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Ubuntu 12.04 LTS USN-2492-1 Important Kernel Update: DoS and Leak Fixes

ubuntu
Calendar Grey February 4, 2015
Dist Ubuntu Esm H88
Multiple kernel vulnerabilities were addressed in Ubuntu 12.04 LTS, enhancing overall system security and reliability.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Andy Lutomirski discovered an information leak in the Linux kernel's Thread

Local Storage (TLS) implementation allowing users to bypass the espfix to

obtain information that could be used to bypass the Address Space Layout

Randomization (ASLR) protection mechanism. A local user could exploit this

flaw to obtain potentially sensitive information from kernel memory.

(CVE-2014-8133)

A flaw was discovered with file renaming in the linux kernel. A local user

could exploit this flaw to cause a denial of service (deadlock and system

hang). (CVE-2014-8559)

Prasad J Pandit reported a flaw in the rock_continue function of the Linux

kernel's ISO 9660 CDROM file system. A local user could exploit this flaw

to cause a denial of service (system crash or hang). (CVE-2014-9420)

Topics%20covered

Topics Covered

security advisory denial of service information leak critical kernel system update ubuntu

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-76-generic    3.2.0-76.111
  linux-image-3.2.0-76-generic-pae  3.2.0-76.111
  linux-image-3.2.0-76-highbank   3.2.0-76.111
  linux-image-3.2.0-76-omap       3.2.0-76.111
  linux-image-3.2.0-76-powerpc-smp  3.2.0-76.111
  linux-image-3.2.0-76-powerpc64-smp  3.2.0-76.111
  linux-image-3.2.0-76-virtual    3.2.0-76.111

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-2492-1

CVE-2014-8133, CVE-2014-8559, CVE-2014-9420

Severity
important
Lowest
Low
Medium
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Critical

February 04, 2015

Topics%20covered

Topics Covered

security advisory denial of service information leak critical kernel system update ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-76.111

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