CVE-2002-0964

CVE-2002-0964 is a medium-severity vulnerability in Valve Software Half-life with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Half-Life Server 1.1.1.0 and earlier allows remote attackers to cause a denial of service (resource exhaustion) via multiple responses to the initial challenge with different cd_key values, which reaches the player limit and prevents other players from connecting until the original responses have timed out.

Frequently asked questions

What is CVE-2002-0964?
Half-Life Server 1.1.1.0 and earlier allows remote attackers to cause a denial of service (resource exhaustion) via multiple responses to the initial challenge with different cd_key values, which reaches the player limit and prevents other players from connecting until the original responses have timed out.
How severe is CVE-2002-0964?
CVE-2002-0964 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2002-0964 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2002-0964?
CVE-2002-0964 primarily affects Valve Software Half-life. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2002-0964?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2002-0964 published?
CVE-2002-0964 was published on 2002-10-04 and last updated on 2026-06-16.

References

Affected products (7)

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