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TITLE:
Pi3Web ISAPI Requests Handling Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA32696

VERIFY ADVISORY:
http://secunia.com/advisories/32696/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
Pi3Web 2.x
http://secunia.com/advisories/product/1500/

DESCRIPTION:
Hamid Ebadi has discovered a vulnerability in Pi3Web, which can be
exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error when handling HTTP
requests for files placed in the "ISAPI" directory. This can be
exploited to hang the server via multiple HTTP requests for invalid
DLLs placed in the affected directory (i.e. install.daf, readme.daf,
or users.txt).

Successful exploitation requires that Pi3Web is installed as a
Desktop application.

The vulnerability is confirmed in version 2.0.3 PL2 on Windows. Other
versions may also be affected.

SOLUTION:
Remove the install.daf, readme.daf, and users.txt files from the
"ISAPI" directory.

PROVIDED AND/OR DISCOVERED BY:
Hamid Ebadi, Amirkabir University CSIRT Laboratory

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/7109

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