Articles / Ubuntu: New PyPAM packages …

Ubuntu: New PyPAM packages fix security vulnerabilities

Markus Vervier discovered that PyPAM incorrectly handled passwords containing NULL bytes. An attacker could exploit this to cause applications using PyPAM to crash, or possibly execute arbitrary code. Updated packages are available from security.ubuntu.com.

==========================================================================
Ubuntu Security Notice USN-1395-1
March 08, 2012

python-pam vulnerability
==========================================================================

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

- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS

Summary:

PyPAM could be made to crash or possibly run programs if it processed
a specially crafted password.

Software Description:
- python-pam: A Python interface to the PAM library

Details:

Markus Vervier discovered that PyPAM incorrectly handled passwords
containing NULL bytes. An attacker could exploit this to cause applications
using PyPAM to crash, or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 11.10:
 python-pam                      0.4.2-12.2ubuntu2.11.10.1

Ubuntu 11.04:
 python-pam                      0.4.2-12.2ubuntu2.11.04.1

Ubuntu 10.10:
 python-pam                      0.4.2-12.1ubuntu1.10.10.1

Ubuntu 10.04 LTS:
 python-pam                      0.4.2-12.1ubuntu1.10.04.1

After a standard system update you need to restart applications that use
PyPAM to make all the necessary changes.

References:
 http://www.ubuntu.com/usn/usn-1395-1
 CVE-2012-1502

Package Information:
 https://launchpad.net/ubuntu/+source/python-pam/0.4.2-12.2ubuntu2.11.10.1
 https://launchpad.net/ubuntu/+source/python-pam/0.4.2-12.2ubuntu2.11.04.1
 https://launchpad.net/ubuntu/+source/python-pam/0.4.2-12.1ubuntu1.10.10.1
 https://launchpad.net/ubuntu/+source/python-pam/0.4.2-12.1ubuntu1.10.04.1
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