USN-1236-1: Linux kernel vulnerabilities

20 October 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

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