OSEC

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Re: BEA WebLogic internal hostname disclosure

From: Kurt Seifried (kurtseifried.org)
Date: Thu Apr 03 2003 - 03:00:37 CST

> Hi,
>
> During a penentration test, I discovered that the BEA Weblogic Server
> reveals it hostname (on windows machines NetBIOS name) while sending the
> following request:
>
> GET . HTTP/1.0\r\n\r\n
>
> On older systems (Weblogic 7.0), a simple "BLAH . BLAH\r\n\r\n" will do
> the same trick. BEA was contacted about two weeks ago, but I haven't
> heard from them (yet).
>
> Regards,
> Michael

Reveals hostname:
./
.//
.//////////////
.%20
.%20%20
..

Does not reveal hostname:
...
.a
.1
.\
.%21

Seems that a single "." or a "." followed by a "special" character such as
"/" or %20 (space) works. Don't know what other "special" characters work.

Kurt Seifried, kurtseifried.org
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http://seifried.org/security/