6.9 - USN-1183-1

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 10.10

Summary:

Multiple kernel flaws have been fixed.

Software Description: - linux: Linux kernel

Details:

Dan Rosenberg discovered that multiple terminal ioctls did not correctly initialize structure memory. A local attacker could exploit this to read portions of kernel stack memory, leading to a loss of privacy. (CVE-2010-4076, CVE-2010-4077)

Neil Horman discovered that NFSv4 did not correctly handle certain orders of operation with ACL data. A remote attacker with access to an NFSv4 mount could exploit this to crash the system, leading to a denial of service. (CVE-2011-1090)

Timo Warns discovered that OSF partition parsing routines did not correctly clear memory. A local attacker with physical access could plug in a specially crafted block device to read kernel memory, leading to a loss of privacy. (CVE-2011-1163)

Timo Warns discovered that the GUID partition parsing routines did not correctly validate certain structures. A local attacker with physical access could plug in a specially crafted block device to crash the system, leading to a denial of service. (CVE-2011-1577)

Oliver Hartkopp and Dave Jones discovered that the CAN network driver did not correctly validate certain socket structures. If this driver was loaded, a local attacker could crash the system, leading to a denial of service. (CVE-2011-1598)

Vasiliy Kulikov discovered that the AGP driver did not check the size of certain memory allocations. A local attacker with access to the video subsystem could exploit this to run the system out of memory, leading to a denial of service. (CVE-2011-1746)

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 10.10:
linux-image-2.6.35-30-generic 2.6.35-30.56
linux-image-2.6.35-30-generic-pae 2.6.35-30.56
linux-image-2.6.35-30-omap 2.6.35-30.56
linux-image-2.6.35-30-powerpc 2.6.35-30.56
linux-image-2.6.35-30-powerpc-smp 2.6.35-30.56
linux-image-2.6.35-30-powerpc64-smp 2.6.35-30.56
linux-image-2.6.35-30-server 2.6.35-30.56
linux-image-2.6.35-30-versatile 2.6.35-30.56
linux-image-2.6.35-30-virtual 2.6.35-30.56

After a standard system update you need to reboot your computer to make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-1183-1
CVE-2010-4076, CVE-2010-4077, CVE-2011-1090, CVE-2011-1163,
CVE-2011-1577, CVE-2011-1598, CVE-2011-1746

Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.35-30.56