CVE-2000-0969

Format string vulnerability in Half Life dedicated server build 3104 and earlier allows remote attackers to execute arbitrary commands by injecting format strings into the changelevel command, via the system console or rcon.

What this means for your business

It affects Valve Software Half-Life Dedicated Server. It matters if your company, or a supplier that handles your data, runs it.
An attacker can use it remotely, over a network.
FIRST's prediction model gives it a 3% chance of attack attempts being seen in the next 30 days, ranking above 88% of all known flaws.

What to do

1Check whether your company or your suppliers run Valve Software Half-Life Dedicated Server, and which version. The affected versions are listed further down this page.
2If you do, follow the vendor's guidance. No patch reference has been published yet.

Not sure if your company is exposed?

Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.

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Scoring

CVSS: 10.0 (v2.0)
Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Assigned by: cve@mitre.org

Dates

Published: 2000-12-19
Last modified: 2026-09-23
Sources: NVD

Affected products

Valve Software Half-Life Dedicated Server3.1.3

As listed in the NVD configuration data. Not a statement about your estate.