Luigi Auriemma has discovered some vulnerabilities in MG-SOFT Net Inspector, which can be exploited by malicious people to disclose sensitive information, cause a DoS (Denial of Service), or potentially compromise a vulnerable system.
1) A format string error in the Net Inspector HTTP server (mghttpd) can be exploited via a specially crafted HTTP GET request containing format string specifiers.
Successful exploitation may allow execution of arbitrary code.
2) Input passed via e.g. a HTTP GET request to the Net Inspector HTTP Server (mghttpd) is not properly sanitised before being used. This can be exploited to display arbitrary files via directory traversal attacks.
3) An error exists in the SNMP Trap Service (MgWTrap3.exe) when processing UDP requests. This can be exploited to crash an affected service via an UDP packet sent to the arbitrary port on which MgWTrap3.exe is listening.
4) An error exists in the Net Inspector Server (niengine) when processing network packets. This can be exploited to freeze the service via a specially crafted packet sent to TCP port 5221 by default.
The vulnerabilities are confirmed in version 6.5 on Windows. Other versions may also be affected.
Solution: Update to the latest version.
Provided and/or discovered by: Luigi Auriemma
Original Advisory: http://aluigi.altervista.org/adv/netinsp-adv.txt
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Subject: MG-SOFT Net Inspector Multiple Vulnerabilities
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