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Ubuntu 12.04 LTS: USN-2773-1 Critical Kernel Memory Corruption DoS

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Calendar Grey October 20, 2015
Scroller Ubuntu
=========================================================================Ubuntu Security Notice USN-
Several security issues were fixed in the kernel.

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)

Topics%20covered

Topics Covered

security advisory memory corruption kernel ubuntu dos

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

https://ubuntu.com/security/notices/USN-2773-1

CVE-2015-5156, CVE-2015-6937

Severity
critical
Lowest
Low
Medium
High
Critical

October 19, 2015

Topics%20covered

Topics Covered

security advisory memory corruption kernel ubuntu dos

Package Information

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

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