USN-1507-1: Linux kernel vulnerabilities

17 July 2012

Several security issues were fixed in the kernel.

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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)

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Update instructions

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

Ubuntu 8.04

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

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