RedHat: RHSA-2016-0175:01 Critical: glibc security and bug fix update
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.
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. (BZ#1291270)
* 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. (BZ#1301625)
All glibc users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues.
Summary
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
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 Desktop (v. 6):
Source:
glibc-2.12-1.166.el6_7.7.src.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
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
Red Hat Enterprise Linux Desktop Optional (v. 6):
i386:
glibc-debuginfo-2.12-1.166.el6_7.7.i686.rpm
glibc-debuginfo-common-2.12-1.166.el6_7.7.i686.rpm
glibc-static-2.12-1.166.el6_7.7.i686.rpm
x86_64:
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-static-2.12-1.166.el6_7.7.i686.rpm
glibc-static-2.12-1.166.el6_7.7.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
glibc-2.12-1.166.el6_7.7.src.rpm
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
Red Hat Enterprise Linux HPC Node Optional (v. 6):
x86_64:
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-static-2.12-1.166.el6_7.7.i686.rpm
glibc-static-2.12-1.166.el6_7.7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
glibc-2.12-1.166.el6_7.7.src.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
ppc64:
glibc-2.12-1.166.el6_7.7.ppc.rpm
glibc-2.12-1.166.el6_7.7.ppc64.rpm
glibc-common-2.12-1.166.el6_7.7.ppc64.rpm
glibc-debuginfo-2.12-1.166.el6_7.7.ppc.rpm
glibc-debuginfo-2.12-1.166.el6_7.7.ppc64.rpm
glibc-debuginfo-common-2.12-1.166.el6_7.7.ppc.rpm
glibc-debuginfo-common-2.12-1.166.el6_7.7.ppc64.rpm
glibc-devel-2.12-1.166.el6_7.7.ppc.rpm
glibc-devel-2.12-1.166.el6_7.7.ppc64.rpm
glibc-headers-2.12-1.166.el6_7.7.ppc64.rpm
glibc-utils-2.12-1.166.el6_7.7.ppc64.rpm
nscd-2.12-1.166.el6_7.7.ppc64.rpm
s390x:
glibc-2.12-1.166.el6_7.7.s390.rpm
glibc-2.12-1.166.el6_7.7.s390x.rpm
glibc-common-2.12-1.166.el6_7.7.s390x.rpm
glibc-debuginfo-2.12-1.166.el6_7.7.s390.rpm
glibc-debuginfo-2.12-1.166.el6_7.7.s390x.rpm
glibc-debuginfo-common-2.12-1.166.el6_7.7.s390.rpm
glibc-debuginfo-common-2.12-1.166.el6_7.7.s390x.rpm
glibc-devel-2.12-1.166.el6_7.7.s390.rpm
glibc-devel-2.12-1.166.el6_7.7.s390x.rpm
glibc-headers-2.12-1.166.el6_7.7.s390x.rpm
glibc-utils-2.12-1.166.el6_7.7.s390x.rpm
nscd-2.12-1.166.el6_7.7.s390x.rpm
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
Red Hat Enterprise Linux Server Optional (v. 6):
i386:
glibc-debuginfo-2.12-1.166.el6_7.7.i686.rpm
glibc-debuginfo-common-2.12-1.166.el6_7.7.i686.rpm
glibc-static-2.12-1.166.el6_7.7.i686.rpm
ppc64:
glibc-debuginfo-2.12-1.166.el6_7.7.ppc.rpm
glibc-debuginfo-2.12-1.166.el6_7.7.ppc64.rpm
glibc-debuginfo-common-2.12-1.166.el6_7.7.ppc.rpm
glibc-debuginfo-common-2.12-1.166.el6_7.7.ppc64.rpm
glibc-static-2.12-1.166.el6_7.7.ppc.rpm
glibc-static-2.12-1.166.el6_7.7.ppc64.rpm
s390x:
glibc-debuginfo-2.12-1.166.el6_7.7.s390.rpm
glibc-debuginfo-2.12-1.166.el6_7.7.s390x.rpm
glibc-debuginfo-common-2.12-1.166.el6_7.7.s390.rpm
glibc-debuginfo-common-2.12-1.166.el6_7.7.s390x.rpm
glibc-static-2.12-1.166.el6_7.7.s390.rpm
glibc-static-2.12-1.166.el6_7.7.s390x.rpm
x86_64:
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-static-2.12-1.166.el6_7.7.i686.rpm
glibc-static-2.12-1.166.el6_7.7.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
glibc-2.12-1.166.el6_7.7.src.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
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
Red Hat Enterprise Linux Workstation Optional (v. 6):
i386:
glibc-debuginfo-2.12-1.166.el6_7.7.i686.rpm
glibc-debuginfo-common-2.12-1.166.el6_7.7.i686.rpm
glibc-static-2.12-1.166.el6_7.7.i686.rpm
x86_64:
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-static-2.12-1.166.el6_7.7.i686.rpm
glibc-static-2.12-1.166.el6_7.7.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/
Topic
Updated glibc packages that fix one security issue and two bugs are nowavailable for Red Hat Enterprise Linux 6.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.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64
Bugs Fixed
1293532 - CVE-2015-7547 glibc: getaddrinfo stack-based buffer overflow