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Ubuntu Security Notice USN-1227-1

Ubuntu Security Notice USN-1227-1
Posted Oct 12, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1227-1 - 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. 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. Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, local, root
systems | linux, ubuntu
advisories | 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
SHA-256 | 87d2aaa8ca6ba6b00c9ca09b32765eba40fef19b74fb5429c7386a7141501ba4

Ubuntu Security Notice USN-1227-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-1227-1
October 11, 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)

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

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

References:
http://www.ubuntu.com/usn/usn-1227-1
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

Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.35-30.60


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