The phpDocumentor package provides automatic documenting of PHP API directly from the source.
phpDocumentor bundles Smarty with the modifier.regex_replace.php plug-in which does not properly sanitize input related to the ASCII NUL character in a search string.
A remote attacker could call arbitrary PHP functions via templates.
There is no known workaround at this time.
All phpDocumentor users should upgrade to the latest stable version:
# emerge --sync
# emerge --ask --oneshot --verbose
">=dev-php/PEAR-PhpDocumentor-1.4.3-r1"
NOTE: This is a legacy GLSA. Updates for all affected architectures are available since February 12, 2011. It is likely that your system is already no longer affected by this issue.