Articles / Red Hat: Security update fo…

Red Hat: Security update for glibc

The glibc packages provide the standard C and standard math libraries used by multiple programs on the system. Without these libraries, the Linux system cannot function properly. Multiple errors in glibc’s formatted printing functionality could allow an attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code using a format string flaw in an application, even though these protections are expected to limit the impact of such flaws to an application abort.

Updated packages are available from ftp.redhat.com.

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=====================================================================
                  Red Hat Security Advisory

Synopsis:          Moderate: glibc security and bug fix update
Advisory ID:       RHSA-2012:1098-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2012-1098.html
Issue date:        2012-07-18
CVE Names:         CVE-2012-3404 CVE-2012-3405 CVE-2012-3406 
=====================================================================

1. Summary:

Updated glibc packages that fix three security issues and one bug are now
available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

2. 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

3. Description:

The glibc packages provide the standard C and standard math libraries used
by multiple programs on the system. Without these libraries, the Linux
system cannot function properly.

Multiple errors in glibc's formatted printing functionality could allow an
attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code
using a format string flaw in an application, even though these protections
are expected to limit the impact of such flaws to an application abort.
(CVE-2012-3404, CVE-2012-3405, CVE-2012-3406)

This update also fixes the following bug:

* A programming error caused an internal array of nameservers to be only
partially initialized when the /etc/resolv.conf file contained IPv6
nameservers. Depending on the contents of a nearby structure, this could
cause certain applications to terminate unexpectedly with a segmentation
fault. The programming error has been fixed, which restores proper behavior
with IPv6 nameservers listed in the /etc/resolv.conf file. (BZ#837026)

All users of glibc are advised to upgrade to these updated packages, which
contain backported patches to fix these issues.

4. 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/knowledge/articles/11258

5. Bugs fixed (http://bugzilla.redhat.com/):

826943 - CVE-2012-3406 glibc: printf() unbound alloca() usage in case of positional parameters + many format specs
833703 - CVE-2012-3404 glibc: incorrect size calculation in formatted printing can lead to FORTIFY_SOURCE format string protection bypass
833704 - CVE-2012-3405 glibc: incorrect use of extend_alloca() in formatted printing can lead to FORTIFY_SOURCE format string protection bypass
837026 - libresolv dumps core when IPv6 address in resolv.conf

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/glibc-2.12-1.80.el6_3.3.src.rpm

i386:
glibc-2.12-1.80.el6_3.3.i686.rpm
glibc-common-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
glibc-devel-2.12-1.80.el6_3.3.i686.rpm
glibc-headers-2.12-1.80.el6_3.3.i686.rpm
glibc-utils-2.12-1.80.el6_3.3.i686.rpm
nscd-2.12-1.80.el6_3.3.i686.rpm

x86_64:
glibc-2.12-1.80.el6_3.3.i686.rpm
glibc-2.12-1.80.el6_3.3.x86_64.rpm
glibc-common-2.12-1.80.el6_3.3.x86_64.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.x86_64.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.x86_64.rpm
glibc-devel-2.12-1.80.el6_3.3.i686.rpm
glibc-devel-2.12-1.80.el6_3.3.x86_64.rpm
glibc-headers-2.12-1.80.el6_3.3.x86_64.rpm
glibc-utils-2.12-1.80.el6_3.3.x86_64.rpm
nscd-2.12-1.80.el6_3.3.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/glibc-2.12-1.80.el6_3.3.src.rpm

i386:
glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
glibc-static-2.12-1.80.el6_3.3.i686.rpm

x86_64:
glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.x86_64.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.x86_64.rpm
glibc-static-2.12-1.80.el6_3.3.i686.rpm
glibc-static-2.12-1.80.el6_3.3.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/glibc-2.12-1.80.el6_3.3.src.rpm

x86_64:
glibc-2.12-1.80.el6_3.3.i686.rpm
glibc-2.12-1.80.el6_3.3.x86_64.rpm
glibc-common-2.12-1.80.el6_3.3.x86_64.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.x86_64.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.x86_64.rpm
glibc-devel-2.12-1.80.el6_3.3.i686.rpm
glibc-devel-2.12-1.80.el6_3.3.x86_64.rpm
glibc-headers-2.12-1.80.el6_3.3.x86_64.rpm
glibc-utils-2.12-1.80.el6_3.3.x86_64.rpm
nscd-2.12-1.80.el6_3.3.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/glibc-2.12-1.80.el6_3.3.src.rpm

x86_64:
glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.x86_64.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.x86_64.rpm
glibc-static-2.12-1.80.el6_3.3.i686.rpm
glibc-static-2.12-1.80.el6_3.3.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/glibc-2.12-1.80.el6_3.3.src.rpm

i386:
glibc-2.12-1.80.el6_3.3.i686.rpm
glibc-common-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
glibc-devel-2.12-1.80.el6_3.3.i686.rpm
glibc-headers-2.12-1.80.el6_3.3.i686.rpm
glibc-utils-2.12-1.80.el6_3.3.i686.rpm
nscd-2.12-1.80.el6_3.3.i686.rpm

ppc64:
glibc-2.12-1.80.el6_3.3.ppc.rpm
glibc-2.12-1.80.el6_3.3.ppc64.rpm
glibc-common-2.12-1.80.el6_3.3.ppc64.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.ppc.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.ppc64.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.ppc.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.ppc64.rpm
glibc-devel-2.12-1.80.el6_3.3.ppc.rpm
glibc-devel-2.12-1.80.el6_3.3.ppc64.rpm
glibc-headers-2.12-1.80.el6_3.3.ppc64.rpm
glibc-utils-2.12-1.80.el6_3.3.ppc64.rpm
nscd-2.12-1.80.el6_3.3.ppc64.rpm

s390x:
glibc-2.12-1.80.el6_3.3.s390.rpm
glibc-2.12-1.80.el6_3.3.s390x.rpm
glibc-common-2.12-1.80.el6_3.3.s390x.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.s390.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.s390x.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.s390.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.s390x.rpm
glibc-devel-2.12-1.80.el6_3.3.s390.rpm
glibc-devel-2.12-1.80.el6_3.3.s390x.rpm
glibc-headers-2.12-1.80.el6_3.3.s390x.rpm
glibc-utils-2.12-1.80.el6_3.3.s390x.rpm
nscd-2.12-1.80.el6_3.3.s390x.rpm

x86_64:
glibc-2.12-1.80.el6_3.3.i686.rpm
glibc-2.12-1.80.el6_3.3.x86_64.rpm
glibc-common-2.12-1.80.el6_3.3.x86_64.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.x86_64.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.x86_64.rpm
glibc-devel-2.12-1.80.el6_3.3.i686.rpm
glibc-devel-2.12-1.80.el6_3.3.x86_64.rpm
glibc-headers-2.12-1.80.el6_3.3.x86_64.rpm
glibc-utils-2.12-1.80.el6_3.3.x86_64.rpm
nscd-2.12-1.80.el6_3.3.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/glibc-2.12-1.80.el6_3.3.src.rpm

i386:
glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
glibc-static-2.12-1.80.el6_3.3.i686.rpm

ppc64:
glibc-debuginfo-2.12-1.80.el6_3.3.ppc.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.ppc64.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.ppc.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.ppc64.rpm
glibc-static-2.12-1.80.el6_3.3.ppc.rpm
glibc-static-2.12-1.80.el6_3.3.ppc64.rpm

s390x:
glibc-debuginfo-2.12-1.80.el6_3.3.s390.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.s390x.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.s390.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.s390x.rpm
glibc-static-2.12-1.80.el6_3.3.s390.rpm
glibc-static-2.12-1.80.el6_3.3.s390x.rpm

x86_64:
glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.x86_64.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.x86_64.rpm
glibc-static-2.12-1.80.el6_3.3.i686.rpm
glibc-static-2.12-1.80.el6_3.3.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/glibc-2.12-1.80.el6_3.3.src.rpm

i386:
glibc-2.12-1.80.el6_3.3.i686.rpm
glibc-common-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
glibc-devel-2.12-1.80.el6_3.3.i686.rpm
glibc-headers-2.12-1.80.el6_3.3.i686.rpm
glibc-utils-2.12-1.80.el6_3.3.i686.rpm
nscd-2.12-1.80.el6_3.3.i686.rpm

x86_64:
glibc-2.12-1.80.el6_3.3.i686.rpm
glibc-2.12-1.80.el6_3.3.x86_64.rpm
glibc-common-2.12-1.80.el6_3.3.x86_64.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.x86_64.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.x86_64.rpm
glibc-devel-2.12-1.80.el6_3.3.i686.rpm
glibc-devel-2.12-1.80.el6_3.3.x86_64.rpm
glibc-headers-2.12-1.80.el6_3.3.x86_64.rpm
glibc-utils-2.12-1.80.el6_3.3.x86_64.rpm
nscd-2.12-1.80.el6_3.3.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/glibc-2.12-1.80.el6_3.3.src.rpm

i386:
glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
glibc-static-2.12-1.80.el6_3.3.i686.rpm

x86_64:
glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-2.12-1.80.el6_3.3.x86_64.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
glibc-debuginfo-common-2.12-1.80.el6_3.3.x86_64.rpm
glibc-static-2.12-1.80.el6_3.3.i686.rpm
glibc-static-2.12-1.80.el6_3.3.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/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2012-3404.html
https://www.redhat.com/security/data/cve/CVE-2012-3405.html
https://www.redhat.com/security/data/cve/CVE-2012-3406.html
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2012 Red Hat, Inc.
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