The mod_dav module in Apache 2.0.50 and earlier allows remote attackers to cause a denial…
Priority MEDIUM 40Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
The mod_dav module in Apache 2.0.50 and earlier allows remote attackers to cause a denial of service (child process crash) via a certain sequence of LOCK requests for a location that allows WebDAV authoring access.
Why it matters now
EPSS 0.17155 97th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 30
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* | 2.0.35 to before 2.0.51 | Vulnerable | Apache |
| cpe:2.3:a:hp:secure_web_server_for_tru64:4.0_f:*:*:*:*:*:*:* | 4.0_f | Vulnerable | Hewlett Packard Enterprise |
| cpe:2.3:a:hp:secure_web_server_for_tru64:4.0_g:*:*:*:*:*:*:* | 4.0_g | Vulnerable | Hewlett Packard Enterprise |
| cpe:2.3:a:hp:secure_web_server_for_tru64:5.0_a:*:*:*:*:*:*:* | 5.0_a | Vulnerable | Hewlett Packard Enterprise |
| cpe:2.3:a:hp:secure_web_server_for_tru64:5.1:*:*:*:*:*:*:* | 5.1 | Vulnerable | Hewlett Packard Enterprise |
| cpe:2.3:a:hp:secure_web_server_for_tru64:5.1_a:*:*:*:*:*:*:* | 5.1_a | Vulnerable | Hewlett Packard Enterprise |
| cpe:2.3:a:hp:secure_web_server_for_tru64:5.8.1:*:*:*:*:*:*:* | 5.8.1 | Vulnerable | Hewlett Packard Enterprise |
| cpe:2.3:a:hp:secure_web_server_for_tru64:5.8.2:*:*:*:*:*:*:* | 5.8.2 | Vulnerable | Hewlett Packard Enterprise |
| cpe:2.3:a:hp:secure_web_server_for_tru64:5.9.1:*:*:*:*:*:*:* | 5.9.1 | Vulnerable | Hewlett Packard Enterprise |
| cpe:2.3:a:hp:secure_web_server_for_tru64:5.9.2:*:*:*:*:*:*:* | 5.9.2 | Vulnerable | Hewlett Packard Enterprise |
- cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* Versions 2.0.35 to before 2.0.51 Vulnerable ·Apache
- cpe:2.3:a:hp:secure_web_server_for_tru64:4.0_f:*:*:*:*:*:*:* Versions 4.0_f Vulnerable ·Hewlett Packard Enterprise
- cpe:2.3:a:hp:secure_web_server_for_tru64:4.0_g:*:*:*:*:*:*:* Versions 4.0_g Vulnerable ·Hewlett Packard Enterprise
- cpe:2.3:a:hp:secure_web_server_for_tru64:5.0_a:*:*:*:*:*:*:* Versions 5.0_a Vulnerable ·Hewlett Packard Enterprise
- cpe:2.3:a:hp:secure_web_server_for_tru64:5.1:*:*:*:*:*:*:* Versions 5.1 Vulnerable ·Hewlett Packard Enterprise
- cpe:2.3:a:hp:secure_web_server_for_tru64:5.1_a:*:*:*:*:*:*:* Versions 5.1_a Vulnerable ·Hewlett Packard Enterprise
- cpe:2.3:a:hp:secure_web_server_for_tru64:5.8.1:*:*:*:*:*:*:* Versions 5.8.1 Vulnerable ·Hewlett Packard Enterprise
- cpe:2.3:a:hp:secure_web_server_for_tru64:5.8.2:*:*:*:*:*:*:* Versions 5.8.2 Vulnerable ·Hewlett Packard Enterprise
- cpe:2.3:a:hp:secure_web_server_for_tru64:5.9.1:*:*:*:*:*:*:* Versions 5.9.1 Vulnerable ·Hewlett Packard Enterprise
- cpe:2.3:a:hp:secure_web_server_for_tru64:5.9.2:*:*:*:*:*:*:* Versions 5.9.2 Vulnerable ·Hewlett Packard Enterprise
Show 20 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:hp:secure_web_server_for_tru64:6.3.0:*:*:*:*:*:*:* | 6.3.0 | Vulnerable | Hewlett Packard Enterprise |
| cpe:2.3:o:gentoo:linux:1.4:*:*:*:*:*:*:* | 1.4 | Vulnerable | gentoo |
| cpe:2.3:o:hp:hp-ux:11.00:*:*:*:*:*:*:* | 11.00 | Vulnerable | Hewlett Packard Enterprise |
| cpe:2.3:o:hp:hp-ux:11.11:*:*:*:*:*:*:* | 11.11 | Vulnerable | Hewlett Packard Enterprise |
| cpe:2.3:o:hp:hp-ux:11.22:*:*:*:*:*:*:* | 11.22 | Vulnerable | Hewlett Packard Enterprise |
| cpe:2.3:o:hp:hp-ux:11.23:*:ia64_64-bit:*:*:*:*:* | 11.23 | Vulnerable | Hewlett Packard Enterprise |
| cpe:2.3:o:mandrakesoft:mandrake_linux:9.2:*:*:*:*:*:*:* | 9.2 | Vulnerable | Mandrakesoft |
| cpe:2.3:o:mandrakesoft:mandrake_linux:9.2:*:amd64:*:*:*:*:* | 9.2 | Vulnerable | Mandrakesoft |
| cpe:2.3:o:mandrakesoft:mandrake_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Mandrakesoft |
| cpe:2.3:o:mandrakesoft:mandrake_linux:10.0:*:amd64:*:*:*:*:* | 10.0 | Vulnerable | Mandrakesoft |
| cpe:2.3:o:redhat:enterprise_linux:3.0:*:advanced_server:*:*:*:*:* | 3.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:3.0:*:enterprise_server:*:*:*:*:* | 3.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:3.0:*:workstation_server:*:*:*:*:* | 3.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_desktop:3.0:*:*:*:*:*:*:* | 3.0 | Vulnerable | Red Hat |
| cpe:2.3:o:trustix:secure_linux:2.0:*:*:*:*:*:*:* | 2.0 | Vulnerable | Trustix |
| cpe:2.3:o:trustix:secure_linux:2.1:*:*:*:*:*:*:* | 2.1 | Vulnerable | Trustix |
| cpe:2.3:o:turbolinux:turbolinux_desktop:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Turbolinux |
| cpe:2.3:o:turbolinux:turbolinux_home:*:*:*:*:*:*:*:* | all versions | Vulnerable | Turbolinux |
| cpe:2.3:o:turbolinux:turbolinux_server:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Turbolinux |
| cpe:2.3:o:debian:debian_linux:3.0:*:*:*:*:*:*:* | 3.0 | Vulnerable | Debian |
- cpe:2.3:a:hp:secure_web_server_for_tru64:6.3.0:*:*:*:*:*:*:* Versions 6.3.0 Vulnerable ·Hewlett Packard Enterprise
- cpe:2.3:o:gentoo:linux:1.4:*:*:*:*:*:*:* Versions 1.4 Vulnerable ·gentoo
- cpe:2.3:o:hp:hp-ux:11.00:*:*:*:*:*:*:* Versions 11.00 Vulnerable ·Hewlett Packard Enterprise
- cpe:2.3:o:hp:hp-ux:11.11:*:*:*:*:*:*:* Versions 11.11 Vulnerable ·Hewlett Packard Enterprise
- cpe:2.3:o:hp:hp-ux:11.22:*:*:*:*:*:*:* Versions 11.22 Vulnerable ·Hewlett Packard Enterprise
- cpe:2.3:o:hp:hp-ux:11.23:*:ia64_64-bit:*:*:*:*:* Versions 11.23 Vulnerable ·Hewlett Packard Enterprise
- cpe:2.3:o:mandrakesoft:mandrake_linux:9.2:*:*:*:*:*:*:* Versions 9.2 Vulnerable ·Mandrakesoft
- cpe:2.3:o:mandrakesoft:mandrake_linux:9.2:*:amd64:*:*:*:*:* Versions 9.2 Vulnerable ·Mandrakesoft
- cpe:2.3:o:mandrakesoft:mandrake_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Mandrakesoft
- cpe:2.3:o:mandrakesoft:mandrake_linux:10.0:*:amd64:*:*:*:*:* Versions 10.0 Vulnerable ·Mandrakesoft
- cpe:2.3:o:redhat:enterprise_linux:3.0:*:advanced_server:*:*:*:*:* Versions 3.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:3.0:*:enterprise_server:*:*:*:*:* Versions 3.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:3.0:*:workstation_server:*:*:*:*:* Versions 3.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_desktop:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Red Hat
- cpe:2.3:o:trustix:secure_linux:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·Trustix
- cpe:2.3:o:trustix:secure_linux:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·Trustix
- cpe:2.3:o:turbolinux:turbolinux_desktop:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Turbolinux
- cpe:2.3:o:turbolinux:turbolinux_home:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Turbolinux
- cpe:2.3:o:turbolinux:turbolinux_server:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Turbolinux
- cpe:2.3:o:debian:debian_linux:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Debian
Remediation
Red Hat 1 advisory
- RHSA-2004:463 Released 2004-09-15 · Red Hat rating Moderatehttpd security update
- Red Hat Desktop version 3 httpd-2.0.46-40.ent, httpd-2.0.46-40.ent.i386, httpd-devel-2.0.46-40.ent +3
- Red Hat Enterprise Linux AS version 3 httpd-2.0.46-40.ent, httpd-2.0.46-40.ent.i386, httpd-2.0.46-40.ent.ia64 +9
- Red Hat Enterprise Linux ES version 3 httpd-2.0.46-40.ent, httpd-2.0.46-40.ent.i386, httpd-2.0.46-40.ent.ia64 +6
- Red Hat Enterprise Linux WS version 3 httpd-2.0.46-40.ent, httpd-2.0.46-40.ent.i386, httpd-2.0.46-40.ent.ia64 +6
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Desktop version 3 | Fixed | RHSA-2004:463 |
| Red Hat Enterprise Linux AS version 3 | Fixed | RHSA-2004:463 |
| Red Hat Enterprise Linux ES version 3 | Fixed | RHSA-2004:463 |
| Red Hat Enterprise Linux WS version 3 | Fixed | RHSA-2004:463 |
Timeline
- 2026-10-02 Threatist record created from CVE-2004-0809
- 2026-10-03 Alias added: GHSA-ffrj-w536-5xrc
References
Exploit 1
Patch 2
Other 13
- http://cvs.apache.org/viewcvs.cgi/httpd-2.0/modules/dav/fs/lock.c?r1=1.32&r2=1.33
- [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
- [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
- [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
- [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
- [httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/
- [httpd-cvs] 20210330 svn commit: r1073139 [3/13] - in /websites/staging/httpd/trunk/content: ./ security/json/
- [httpd-cvs] 20210330 svn commit: r1888194 [3/13] - /httpd/site/trunk/content/security/json/
- [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
- [httpd-cvs] 20210330 svn commit: r1073143 [2/3] - in /websites/staging/httpd/trunk/content: ./ security/
- [httpd-cvs] 20210330 svn commit: r1073149 [4/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/
- [httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/
- [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
Sources
- CVE-2004-0809 · CVE Program
- CVE-2004-0809 · NVD
- FIRST EPSS
- GHSA-ffrj-w536-5xrc · GitHub Advisory Database · CC BY 4.0
- CVE-2004-0809 · Red Hat security data · CC BY 4.0
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