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securityvulnsSecurityvulnsSECURITYVULNS:DOC:19220
HistoryFeb 20, 2008 - 12:00 a.m.

Two heap overflow in Foxit WAC Server 2.0 Build 3503

2008-02-2000:00:00
vulners.com
19

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                         Luigi Auriemma

Application: Foxit Remote Access Server (WAC Server)
http://www.foxitsoft.com/wac/server_intro.php
Versions: <= 2.0 Build 3503
Platforms: Windows
Bugs: A] telnet option heap overflow
B] SSH packet heap overflow
Exploitation: remote
Date: 16 Feb 2008
Author: Luigi Auriemma
e-mail: [email protected]
web: aluigi.org

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1) Introduction
2) Bugs
3) The Code
4) Fix

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===============
1) Introduction

WAC is a commercial SSH/telnet server for Windows.

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2) Bugs


A] telnet option heap overflow

The WAC server is vulnerable to a heap overflow exploitable through the
usage of options longer than 260 bytes.

Note: this bug was wrongly reported by me as a crash and with a wrong
server version one month ago.


B] SSH packet heap overflow

The server is affected also by another heap overflow exploitable
through big SSH packets, anyway no deeper research has been performed
on this vulnerability.

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===========
3) The Code

http://aluigi.org/poc/wachof.zip

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======
4) Fix

No fix

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Luigi Auriemma
http://aluigi.org