PatchTheCVECVE-2004-0493: The ap_get_mime_headers_core function in Apache httpd 2.0.49 allows remote attackers to cause a denial of serv
CVE-2004-0493 is a medium-severity flaw (CVSS 6.4) affecting converged communications server, linux, secure linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- EPSS top 1%: very likely to be exploited
- Public exploit reference
- On your watchlist
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 6.4 (Medium) |
| EPSS exploit chance | 84.8% (top 1%) |
| CISA exploited list | No |
| Published | 2004-08-06 |
| Last modified | 2026-06-16 |
Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Exploit-DB: Apache - Arbitrary Long HTTP Headers Denial of Service
- Exploit-DB: Apache - Arbitrary Long HTTP Headers (Denial of Service)
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2004-0493?
converged communications server: mitigate or apply the listed mitigation; linux: mitigate or apply the listed mitigation; secure linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2004-0493 being exploited?
CVE-2004-0493 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2004-0493 affect?
CVE-2004-0493 affects converged communications server, linux, secure linux. Severity is medium (CVSS 6.4). 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 l
How urgent is CVE-2004-0493?
Priority 57/100. EPSS top 1%: very likely to be exploited; Public exploit reference; On your watchlist
Software pages
Apache HTTP Server vulnerabilities
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