CVE-2004-0751

Exp

The char_buffer_read function in the mod_ssl module for Apache 2.x, when using reverse proxying to an SSL server, allows remote attackers to cause a denial of service (segmentation fault).

Published: 2004-10-20 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2004-0751 is rated High Exploit Risk (64.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 47.69%, 98th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2004-0751

EDB-ID Source Kind Published Link
24590 exploit_db edb 2004-09-10 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2004-0751

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-04 66.88% 47.69% -19.19%
2 2026-03-01 47.69% 66.88% +19.19%
3 2026-02-04 — 47.69% —

Full EPSS history (40 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2004-0751

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2004-0751

OS Trackers for CVE-2004-0751

vendor priority summary link
debian not yet assigned CVE-2004-0751 not yet assigned priority: Debian including 1 source packages (apache2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2004-0751
redhat low — https://access.redhat.com/security/cve/CVE-2004-0751
ubuntu medium CVE-2004-0751 medium priority: Ubuntu including 1 source packages (apache2), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. https://ubuntu.com/security/CVE-2004-0751

Vendor comments (NVD) for CVE-2004-0751

  • Apache (2008-07-02T00:00:00)

    Fixed in Apache HTTP Server 2.0.51: http://httpd.apache.org/security/vulnerabilities_20.html

Affected software / configurations for CVE-2004-0751

Vendor Product Version Raw CPE
apache http_server >= 2.0.44, < 2.0.51 cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

References for CVE-2004-0751

URL Tags
http://archives.neohapsis.com/archives/bugtraq/2004-09/0096.html Broken Link
http://issues.apache.org/bugzilla/show_bug.cgi?id=30134 Issue Tracking Patch Vendor Advisory
http://www.gentoo.org/security/en/glsa/glsa-200409-21.xml Third Party Advisory
http://www.mandrakesecure.net/en/advisories/advisory.php?name=MDKSA-2004:096 Broken Link
http://www.novell.com/linux/security/advisories/2004_30_apache2.html Broken Link
http://www.redhat.com/support/errata/RHSA-2004-463.html Third Party Advisory
http://www.trustix.org/errata/2004/0047/ Broken Link
https://exchange.xforce.ibmcloud.com/vulnerabilities/17273 Third Party Advisory VDB Entry
https://lists.apache.org/thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af93e9ac%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec232489e7f79%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r0276683d8e1e07153fc8642618830ac0ade85b9ae0dc7b07f63bb8fc%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r2cb985de917e7da0848c440535f65a247754db8b2154a10089e4247b%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r5001ecf3d6b2bdd0b732e527654248abb264f08390045d30709a92f6%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r5f9c22f9c28adbd9f00556059edc7b03a5d5bb71d4bb80257c0d34e4%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r734a07156abf332d5ab27fb91d9d962cacfef4f3681e44056f064fa8%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r8828e649175df56f1f9e3919938ac7826128525426e2748f0ab62feb%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9e8622254184645bc963a1d47c5d47f6d5a36d6f080d8d2c43b2b142%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rb9c9f42dafa25d2f669dac2a536a03f2575bc5ec1be6f480618aee10%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rd65d8ba68ba17e7deedafbf5bb4899f2ae4dad781d21b931c2941ac3%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/re895fc1736d25c8cf57e102c871613b8aeec9ea26fd8a44e7942b5ab%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11864 Third Party Advisory
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