USN-1225-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-1225-1

4th October, 2011

linux vulnerabilities

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

Ubuntu 8.04 LTS

Summary

Multiple kernel flaws have been fixed.

Software description

linux - Linux kernel

Details

Timo Warns discovered that the EFI GUID partition table was not correctly
parsed. A physically local attacker that could insert mountable devices
could exploit this to crash the system or possibly gain root privileges.
(CVE-2011-1776)

Dan Rosenberg discovered that the IPv4 diagnostic routines did not
correctly validate certain requests. A local attacker could exploit this to
consume CPU resources, leading to a denial of service. (CVE-2011-2213)

Dan Rosenberg discovered that the Bluetooth stack incorrectly handled
certain L2CAP requests. If a system was using Bluetooth, a remote attacker
could send specially crafted traffic to crash the system or gain root
privileges. (CVE-2011-2497)

Fernando Gont discovered that the IPv6 stack used predictable fragment
identification numbers. A remote attacker could exploit this to exhaust
network resources, leading to a denial of service. (CVE-2011-2699)

Time Warns discovered that long symlinks were incorrectly handled on Be
filesystems. A local attacker could exploit this with a malformed Be
filesystem and crash the system, leading to a denial of service.
(CVE-2011-2928)

Darren Lavender discovered that the CIFS client incorrectly handled certain
large values. A remote attacker with a malicious server could exploit this
to crash the system or possibly execute arbitrary code as the root user.
(CVE-2011-3191)

Update instructions

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

Ubuntu 8.04 LTS:: linux-image-2.6.24-29-sparc64 2.6.24-29.94; linux-image-2.6.24-29-rt 2.6.24-29.94; linux-image-2.6.24-29-lpia 2.6.24-29.94; linux-image-2.6.24-29-itanium 2.6.24-29.94; linux-image-2.6.24-29-sparc64-smp 2.6.24-29.94; linux-image-2.6.24-29-generic 2.6.24-29.94; linux-image-2.6.24-29-lpiacompat 2.6.24-29.94; linux-image-2.6.24-29-386 2.6.24-29.94; linux-image-2.6.24-29-hppa32 2.6.24-29.94; linux-image-2.6.24-29-xen 2.6.24-29.94; linux-image-2.6.24-29-powerpc 2.6.24-29.94; linux-image-2.6.24-29-powerpc-smp 2.6.24-29.94; linux-image-2.6.24-29-hppa64 2.6.24-29.94; linux-image-2.6.24-29-server 2.6.24-29.94; linux-image-2.6.24-29-powerpc64-smp 2.6.24-29.94; linux-image-2.6.24-29-virtual 2.6.24-29.94; linux-image-2.6.24-29-mckinley 2.6.24-29.94; linux-image-2.6.24-29-openvz 2.6.24-29.94

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-2011-1776, CVE-2011-2213, CVE-2011-2497, CVE-2011-2699, CVE-2011-2928, CVE-2011-3191