w_export.c in XWine 1.0.1 on Debian GNU/Linux sets insecure permissions (0666) for /etc/wine/config, which might allow local users to execute arbitrary commands or cause a denial of service by modifying the file.
http://www.securityfocus.com/bid/28369
http://www.debian.org/security/2008/dsa-1526
http://secunia.com/advisories/29452