Title: Half-Life Client Side Connect Buffer Overflow Vulnerability
Severity: HIGH
Description:
Half-Life is a popular game distributed and maintained by Valve Software. It includes features that allow users to game locally, or in distributed network environments.
A problem in the software package could allow a malicious server to execute arbitrary code. This could allow unauthorized local access.
The problem is in the /Connect command. This command is used by a client to negotiate a connection with a server on a specific IP address and port. A buffer overflow in this command occurs when 128 bytes or more of data have been received.
This problem is compounded by the fact that it's possible for a remote server to execute commands on the client. A server may execute the /Connect command on a client through utilities such as the Admin-Mod. An administrator with malicious intent could alter the Admin-Mod source to execute arbitrary commands when vulnerable clients attempted to connect, and thus give the malicious administrator access to the system with the same privileges of the user of the Half-Life client.
Affected Products:
- Valve Software Half-Life 1.1.0.0.8
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