USN-1507-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-1507-1

16th 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 version:

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

CVE-2012-1601, CVE-2012-2744