---
title: "CVE-2004-0751: The char_buffer_read function… | CubePath"
description: "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…"
language: en
source: https://cubepath.com/security/cve/CVE-2004-0751
---

# CVE-2004-0751: The char_buffer_read function… | CubePath

## Description

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).

Official description from the CVE record, published by mitre. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2004-0751)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.72309 (72.3% probability)

Percentile

99.4%

Scores of

Nov 10, 2026

Model

v2026.06.15

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [RHSA-2004:463](http://www.redhat.com/support/errata/RHSA-2004-463.html)  (redhat.com) vendor-advisory
- [SUSE-SA:2004:030](http://www.novell.com/linux/security/advisories/2004%5F30%5Fapache2.html)  (novell.com) vendor-advisory
- [apache-modssl-speculative-dos(17273)](https://exchange.xforce.ibmcloud.com/vulnerabilities/17273)  (exchange.xforce.ibmcloud.com) vdb-entry
- [issues.apache.org/bugzilla/show\_bug.cgi?id=30134](http://issues.apache.org/bugzilla/show%5Fbug.cgi?id=30134)
- [2004-0047](http://www.trustix.org/errata/2004/0047/)  (trustix.org) vendor-advisory
- [MDKSA-2004:096](http://www.mandrakesecure.net/en/advisories/advisory.php?name=MDKSA-2004:096)  (mandrakesecure.net) vendor-advisory
- [GLSA-200409-21](http://www.gentoo.org/security/en/glsa/glsa-200409-21.xml)  (gentoo.org) vendor-advisory
- [oval:org.mitre.oval:def:11864](https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11864)  (oval.cisecurity.org) vdb-entry signature
- [20040911 Remote buffer overflow in Apache mod\_ssl when reverse proxying SSL](http://archives.neohapsis.com/archives/bugtraq/2004-09/0096.html)  (archives.neohapsis.com) mailing-list
- [\[httpd-cvs\] 20190815 svn commit: r1048742 \[2/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af93e9ac%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20190815 svn commit: r1048743 \[2/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec232489e7f79%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20200401 svn commit: r1058586 \[2/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/r0276683d8e1e07153fc8642618830ac0ade85b9ae0dc7b07f63bb8fc%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20200401 svn commit: r1058587 \[2/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/r8828e649175df56f1f9e3919938ac7826128525426e2748f0ab62feb%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210330 svn commit: r1073139 \[1/13\] - in /websites/staging/httpd/trunk/content: ./ security/json/](https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210330 svn commit: r1073139 \[3/13\] - in /websites/staging/httpd/trunk/content: ./ security/json/](https://lists.apache.org/thread.html/re895fc1736d25c8cf57e102c871613b8aeec9ea26fd8a44e7942b5ab%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210330 svn commit: r1888194 \[3/13\] - /httpd/site/trunk/content/security/json/](https://lists.apache.org/thread.html/rd65d8ba68ba17e7deedafbf5bb4899f2ae4dad781d21b931c2941ac3%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210330 svn commit: r1073140 \[2/4\] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/r2cb985de917e7da0848c440535f65a247754db8b2154a10089e4247b%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210330 svn commit: r1073143 \[2/3\] - in /websites/staging/httpd/trunk/content: ./ security/](https://lists.apache.org/thread.html/r9e8622254184645bc963a1d47c5d47f6d5a36d6f080d8d2c43b2b142%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210330 svn commit: r1073149 \[4/13\] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/](https://lists.apache.org/thread.html/r734a07156abf332d5ab27fb91d9d962cacfef4f3681e44056f064fa8%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210330 svn commit: r1073149 \[1/13\] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/](https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210603 svn commit: r1075360 \[1/3\] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2021-31618.json security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/r5f9c22f9c28adbd9f00556059edc7b03a5d5bb71d4bb80257c0d34e4%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210606 svn commit: r1075467 \[1/2\] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2021-31618.json security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/rb9c9f42dafa25d2f669dac2a536a03f2575bc5ec1be6f480618aee10%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210606 svn commit: r1075470 \[2/4\] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2020-13938.json security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/r5001ecf3d6b2bdd0b732e527654248abb264f08390045d30709a92f6%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list

## Timeline

1. ID reserved Jul 26, 2004
2. Record published Sep 10, 2004
3. Record last updated Aug 8, 2024

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## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:58 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)