USN-1538-1: Linux kernel (Natty backport) vulnerabilities

14 August 2012

linux-lts-backport-natty vulnerabilities

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

  • Ubuntu 10.04 LTS

Summary

Several security issues were fixed in the kernel.

Software Description

  • linux-lts-backport-natty - Linux kernel backport from Natty

Details

An error was discovered in the Linux kernel’s network TUN/TAP device implementation. A local user with access to the TUN/TAP interface (which is not available to unprivileged users until granted by a root user) could exploit this flaw to crash the system or potential gain administrative privileges. (CVE-2012-2136)

A flaw was found in the Linux kernel’s Reliable Datagram Sockets (RDS) protocol implementation. A local, unprivileged user could use this flaw to cause a denial of service. (CVE-2012-2372)

An error was discovered in the Linux kernel’s memory subsystem (hugetlb). An unprivileged local user could exploit this flaw to cause a denial of service (crash the system). (CVE-2012-2390)

Update instructions

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

Ubuntu 10.04 LTS
linux-image-2.6.38-15-generic - 2.6.38-15.65~lucid1
linux-image-2.6.38-15-generic-pae - 2.6.38-15.65~lucid1
linux-image-2.6.38-15-server - 2.6.38-15.65~lucid1
linux-image-2.6.38-15-virtual - 2.6.38-15.65~lucid1

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