Ubuntu Security Notice USN-2773-1
19th October, 2015
linux vulnerabilities
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 version:
- Ubuntu 12.04 LTS:
-
linux-image-3.2.0-92-virtual
3.2.0-92.130
-
linux-image-3.2.0-92-generic-pae
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-omap
3.2.0-92.130
-
linux-image-3.2.0-92-generic
3.2.0-92.130
-
linux-image-3.2.0-92-highbank
3.2.0-92.130
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.