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  3. Half-Life Client Server Message Format String Vulnerability

Half-Life Client Server Message Format String Vulnerability



Date Discovered

January 10, 2003


It has been reported that the Half-Life client contains a format string vulnerability. When receiving messages from an administrator through the adminmod add-on package, the client does not properly handle input. This could result in denial of service, or code execution.

Technologies Affected

  • Valvesoftware Half-Life 1.1.0 .0.8
  • Valvesoftware Half-Life 1.1.0 .0.9
  • Valvesoftware Half-Life 1.1.1 .0


Run all software as a nonprivileged user with minimal access rights.

Do not execute Half-Life client software as a privileged user.

Do not use client software to access unknown or untrusted hosts from critical systems.

Do not connect to unknown or untrusted Half-Life clients.
Currently we are not aware of any vendor-supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: vuldb@securityfocus.com <mailto:vuldb@securityfocus.com>.



Vulnerability discovery credited to "VOID.AT Security" .
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