CVE-2002-0964 describes a denial-of-service vulnerability affecting Half-Life Server 1.1.1.0 and earlier, including the dedicated server. Remote attackers can exploit this by sending multiple challenge responses with unique cd_key values, exhausting server resources and preventing legitimate players from connecting until the malicious connections time out. With a CVSS score of 5.0 (AV:N/AC:L/Au:N/C:N/I:N/A:P), this vulnerability is easily exploitable over the network with low complexity and no authentication, leading to a partial availability impact. While not listed on CISA's KEV catalog and lacking Metasploit or Nuclei modules, an ExploitDB entry (EDB-21572) confirms the existence of public exploit code, though there is no evidence of active exploitation or significant community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.1.0.4CPE matchmatch criteria | cpe:2.3:a:valve_software:half-life:1.1.0.4:*:linux:*:*:*:*:* | ||
1.1.0.4CPE matchmatch criteria | cpe:2.3:a:valve_software:half-life:1.1.0.4:*:windows:*:*:*:*:* | ||
1.1.0.8CPE matchmatch criteria | cpe:2.3:a:valve_software:half-life:1.1.0.8:*:*:*:*:*:*:* | ||
1.1.0.9CPE matchmatch criteria | cpe:2.3:a:valve_software:half-life:1.1.0.9:*:*:*:*:*:*:* | ||
1.1.1.0CPE matchmatch criteria | cpe:2.3:a:valve_software:half-life:1.1.1.0:*:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P
No social media mentions found for this CVE.
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.