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Ubuntu 12.04 LTS: 2596-1 Moderate: Linux Kernel Local Attack Escalation

ubuntu
Calendar Grey May 5, 2015
Dist Ubuntu Esm H88
A security flaw in the Linux kernel of Ubuntu may permit local users to obtain administrative privileges. It is crucial to update your system without delay.
The system could be made to run programs as an administrator.

Summary

The system could be made to run programs as an administrator.

Software Description:

- linux: Linux kernel

Details:

A race condition between chown() and execve() was discovered in the Linux

kernel. A local attacker could exploit this race by using chown on a

setuid-user-binary to gain administrative privileges.

Topics%20covered

Topics Covered

security advisory local privilege escalation system update ubuntu linux kernel

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-83-generic    3.2.0-83.120
  linux-image-3.2.0-83-generic-pae  3.2.0-83.120
  linux-image-3.2.0-83-highbank   3.2.0-83.120
  linux-image-3.2.0-83-omap       3.2.0-83.120
  linux-image-3.2.0-83-powerpc-smp  3.2.0-83.120
  linux-image-3.2.0-83-powerpc64-smp  3.2.0-83.120
  linux-image-3.2.0-83-virtual    3.2.0-83.120

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-2596-1

CVE-2015-3339

Severity
important
Lowest
Low
Medium
High
Critical

May 05, 2015

Topics%20covered

Topics Covered

security advisory local privilege escalation system update ubuntu linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-83.120

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