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Vulnerabilities

Vulnerability · CVE-2002-0843

Buffer overflows in the ApacheBench benchmark support program (ab.c) in Apache before 1.3.27, and Apache 2.x before 2.0.43, allow a malicious web server to cause a den…

Published Oct 11, 2002 · catalog updated Jun 16, 2026 · http server

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2002-0843 is not in CISA KEV. FIRST estimates a 21.42% chance of exploitation in the next 30 days. Check whether you run http server.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
21.42%
Remediation
Advisory link
Affected products
cpe apache/http server

Buffer overflows in the ApacheBench benchmark support program (ab.c) in Apache before 1.3.27, and Apache 2.x before 2.0.43, allow a malicious web server to cause a denial of service and possibly execute arbitrary code via a long response.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe apache/http server1.3
  • cpe apache/http server1.3.1
  • cpe apache/http server1.3.3
  • cpe apache/http server1.3.4
  • cpe apache/http server1.3.6
  • cpe apache/http server1.3.9

How to fix CVE-2002-0843

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2002-0843 is not in CISA KEV. FIRST estimates a 21.42% chance of exploitation in the next 30 days. Check whether you run http server.

Which versions are affected?

Compare what you have installed with apache/http server 1.3; apache/http server 1.3.1; apache/http server 1.3.3; apache/http server 1.3.4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 21.42%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Apache HTTP Server security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 11, 2002 · Monitored products — critical

    Detected

    Buffer overflows in the ApacheBench benchmark support program (ab.c) in Apache before 1.3.27, and Apache 2.x before 2.0.43, allow a malicious web server to cause a denial of service and possibly execute arbitrary code via a long response.

  2. Jun 16, 2026 · Monitored products — critical

    Updated

    Buffer overflows in the ApacheBench benchmark support program (ab.c) in Apache before 1.3.27, and Apache 2.x before 2.0.43, allow a malicious web server to cause a denial of service and possibly execute arbitrary code via a long response.

Sources

  • CVE.orgVulnerability recordCVE-2002-0843

    Official CVE identifier

    cve.org
  • Monitored products — criticalVendor advisoryCVE-2002-0843

    Buffer overflows in the ApacheBench benchmark support program (ab.c) in Apache before 1.3.27, and Apache 2.x before 2.0.43, allow a malicious web server to cause a denial of service and possibly execute arbitrary code via a long response.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • Monitored products — criticalNov 3, 2026