USN-1183-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-1183-1

3rd August, 2011

linux vulnerabilities

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 version:

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

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2010-4076, CVE-2010-4077, CVE-2011-1090, CVE-2011-1163, CVE-2011-1577, CVE-2011-1598, CVE-2011-1746