Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2012.0317
linux-2.6 security update
27 March 2012
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: linux-2.6
Publisher: Debian
Operating System: Debian GNU/Linux 6
Impact/Access: Access Privileged Data -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2012-1097 CVE-2012-1090 CVE-2012-0045
CVE-2011-4347 CVE-2011-1833 CVE-2009-4307
Reference: ESB-2012.0248
ESB-2011.1002
ESB-2010.0050
Original Bulletin:
http://www.debian.org/security/2012/dsa-2443
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
- - ----------------------------------------------------------------------
Debian Security Advisory DSA-2443-1 security@debian.org
http://www.debian.org/security/ Dann Frazier
March 26, 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-2009-4307 CVE-2011-1833 CVE-2011-4347 CVE-2012-0045
CVE-2012-1090 CVE-2012-1097
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-2009-4307
Nageswara R Sastry reported an issue in the ext4 filesystem. Local users
with the privileges to mount a filesystem can cause a denial of service
(BUG) by providing a s_log_groups_per_flex value greater than 31.
CVE-2011-1833
Vasiliy Kulikov of Openwall and Dan Rosenberg discovered an information
leak in the eCryptfs filesystem. Local users were able to mount arbitrary
directories.
CVE-2011-4347
Sasha Levin reported an issue in the device assignment functionality in
KVM. Local users with permission to access /dev/kvm could assign unused pci
devices to a guest and cause a denial of service (crash).
CVE-2012-0045
Stephan Barwolf reported an issue in KVM. Local users in a 32-bit guest
running on a 64-bit system can crash the guest with a syscall instruction.
CVE-2012-1090
CAI Qian reported an issue in the CIFS filesystem. A reference count leak
can occur during the lookup of special files, resulting in a denial of
service (oops) on umount.
CVE-2012-1097
H. Peter Anvin reported an issue in the regset infrastructure. Local users
can cause a denial of service (NULL pointer dereference) by triggering the
write methods of readonly regsets.
For the stable distribution (squeeze), this problem has been fixed in version
2.6.32-41squeeze2.
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+41squeeze2
We recommend that you upgrade your linux-2.6 and user-mode-linux packages.
Thanks to Micah Anderson for proof reading this text.
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 v1.4.12 (GNU/Linux)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=gjmU
- -----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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=K2Wy
-----END PGP SIGNATURE-----