Luigi Auriemma has discovered some vulnerabilities in Foxit WAC Server, which can be exploited by malicious people to cause a DoS (Denial of Service) or to compromise a vulnerable system.
1) A boundary error within the Foxit WAC Server service (wacsvr.exe) can be exploited to cause a heap-based buffer overflow via a specially crafted packet sent to the Telnet port (default port 23/TCP).
2) An error exists within the Foxit WAC Server service (wacsvr.exe) when processing SSH packets. This can be exploited to cause a heap-based buffer overflow via an overly long SSH packet sent to the SSH port (default port 22/TCP).
Successful exploitation of the vulnerabilities allows execution of arbitrary code.
The vulnerabilities are confirmed in version 2.0 build 3503. Other versions may also be affected.
Solution: Restrict network access to the service.
Provided and/or discovered by: Luigi Auriemma
Original Advisory: http://aluigi.altervista.org/adv/wachof-adv.txt
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Subject: Foxit WAC Server Multiple Vulnerabilities
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