Ubuntu Security Notice USN-1612-1

15th October, 2012

libgssglue vulnerability

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

• Ubuntu 12.04 LTS
• Ubuntu 11.10
• Ubuntu 11.04
• Ubuntu 10.04 LTS

Summary

Privilege escalation via the GSSAPI_MECH_CONF environment variable with setuid programs.

Software description

• libgssglue - header files and docs for libgssglue

Details

It was discovered that libgssglue incorrectly handled the GSSAPI_MECH_CONF
environment variable when running a privileged binary. A local attacker could
exploit this to gain root privileges. (CVE-2011-2709)

Update instructions

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

Ubuntu 12.04 LTS:

libgssglue1 0.3-4ubuntu0.1

Ubuntu 11.10:

libgssglue1 0.3-1ubuntu1.1

Ubuntu 11.04:

libgssglue1 0.1-4ubuntu1.1

Ubuntu 10.04 LTS:

libgssglue1 0.1-4ubuntu0.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References

CVE-2011-2709