CVE-2004-0492

CRITICAL

Heap-based buffer overflow in proxy_util.c for mod_proxy in Apache 1.3.25 to 1.3.31 allows remote attackers to cause a denial of service (process crash) and possibly execute arbitrary code via a ne...

Affects 7 products across 5 vendors.

BCS7.92
CVSS 2.010.0
EPSS33.6%
Percentile98th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity.
◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2004. A critical vulnerability affects Apache systems (CVE-2004-0492). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2004-GLOBAL-343599-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2004-0492?
This vulnerability was disclosed in 2004. A critical vulnerability affects Apache systems (CVE-2004-0492). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2004-0492?
CVE-2004-0492 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 33.6%.
Is CVE-2004-0492 actively exploited?
No confirmed active exploitation of CVE-2004-0492 as of 2026-09-25.
How do I remediate CVE-2004-0492?
Priority: MEDIUM. Advisory: http://rhn.redhat.com/errata/RHSA-2004-245.html PSIRT: [email protected]
What systems are affected by CVE-2004-0492?
CVE-2004-0492 affects: Apache, Hp, Hp, Hp, Ibm, Openbsd, Sgi.
Vulnerability Details
CVE IDCVE-2004-0492
BSIDBS-2004-GLOBAL-343599-C BreachSpider Global ID
CVSS VectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Published2004-08-06
Last Modified2026-06-16
ICS Relevance0%
SourceNVD
Official Description

Heap-based buffer overflow in proxy_util.c for mod_proxy in Apache 1.3.25 to 1.3.31 allows remote attackers to cause a denial of service (process crash) and possibly execute arbitrary code via a negative Content-Length HTTP header field, which causes a large amount of data to be copied.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: Heap-based buffer overflow in proxy_util.c for mod_proxy in Apache 1.3.25 to 1.3.31 allows remote attackers to cause a denial of service (process crash) and possibly execute arbitrary code via a negative Content-Length HTTP header field, which causes a large amount of data to be copied. CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C.

Exploitation Likelihood: LOW

Affected Products
VendorProductFixed Version
Apache Http Server —
Hp Vvos —
Hp Virtualvault —
Hp Webproxy —
Ibm Http Server —
Openbsd Openbsd —
Sgi Propack —
Remediation
View Vendor Advisory →

Remediation Priority: MEDIUM

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: September 2026 | Threat Age: 8088 Days
CISA KEVNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hash2937a3dc3e6179d09d5e23b87611de4b5170315b691b9199ef3cd3b2335b3050c2b981ac0d85fe52fc5272b3be7a82ed15e2d57b0cc0034d4a8803944e6ca136
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