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    CVE-2004-0492

    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.

    Published:Jun 10, 2004
    Last Modified:Apr 16, 2026
    EPS:Jun 23, 2004
    EPSS Score:0.23714
    CVSS Score:10

    Affected Products

    Vendor
    Apache
    Product
    Http Server
    Vendor
    Hp
    Product
    Virtualvault
    Vendor
    Hp
    Product
    Vvos
    Vendor
    Hp
    Product
    Webproxy
    Vendor
    Ibm
    Product
    Http Server
    Vendor
    Openbsd
    Product
    Openbsd
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Sgi
    Product
    Propack

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-48913 (CVSS 7.3) — Use After Free vulnerability in Apache HTTP Server module mod_http2 when file handles are already exhausted. …
    CVE-2026-42536 (CVSS 7.5) — Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted…
    CVE-2026-44185 (CVSS 7.3) — Buffer Over-read vulnerability in Apache HTTP Server via outbound OCSP requests to an attacker controlled OCSP…
    CVE-2026-34355 (CVSS 7.5) — A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted …
    CVE-2026-44631 (CVSS 9.8) — Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. Th…
    CVE-2026-44119 (CVSS 5.5) — Improper Privilege Management vulnerability in Apache HTTP Server 2.4.67 and earlier allows local .htaccess au…
    CVE-2026-43951 (CVSS 6.5) — Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response lan…
    CVE-2026-42535 (CVSS 9.1) — A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to directly ma…
    CVE-2026-34356 (CVSS 7.5) — Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassRev…
    CVE-2026-44186 (CVSS 7.3) — Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the mod_proxy_ftp module in Apache HTT…

    References

    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
    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
    http://www.guninski.com/modproxy1.html
    http://www.kb.cert.org/vuls/id/541310
    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%3E
    https://lists.apache.org/thread.html/r734a07156abf332d5ab27fb91d9d962cacfef4f3681e44056f064fa8%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/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/rf2f0f3611f937cf6cfb3b4fe4a67f69885855126110e1e3f2fb2728e%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%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
    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
    http://www.guninski.com/modproxy1.html
    http://www.kb.cert.org/vuls/id/541310
    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%3E
    https://lists.apache.org/thread.html/r734a07156abf332d5ab27fb91d9d962cacfef4f3681e44056f064fa8%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/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/rf2f0f3611f937cf6cfb3b4fe4a67f69885855126110e1e3f2fb2728e%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%3A100112
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A4863

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High