CVE-2004-0493

CVE-2004-0493 is a medium-severity vulnerability in Apache Http Server with a CVSS 2.0 base score of 6.4. Its EPSS exploit-prediction score of 85% places it in the 100th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

The ap_get_mime_headers_core function in Apache httpd 2.0.49 allows remote attackers to cause a denial of service (memory exhaustion), and possibly an integer signedness error leading to a heap-based buffer overflow on 64 bit systems, via long header lines with large numbers of space or tab characters.

Frequently asked questions

What is CVE-2004-0493?
The ap_get_mime_headers_core function in Apache httpd 2.0.49 allows remote attackers to cause a denial of service (memory exhaustion), and possibly an integer signedness error leading to a heap-based buffer overflow on 64 bit systems, via long header lines with large numbers of space or tab characters.
How severe is CVE-2004-0493?
CVE-2004-0493 has a CVSS 2.0 base score of 6.4, rated medium severity.
Is CVE-2004-0493 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 85% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-0493?
CVE-2004-0493 primarily affects Apache Http Server. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-0493?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2004-0493 published?
CVE-2004-0493 was published on 2004-08-06 and last updated on 2026-06-16.

References

Affected products (16)

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