USN-1227-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-1227-1

11th October, 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


Ryan Sweat discovered that the kernel incorrectly handled certain VLAN
packets. On some systems, a remote attacker could send specially crafted
traffic to crash the system, leading to a denial of service.
(CVE-2011-1576)

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)

Vasiliy Kulikov and Dan Rosenberg discovered that ecryptfs did not
correctly check the origin of mount points. A local attacker could exploit
this to trick the system into unmounting arbitrary mount points, leading to
a denial of service. (CVE-2011-1833)

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)

Mauro Carvalho Chehab discovered that the si4713 radio driver did not
correctly check the length of memory copies. If this hardware was
available, a local attacker could exploit this to crash the system or gain
root privileges. (CVE-2011-2700)

Herbert Xu discovered that certain fields were incorrectly handled when
Generic Receive Offload (CVE-2011-2723)

The performance counter subsystem did not correctly handle certain
counters. A local attacker could exploit this to crash the system, leading
to a denial of service. (CVE-2011-2918)

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)

Gideon Naim discovered a flaw in the Linux kernel's handling VLAN 0 frames.
An attacker on the local network could exploit this flaw to cause a denial
of service. (CVE-2011-3593)

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 2.6.35-30.60
linux-image-2.6.35-30-versatile 2.6.35-30.60
linux-image-2.6.35-30-server 2.6.35-30.60
linux-image-2.6.35-30-powerpc64-smp 2.6.35-30.60
linux-image-2.6.35-30-virtual 2.6.35-30.60
linux-image-2.6.35-30-generic-pae 2.6.35-30.60
linux-image-2.6.35-30-omap 2.6.35-30.60
linux-image-2.6.35-30-generic 2.6.35-30.60
linux-image-2.6.35-30-powerpc 2.6.35-30.60

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-2011-1576, CVE-2011-1776, CVE-2011-1833, CVE-2011-2213, CVE-2011-2497, CVE-2011-2699, CVE-2011-2700, CVE-2011-2723, CVE-2011-2918, CVE-2011-2928, CVE-2011-3191, CVE-2011-3593