-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2012.0460
                         linux-2.6 security update
                                11 May 2012

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

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           linux-2.6
Publisher:         Debian
Operating System:  Debian GNU/Linux 6
Impact/Access:     Increased Privileges -- Existing Account
                   Denial of Service    -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2012-2133 CVE-2012-2123 CVE-2012-1601
                   CVE-2012-0879 CVE-2011-4086 

Reference:         ESB-2012.0381
                   ESB-2012.0150

Original Bulletin: 
   http://www.debian.org/security/2012/dsa-2469

- --------------------------BEGIN INCLUDED TEXT--------------------

- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- - ----------------------------------------------------------------------
Debian Security Advisory DSA-2469-1                security@debian.org
http://www.debian.org/security/                           Dann Frazier
May 10, 2012                        http://www.debian.org/security/faq
- - ----------------------------------------------------------------------

Package        : linux-2.6
Vulnerability  : privilege escalation/denial of service
Problem type   : local
Debian-specific: no
CVE Id(s)      : CVE-2011-4086 CVE-2012-0879 CVE-2012-1601 CVE-2012-2123
                 CVE-2012-2133

Several vulnerabilities have been discovered in the Linux kernel that may lead
to a denial of service or privilege escalation. The Common Vulnerabilities and
Exposures project identifies the following problems:

CVE-2011-4086

    Eric Sandeen reported an issue in the journaling layer for EXT4 filesystems
    (jbd2). Local users can cause buffers to be accessed after they have been
    torn down, resulting in a denial of service (DoS) due to a system crash.

CVE-2012-0879

    Louis Rilling reported two reference counting issues in the CLONE_IO
    feature of the kernel. Local users can prevent io context structures
    from being freed, resulting in a denial of service.

CVE-2012-1601

    Michael Ellerman reported an issue in the KVM subsystem. Local users could
    cause a denial of service (NULL pointer dereference) by creating VCPUs
    before a call to KVM_CREATE_IRQCHIP.

CVE-2012-2123

    Steve Grubb reported in an issue in fcaps, a filesystem-based capabilities
    system. Personality flags set using this mechanism, such as the disabling
    of address space randomization, may persist across suid calls.

CVE-2012-2133

    Shachar Raindel discovered a use-after-free bug in the hugepages
    quota implementation. Local users with permission to use hugepages
    via the hugetlbfs implementation may be able to cause a denial of
    service (system crash).

For the stable distribution (squeeze), this problem has been fixed in version
2.6.32-44. Updates are currently only available for the amd64, i386 and sparc
ports.

NOTE: Updated linux-2.6 packages will also be made available in the release
of Debian 6.0.5, scheduled to take place the weekend of 2012.05.12. This
pending update will be version 2.6.32-45, and provides an additional fix for
build failures on some architectures. Users for whom this update is not
critical, and who may wish to avoid multiple reboots, should consider waiting
for the 6.0.5 release before updating, or installing the 2.6.32-45 version
ahead of time from proposed-updates.

The following matrix lists additional source packages that were rebuilt for
compatibility with or to take advantage of this update:

                                             Debian 6.0 (squeeze)
     user-mode-linux                         2.6.32-1um-4+44

We recommend that you upgrade your linux-2.6 and user-mode-linux packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
- -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
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=ztHh
- -----END PGP SIGNATURE-----

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=RBmm
-----END PGP SIGNATURE-----