNS issue security impact

Relevant Releases Architectures

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

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

Bugs Fixed

1187109 - CVE-2013-7423 glibc: getaddrinfo() writes DNS queries to random file descriptors under high load

1339960 - CVE-2013-7423 glibc: getaddrinfo() sends DNS queries to random file descriptors [rhel-6.5.z]

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