[RHSA-2010:0872-02] Important: glibc security and bug fix update

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Red Hat Security Advisory

 

Synopsis: Important: glibc security and bug fix update

Advisory ID: RHSA-2010:0872-02

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2010-0872.html

Issue date: 2010-11-10

CVE Names: CVE-2010-3847 CVE-2010-3856

=====================================================================

 

1. Summary:

 

Updated glibc packages that fix two security issues and two bugs are now

available for Red Hat Enterprise Linux 6.

 

The Red Hat Security Response Team has rated this update as having

important 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 contain the standard C libraries used by multiple

programs on the system. These packages contain the standard C and the

standard math libraries. Without these two libraries, a Linux system

cannot function properly.

 

It was discovered that the glibc dynamic linker/loader did not handle the

$ORIGIN dynamic string token set in the LD_AUDIT environment variable

securely. A local attacker with write access to a file system containing

setuid or setgid binaries could use this flaw to escalate their privileges.

(CVE-2010-3847)

 

It was discovered that the glibc dynamic linker/loader did not perform

sufficient safety checks when loading dynamic shared objects (DSOs) to

provide callbacks for its auditing API during the execution of privileged

programs. A local attacker could use this flaw to escalate their privileges

via a carefully-chosen system DSO library containing unsafe constructors.

(CVE-2010-3856)

 

Red Hat would like to thank Tavis Ormandy for reporting the CVE-2010-3847

issue, and Ben Hawkes and Tavis Ormandy for reporting the CVE-2010-3856

issue.

 

This update also fixes the following bugs:

 

* Previously, the generic implementation of the strstr() and memmem()

functions did not handle certain periodic patterns correctly and could find

a false positive match. This error has been fixed, and both functions now

work as expected. (BZ#643341)

 

* The "TCB_ALIGNMENT" value has been increased to 32 bytes to prevent

applications from crashing during symbol resolution on 64-bit systems with

support for Intel AVX vector registers. (BZ#643343)

 

All users are advised to upgrade to these updated packages, which contain

backported patches to correct 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/kb/docs/DOC-11259

 

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

 

643306 - CVE-2010-3847 glibc: ld.so insecure handling of $ORIGIN in LD_AUDIT for setuid/setgid programs

643341 - memmem, strstr, and strcasestr are broken

643343 - [intel 6.0 Bug] Dynamic linker failed to align TCB for AVX

645672 - CVE-2010-3856 glibc: ld.so arbitrary DSO loading via LD_AUDIT in setuid/setgid programs

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/glibc-2.12-1.7.el6_0.3.src.rpm

 

i386:

glibc-2.12-1.7.el6_0.3.i686.rpm

glibc-common-2.12-1.7.el6_0.3.i686.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.i686.rpm

glibc-devel-2.12-1.7.el6_0.3.i686.rpm

glibc-headers-2.12-1.7.el6_0.3.i686.rpm

glibc-utils-2.12-1.7.el6_0.3.i686.rpm

nscd-2.12-1.7.el6_0.3.i686.rpm

 

x86_64:

glibc-2.12-1.7.el6_0.3.i686.rpm

glibc-2.12-1.7.el6_0.3.x86_64.rpm

glibc-common-2.12-1.7.el6_0.3.x86_64.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.i686.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.x86_64.rpm

glibc-devel-2.12-1.7.el6_0.3.i686.rpm

glibc-devel-2.12-1.7.el6_0.3.x86_64.rpm

glibc-headers-2.12-1.7.el6_0.3.x86_64.rpm

glibc-utils-2.12-1.7.el6_0.3.x86_64.rpm

nscd-2.12-1.7.el6_0.3.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-2.12-1.7.el6_0.3.src.rpm

 

i386:

glibc-debuginfo-2.12-1.7.el6_0.3.i686.rpm

glibc-static-2.12-1.7.el6_0.3.i686.rpm

 

x86_64:

glibc-debuginfo-2.12-1.7.el6_0.3.x86_64.rpm

glibc-static-2.12-1.7.el6_0.3.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-2.12-1.7.el6_0.3.src.rpm

 

x86_64:

glibc-2.12-1.7.el6_0.3.i686.rpm

glibc-2.12-1.7.el6_0.3.x86_64.rpm

glibc-common-2.12-1.7.el6_0.3.x86_64.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.i686.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.x86_64.rpm

glibc-devel-2.12-1.7.el6_0.3.i686.rpm

glibc-devel-2.12-1.7.el6_0.3.x86_64.rpm

glibc-headers-2.12-1.7.el6_0.3.x86_64.rpm

glibc-utils-2.12-1.7.el6_0.3.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-2.12-1.7.el6_0.3.src.rpm

 

x86_64:

glibc-debuginfo-2.12-1.7.el6_0.3.x86_64.rpm

glibc-static-2.12-1.7.el6_0.3.x86_64.rpm

nscd-2.12-1.7.el6_0.3.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/glibc-2.12-1.7.el6_0.3.src.rpm

 

i386:

glibc-2.12-1.7.el6_0.3.i686.rpm

glibc-common-2.12-1.7.el6_0.3.i686.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.i686.rpm

glibc-devel-2.12-1.7.el6_0.3.i686.rpm

glibc-headers-2.12-1.7.el6_0.3.i686.rpm

glibc-utils-2.12-1.7.el6_0.3.i686.rpm

nscd-2.12-1.7.el6_0.3.i686.rpm

 

ppc64:

glibc-2.12-1.7.el6_0.3.ppc.rpm

glibc-2.12-1.7.el6_0.3.ppc64.rpm

glibc-common-2.12-1.7.el6_0.3.ppc64.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.ppc.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.ppc64.rpm

glibc-devel-2.12-1.7.el6_0.3.ppc.rpm

glibc-devel-2.12-1.7.el6_0.3.ppc64.rpm

glibc-headers-2.12-1.7.el6_0.3.ppc64.rpm

glibc-utils-2.12-1.7.el6_0.3.ppc64.rpm

nscd-2.12-1.7.el6_0.3.ppc64.rpm

 

s390x:

glibc-2.12-1.7.el6_0.3.s390.rpm

glibc-2.12-1.7.el6_0.3.s390x.rpm

glibc-common-2.12-1.7.el6_0.3.s390x.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.s390.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.s390x.rpm

glibc-devel-2.12-1.7.el6_0.3.s390.rpm

glibc-devel-2.12-1.7.el6_0.3.s390x.rpm

glibc-headers-2.12-1.7.el6_0.3.s390x.rpm

glibc-utils-2.12-1.7.el6_0.3.s390x.rpm

nscd-2.12-1.7.el6_0.3.s390x.rpm

 

x86_64:

glibc-2.12-1.7.el6_0.3.i686.rpm

glibc-2.12-1.7.el6_0.3.x86_64.rpm

glibc-common-2.12-1.7.el6_0.3.x86_64.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.i686.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.x86_64.rpm

glibc-devel-2.12-1.7.el6_0.3.i686.rpm

glibc-devel-2.12-1.7.el6_0.3.x86_64.rpm

glibc-headers-2.12-1.7.el6_0.3.x86_64.rpm

glibc-utils-2.12-1.7.el6_0.3.x86_64.rpm

nscd-2.12-1.7.el6_0.3.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-2.12-1.7.el6_0.3.src.rpm

 

i386:

glibc-debuginfo-2.12-1.7.el6_0.3.i686.rpm

glibc-static-2.12-1.7.el6_0.3.i686.rpm

 

ppc64:

glibc-debuginfo-2.12-1.7.el6_0.3.ppc64.rpm

glibc-static-2.12-1.7.el6_0.3.ppc64.rpm

 

s390x:

glibc-debuginfo-2.12-1.7.el6_0.3.s390x.rpm

glibc-static-2.12-1.7.el6_0.3.s390x.rpm

 

x86_64:

glibc-debuginfo-2.12-1.7.el6_0.3.x86_64.rpm

glibc-static-2.12-1.7.el6_0.3.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/glibc-2.12-1.7.el6_0.3.src.rpm

 

i386:

glibc-2.12-1.7.el6_0.3.i686.rpm

glibc-common-2.12-1.7.el6_0.3.i686.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.i686.rpm

glibc-devel-2.12-1.7.el6_0.3.i686.rpm

glibc-headers-2.12-1.7.el6_0.3.i686.rpm

glibc-utils-2.12-1.7.el6_0.3.i686.rpm

nscd-2.12-1.7.el6_0.3.i686.rpm

 

x86_64:

glibc-2.12-1.7.el6_0.3.i686.rpm

glibc-2.12-1.7.el6_0.3.x86_64.rpm

glibc-common-2.12-1.7.el6_0.3.x86_64.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.i686.rpm

glibc-debuginfo-2.12-1.7.el6_0.3.x86_64.rpm

glibc-devel-2.12-1.7.el6_0.3.i686.rpm

glibc-devel-2.12-1.7.el6_0.3.x86_64.rpm

glibc-headers-2.12-1.7.el6_0.3.x86_64.rpm

glibc-utils-2.12-1.7.el6_0.3.x86_64.rpm

nscd-2.12-1.7.el6_0.3.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-2.12-1.7.el6_0.3.src.rpm

 

i386:

glibc-debuginfo-2.12-1.7.el6_0.3.i686.rpm

glibc-static-2.12-1.7.el6_0.3.i686.rpm

 

x86_64:

glibc-debuginfo-2.12-1.7.el6_0.3.x86_64.rpm

glibc-static-2.12-1.7.el6_0.3.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://www.redhat.com/security/team/key/#package

 

7. References:

 

https://www.redhat.com/security/data/cve/CVE-2010-3847.html

https://www.redhat.com/security/data/cve/CVE-2010-3856.html

http://www.redhat.com/security/updates/classification/#important

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://www.redhat.com/security/team/contact/

 

Copyright 2010 Red Hat, Inc.

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