1. Ubuntu Security Notices
  2. USN-1236-1

USN-1236-1: Linux kernel vulnerabilities

Publication date

20 October 2011

Overview

Multiple kernel flaws have been fixed.

Releases

Packages

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...

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
8.04 hardy linux-image-2.6.24-29-sparc64 –  2.6.24-29.95
linux-image-2.6.24-29-rt –  2.6.24-29.95
linux-image-2.6.24-29-386 –  2.6.24-29.95
linux-image-2.6.24-29-itanium –  2.6.24-29.95
linux-image-2.6.24-29-hppa32 –  2.6.24-29.95
linux-image-2.6.24-29-openvz –  2.6.24-29.95
linux-image-2.6.24-29-generic –  2.6.24-29.95
linux-image-2.6.24-29-xen –  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-hppa64 –  2.6.24-29.95
linux-image-2.6.24-29-server –  2.6.24-29.95
linux-image-2.6.24-29-powerpc64-smp –  2.6.24-29.95
linux-image-2.6.24-29-lpia –  2.6.24-29.95
linux-image-2.6.24-29-virtual –  2.6.24-29.95
linux-image-2.6.24-29-mckinley –  2.6.24-29.95
linux-image-2.6.24-29-sparc64-smp –  2.6.24-29.95
linux-image-2.6.24-29-lpiacompat –  2.6.24-29.95

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›