How severe is CVE-2004-0724?

CVE-2004-0724 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2004-0724 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-0724?

CVE-2004-0724 primarily affects Valve Software Half-life. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-0724?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2004-0724 published?

CVE-2004-0724 was published on 2004-07-27 and last updated on 2026-06-16.

CVE-2004-0724

CVE-2004-0724 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

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Valve Software Half-life
Published: 2004-07-27
Last modified: 2026-06-16

Description

The Half-Life engine before July 7 2004 allows remote attackers to cause a denial of service (server or client crash) via an empty fragmented packet.

Frequently asked questions

What is CVE-2004-0724?: The Half-Life engine before July 7 2004 allows remote attackers to cause a denial of service (server or client crash) via an empty fragmented packet.
How severe is CVE-2004-0724?: CVE-2004-0724 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2004-0724 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-0724?: CVE-2004-0724 primarily affects Valve Software Half-life. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-0724?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2004-0724 published?: CVE-2004-0724 was published on 2004-07-27 and last updated on 2026-06-16.

References

Affected products (28)

cpe:2.3:a:valve_software:half-life:1.1.0.4:*:linux:*:*:*:*:*
cpe:2.3:a:valve_software:half-life:1.1.0.4:*:windows:*:*:*:*:*
cpe:2.3:a:valve_software:half-life:1.1.0.8:*:*:*:*:*:*:*
cpe:2.3:a:valve_software:half-life:1.1.0.9:*:*:*:*:*:*:*
cpe:2.3:a:valve_software:half-life:1.1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:3.1:*:*:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:3.1.0.4:*:linux:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:3.1.0.5:*:linux:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:3.1.0.6:*:linux:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:3.1.0.7:*:linux:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:3.1.0.8:*:linux:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:3.1.0.9:*:linux:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:3.1.1.0:*:linux:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:3.1.1.1c1:*:linux:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:3.1.1.1d:*:linux:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:3.1.1.1e:*:linux:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:3.1.1.1e:*:win32:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:3.1.3:*:*:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:4.1.0.4:*:win32:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:4.1.0.6:*:win32:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:4.1.0.7:*:win32:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:4.1.0.8:*:win32:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:4.1.0.9:*:win32:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:4.1.1.0:*:win32:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:4.1.1.1c1:*:win32:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:4.1.1.1d_beta:*:win32:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:4.1.1.1e:*:linux:*:*:*:*:*
cpe:2.3:a:valve_software:half-life_dedicated_server:4.1.1.1e:*:win32:*:*:*:*:*

More vulnerabilities in Valve Software Half-life

CVE-2001-0964 — High (CVSS 7.5): Buffer overflow in client for Half-Life 1.1.0.8 and earlier allows malicious remote servers to execute arbitrary code…
CVE-2001-0358 — High (CVSS 7.5): Buffer overflows in Sierra Half-Life build 1573 and earlier allow remote attackers to execute arbitrary code via (1) a…
CVE-2002-0964 — Medium (CVSS 5.0): Half-Life Server 1.1.1.0 and earlier allows remote attackers to cause a denial of service (resource exhaustion) via…

All CVEs affecting Valve Software Half-life →