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Vulnerability record · CVE-2004-0492 · published 6 August 2004

CVE-2004-0492: Apache http server vulnerability

Apache · Http Server

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.

10.0 CVSS 2.0 High EPSS 34% · top 1.7%
10.0CVSS 2.0 base score
34%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
48References
16 Jun 2026Last modified by NVD

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.

AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
ftp://patches.sgi.com/support/free/security/advisories/20040605-01-U.asc
http://marc.info/?l=bugtraq&m=108711172710140&w=2
http://marc.info/?l=bugtraq&m=130497311408250&w=2
http://rhn.redhat.com/errata/RHSA-2004-245.html PatchVendor Advisory
http://seclists.org/lists/fulldisclosure/2004/Jun/0296.html
http://secunia.com/advisories/11841
http://sunsolve.sun.com/search/document.do?assetkey=1-26-101555-1
http://sunsolve.sun.com/search/document.do?assetkey=1-26-101841-1
http://sunsolve.sun.com/search/document.do?assetkey=1-26-57628-1
http://www.debian.org/security/2004/dsa-525 PatchVendor Advisory
http://www.guninski.com/modproxy1.html
http://www.kb.cert.org/vuls/id/541310 US Government Resource
http://www.mandriva.com/security/advisories?name=MDKSA-2004:065
https://bugzilla.fedora.us/show_bug.cgi?id=1737
https://exchange.xforce.ibmcloud.com/vulnerabilities/16387
https://lists.apache.org/thread.html/r5419c9ba0951ef73a655362403d12bb8d10fab38274deb3f005816f5%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/r734a07156abf332d5ab27fb91d9d962cacfef4f3681e44056f064fa8%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/rd65d8ba68ba17e7deedafbf5bb4899f2ae4dad781d21b931c2941ac3%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/re895fc1736d25c8cf57e102c871613b8aeec9ea26fd8a44e7942b5ab%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/rf2f0f3611f937cf6cfb3b4fe4a67f69885855126110e1e3f2fb2728e%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100112
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A4863
ftp://patches.sgi.com/support/free/security/advisories/20040605-01-U.asc
http://marc.info/?l=bugtraq&m=108711172710140&w=2
http://marc.info/?l=bugtraq&m=130497311408250&w=2
http://rhn.redhat.com/errata/RHSA-2004-245.html PatchVendor Advisory
http://seclists.org/lists/fulldisclosure/2004/Jun/0296.html
http://secunia.com/advisories/11841
http://sunsolve.sun.com/search/document.do?assetkey=1-26-101555-1
http://sunsolve.sun.com/search/document.do?assetkey=1-26-101841-1
http://sunsolve.sun.com/search/document.do?assetkey=1-26-57628-1
http://www.debian.org/security/2004/dsa-525 PatchVendor Advisory
http://www.guninski.com/modproxy1.html
http://www.kb.cert.org/vuls/id/541310 US Government Resource
http://www.mandriva.com/security/advisories?name=MDKSA-2004:065
https://bugzilla.fedora.us/show_bug.cgi?id=1737
https://exchange.xforce.ibmcloud.com/vulnerabilities/16387
https://lists.apache.org/thread.html/r5419c9ba0951ef73a655362403d12bb8d10fab38274deb3f005816f5%40%3Ccvs.httpd.apache.org

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2004-0492), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.