USN-1507-1: Linux kernel vulnerabilities

17 July 2012

linux vulnerabilities

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

  • Ubuntu 8.04 LTS

Summary

Several security issues were fixed in the kernel.

Software Description

  • linux - Linux kernel

Details

A flaw was found in the Linux kernel’s KVM (Kernel Virtual Machine) virtual cpu setup. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service. (CVE-2012-1601)

An error was found in the Linux kernel’s IPv6 netfilter when connection tracking is enabled. A remote attacker could exploit this flaw to crash a system if it is using IPv6 with the nf_contrack_ipv6 kernel module loaded. (CVE-2012-2744)

Update instructions

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

Ubuntu 8.04 LTS
linux-image-2.6.24-32-386 - 2.6.24-32.104
linux-image-2.6.24-32-generic - 2.6.24-32.104
linux-image-2.6.24-32-hppa32 - 2.6.24-32.104
linux-image-2.6.24-32-hppa64 - 2.6.24-32.104
linux-image-2.6.24-32-itanium - 2.6.24-32.104
linux-image-2.6.24-32-lpia - 2.6.24-32.104
linux-image-2.6.24-32-lpiacompat - 2.6.24-32.104
linux-image-2.6.24-32-mckinley - 2.6.24-32.104
linux-image-2.6.24-32-openvz - 2.6.24-32.104
linux-image-2.6.24-32-powerpc - 2.6.24-32.104
linux-image-2.6.24-32-powerpc-smp - 2.6.24-32.104
linux-image-2.6.24-32-powerpc64-smp - 2.6.24-32.104
linux-image-2.6.24-32-rt - 2.6.24-32.104
linux-image-2.6.24-32-server - 2.6.24-32.104
linux-image-2.6.24-32-sparc64 - 2.6.24-32.104
linux-image-2.6.24-32-sparc64-smp - 2.6.24-32.104
linux-image-2.6.24-32-virtual - 2.6.24-32.104
linux-image-2.6.24-32-xen - 2.6.24-32.104

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.

ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well.

References