source: http://www.securityfocus.com/bid/41918/info

IBM Java is prone to a security-bypass vulnerability because it fails to sufficiently sanitize user-supplied input.

Successful exploits can allow attackers to bypass filtering mechanisms; this may aid in further attacks.

Versions prior to IBM Java SDK 1.4.2 SR13-FP6, Java SE 5.0.0-SR12, and Java SE 6.0.0-SR9 are vulnerable. 

The following example URI's are available:

http://www.example.com/ctx/index%c0%aehtml
http://www.example.com/ctx/index.%c1%bfj%c1%bfs%c1%bfp%c1%bf 