Safe.pm 2.0.7 and earlier, when used in Perl 5.8.0 and earlier, may allow attackers to break out of safe compartments in (1) Safe::reval or (2) Safe::rdo using a redefined @_ variable, which is not reset between successive calls.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1160
http://www.securityfocus.com/bid/6111
http://www.redhat.com/support/errata/RHSA-2003-257.html
http://www.redhat.com/support/errata/RHSA-2003-256.html
http://www.iss.net/security_center/static/10574.php
http://www.debian.org/security/2002/dsa-208
http://use.perl.org/articles/02/10/06/1118222.shtml?tid=5
http://marc.info/?l=bugtraq&m=104040175522502&w=2
http://marc.info/?l=bugtraq&m=104033126305252&w=2
http://marc.info/?l=bugtraq&m=104005919814869&w=2
http://bugs6.perl.org/rt2/Ticket/Display.html?id=17744
http://archives.neohapsis.com/archives/vulnwatch/2002-q4/0061.html