U radu jezgre operacijskog sustava Ubuntu 10.04 uočeno je više sigurnosnih propusta koje napadač može iskoristiti za DoS napad, povećanje ovlasti te otkrivanje osjetljivih informacija.

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Ubuntu Security Notice USN-1219-1
September 29, 2011

linux-lts-backport-maverick vulnerabilities
==========================================================================

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

- Ubuntu 10.04 LTS

Summary:

Multiple kernel flaws have been fixed.

Software Description:
- linux-lts-backport-maverick: Linux kernel backport from Maverick

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 10.04 LTS:
  linux-image-2.6.35-30-generic   2.6.35-30.60~lucid1
  linux-image-2.6.35-30-generic-pae  2.6.35-30.60~lucid1
  linux-image-2.6.35-30-server    2.6.35-30.60~lucid1
  linux-image-2.6.35-30-virtual   2.6.35-30.60~lucid1

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

References:
  http://www.ubuntu.com/usn/usn-1219-1
  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-lts-backport-maverick/2.6.35-30.60~lucid1