Title: NetSQL Remote Buffer Overflow Vulnerability
Severity: CRITICAL
Description:
NetSQL is an implementation of a database and toolset distributed by Munica Corporation. NetSQL is part of 5 piece software package called the Webpak, containing utilities for features such as web boards, membership, and online calendars.
A problem in NetSQL allows remote users to gain elevated privileges. Exploitation of this vulnerability can allow a remote attacker to gain a remote root shell, and result in complete compromise of the vulnerable server.
Under normal operation, the NetSQL server listens on port 6500 for incoming connections. Upon receiving a connection, the server negotiates the connection, and initiates the authentication and connection sequence.
The problem involves the negotiation of connections during a client-server interaction. Upon connecting to the server, it's possible to send a custom-crafted string of 180 bytes to the server, causing a stack based overflow.
The daemon runs as root by default. This allows a remote user to overwrite stack variables, including the return address, and execute code as root. A remote user may then gain remote administrative access to the affected system.
Affected Products:
- Munica NetSQL 1.0.0
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