USN-959-1: PAM vulnerability

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Ubuntu Security Notice USN-959-1 July 07, 2010
pam vulnerability
CVE-2010-0832
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A security issue affects the following Ubuntu releases:

Ubuntu 9.10
Ubuntu 10.04 LTS

This advisory also applies to the corresponding versions of
Kubuntu, Edubuntu, and Xubuntu.

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

Ubuntu 9.10:
libpam-modules 1.1.0-2ubuntu1.1

Ubuntu 10.04 LTS:
libpam-modules 1.1.1-2ubuntu5

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

Details follow:

Denis Excoffier discovered that the PAM MOTD module in Ubuntu did
not correctly handle path permissions when creating user file stamps.
A local attacker could exploit this to gain root privilieges.