Upgrade to version 2.01-10-RB06 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.
Vendor URL: http://www.irc.unizh.ch/users/pfrei/webalizer/
Related OSVDB ID: 21446
Related OSVDB ID: 21448
Mail List Post: http://archives.neohapsis.com/archives/apps/freshmeat/2005-12/0002.html