(RHSA-2006:0547) squirrelmail security update

SquirrelMail is a standards-based webmail package written in PHP4.

A local file disclosure flaw was found in the way SquirrelMail loads
plugins. In SquirrelMail 1.4.6 or earlier, if register_globals is on and
magic_quotes_gpc is off, it became possible for an unauthenticated remote
user to view the contents of arbitrary local files the web server has
read-access to. This configuration is neither default nor safe, and
configuring PHP with the register_globals set on is dangerous and not
recommended. (CVE-2006-2842)

Users of SquirrelMail should upgrade to this erratum package, which
contains a backported patch to correct this issue.