Scientific Linux: SLSA-2016:0175-1 Critical: glibc Buffer Overflow

Date: Tue, 16 Feb 2016 19:59:37 +0000
Reply-To: scientific-linux-users@
Sender: Security Errata for Scientific Linux
 
From: Pat Riehecky 
Subject: Security ERRATA Critical: glibc on SL6.x i386/x86_64
MIME-Version: 1.0
Message-ID: <20160216195937.10368.41649@slpackages.fnal.gov>

Synopsis: Critical: glibc security and bug fix update
Advisory ID: SLSA-2016:0175-1
Issue Date: 2016-02-16
CVE Numbers: CVE-2015-7547
--

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 update also fixes the following bugs:

* The dynamic loader has been enhanced to allow the loading of more shared
libraries that make use of static thread local storage. While static
thread local storage is the fastest access mechanism it may also prevent
the shared library from being loaded at all since the static storage space
is a limited and shared process-global resource. Applications which would
previously fail with "dlopen: cannot load any more object with static TLS"
should now start up correctly.

* A bug in the POSIX realtime support would cause asynchronous I/O or
certain timer API calls to fail and return errors in the presence of large
thread-local storage data that exceeded PTHREAD_STACK_MIN in size
(generally 16 KiB). The bug in librt has been corrected and the impacted
APIs no longer return errors when large thread-local storage data is
present in the application.
--

SL6
 x86_64
 glibc-2.12-1.166.el6_7.7.i686.rpm
 glibc-2.12-1.166.el6_7.7.x86_64.rpm
 glibc-common-2.12-1.166.el6_7.7.x86_64.rpm
 glibc-debuginfo-2.12-1.166.el6_7.7.i686.rpm
 glibc-debuginfo-2.12-1.166.el6_7.7.x86_64.rpm
 glibc-debuginfo-common-2.12-1.166.el6_7.7.i686.rpm
 glibc-debuginfo-common-2.12-1.166.el6_7.7.x86_64.rpm
 glibc-devel-2.12-1.166.el6_7.7.i686.rpm
 glibc-devel-2.12-1.166.el6_7.7.x86_64.rpm
 glibc-headers-2.12-1.166.el6_7.7.x86_64.rpm
 glibc-utils-2.12-1.166.el6_7.7.x86_64.rpm
 nscd-2.12-1.166.el6_7.7.x86_64.rpm
 glibc-static-2.12-1.166.el6_7.7.i686.rpm
 glibc-static-2.12-1.166.el6_7.7.x86_64.rpm
 i386
 glibc-2.12-1.166.el6_7.7.i686.rpm
 glibc-common-2.12-1.166.el6_7.7.i686.rpm
 glibc-debuginfo-2.12-1.166.el6_7.7.i686.rpm
 glibc-debuginfo-common-2.12-1.166.el6_7.7.i686.rpm
 glibc-devel-2.12-1.166.el6_7.7.i686.rpm
 glibc-headers-2.12-1.166.el6_7.7.i686.rpm
 glibc-utils-2.12-1.166.el6_7.7.i686.rpm
 nscd-2.12-1.166.el6_7.7.i686.rpm
 glibc-static-2.12-1.166.el6_7.7.i686.rpm

- Scientific Linux Development Team