[USN-1236-1] Linux kernel vulnerabilities

Marc Deslauriers marc.deslauriers at canonical.com
Thu Oct 20 20:41:06 UTC 2011


==========================================================================
Ubuntu Security Notice USN-1236-1
October 20, 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:

It was discovered that the Auerswald usb driver incorrectly handled lengths
of the USB string descriptors. A local attacker with physical access could
insert a specially crafted USB device and gain root privileges.
(CVE-2009-4067)

It was discovered that the Stream Control Transmission Protocol (SCTP)
implementation incorrectly calculated lengths. If the net.sctp.addip_enable
variable was turned on, a remote attacker could send specially crafted
traffic to crash the system. (CVE-2011-1573)

Vasiliy Kulikov discovered that taskstats did not enforce access
restrictions. A local attacker could exploit this to read certain
information, leading to a loss of privacy. (CVE-2011-2494)

Vasiliy Kulikov discovered that /proc/PID/io did not enforce access
restrictions. A local attacker could exploit this to read certain
information, leading to a loss of privacy. (CVE-2011-2495)

Dan Kaminsky discovered that the kernel incorrectly handled random sequence
number generation. An attacker could use this flaw to possibly predict
sequence numbers and inject packets. (CVE-2011-3188)

Update instructions:

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

Ubuntu 8.04 LTS:
  linux-image-2.6.24-29-386       2.6.24-29.95
  linux-image-2.6.24-29-generic   2.6.24-29.95
  linux-image-2.6.24-29-hppa32    2.6.24-29.95
  linux-image-2.6.24-29-hppa64    2.6.24-29.95
  linux-image-2.6.24-29-itanium   2.6.24-29.95
  linux-image-2.6.24-29-lpia      2.6.24-29.95
  linux-image-2.6.24-29-lpiacompat  2.6.24-29.95
  linux-image-2.6.24-29-mckinley  2.6.24-29.95
  linux-image-2.6.24-29-openvz    2.6.24-29.95
  linux-image-2.6.24-29-powerpc   2.6.24-29.95
  linux-image-2.6.24-29-powerpc-smp  2.6.24-29.95
  linux-image-2.6.24-29-powerpc64-smp  2.6.24-29.95
  linux-image-2.6.24-29-rt        2.6.24-29.95
  linux-image-2.6.24-29-server    2.6.24-29.95
  linux-image-2.6.24-29-sparc64   2.6.24-29.95
  linux-image-2.6.24-29-sparc64-smp  2.6.24-29.95
  linux-image-2.6.24-29-virtual   2.6.24-29.95
  linux-image-2.6.24-29-xen       2.6.24-29.95

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

References:
  http://www.ubuntu.com/usn/usn-1236-1
  CVE-2009-4067, CVE-2011-1573, CVE-2011-2494, CVE-2011-2495,
  CVE-2011-3188

Package Information:
  https://launchpad.net/ubuntu/+source/linux/2.6.24-29.95


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