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----------------------------------------------------------------------
Debian Security Advisory DSA-XXXX-1 security@debian.org
http://www.debian.org/security/ Dann Frazier
March XX, 2012 http://www.debian.org/security/faq
----------------------------------------------------------------------
Package : linux-2.6
Vulnerability : privilege escalation/denial of service/information leak
Problem type : local/remote
Debian-specific: no
CVE Id(s) : CVE-2009-4307 CVE-2011-1833 CVE-2011-4127 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.
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
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