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Ubuntu Security Notice USN-2773-1
October 19, 2015

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

– Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
– linux: Linux kernel

Details:

It was discovered that virtio networking in the Linux kernel did not handle
fragments correctly, leading to kernel memory corruption. A remote attacker
could use this to cause a denial of service (system crash) or possibly
execute code with administrative privileges. (CVE-2015-5156)

It was discovered that the Reliable Datagram Sockets (RDS) implementation
in the Linux kernel did not verify sockets were properly bound before
attempting to send a message, which could cause a NULL pointer dereference.
An attacker could use this to cause a denial of service (system crash).
(CVE-2015-6937)

Update instructions:

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

Ubuntu 12.04 LTS:
linux-image-3.2.0-92-generic 3.2.0-92.130
linux-image-3.2.0-92-generic-pae 3.2.0-92.130
linux-image-3.2.0-92-highbank 3.2.0-92.130
linux-image-3.2.0-92-omap 3.2.0-92.130
linux-image-3.2.0-92-powerpc-smp 3.2.0-92.130
linux-image-3.2.0-92-powerpc64-smp 3.2.0-92.130
linux-image-3.2.0-92-virtual 3.2.0-92.130

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:
http://www.ubuntu.com/usn/usn-2773-1
CVE-2015-5156, CVE-2015-6937

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.2.0-92.130

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