Ubuntu Security Notice 1612-1 - 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.
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==========================================================================Ubuntu Security Notice USN-1612-1
October 15, 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 versions:
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
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1612-1
CVE-2011-2709
Package Information:
https://launchpad.net/ubuntu/+source/libgssglue/0.3-4ubuntu0.1
https://launchpad.net/ubuntu/+source/libgssglue/0.3-1ubuntu1.1
https://launchpad.net/ubuntu/+source/libgssglue/0.1-4ubuntu1.1
https://launchpad.net/ubuntu/+source/libgssglue/0.1-4ubuntu0.1