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CVE-2004-0809

21
FAUCET Score

CVE-2004-0809 describes a denial-of-service vulnerability in the mod_dav module of Apache 2.0.50 and earlier, impacting various Linux distributions and Apache installations. An unauthenticated remote attacker can crash a child process by sending a specific sequence of LOCK requests to a WebDAV-enabled location. This vulnerability has a CVSS score of 5.0, indicating a medium severity with low attack complexity and potential for partial availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.35, < 2.0.51CPE matchmatch criteria
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
4.0_fCPE matchmatch criteria
cpe:2.3:a:hp:secure_web_server_for_tru64:4.0_f:*:*:*:*:*:*:*
4.0_gCPE matchmatch criteria
cpe:2.3:a:hp:secure_web_server_for_tru64:4.0_g:*:*:*:*:*:*:*
5.0_aCPE matchmatch criteria
cpe:2.3:a:hp:secure_web_server_for_tru64:5.0_a:*:*:*:*:*:*:*
5.1CPE matchmatch criteria
cpe:2.3:a:hp:secure_web_server_for_tru64:5.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
15.46%
Probability of exploitation in next 30 days
EPSS Percentile
96.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.1546 is in the 96th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

debianpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: httpd-0:2.0.46-40.ent
View patch

Vendor Advisories (1)

redhatCVE-2004-0809Low

security flaw

Sep 15, 2004

References

cvs.apache.org / viewcvs.cgi/httpd-2.0/modules/dav/fs/lock.c
Broken Link
exchange.xforce.ibmcloud.com / vulnerabilities/17366
Third Party AdvisoryVDB Entry
lists.apache.org / thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af93e9ac%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec232489e7f79%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r0276683d8e1e07153fc8642618830ac0ade85b9ae0dc7b07f63bb8fc%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r2cb985de917e7da0848c440535f65a247754db8b2154a10089e4247b%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r5001ecf3d6b2bdd0b732e527654248abb264f08390045d30709a92f6%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r734a07156abf332d5ab27fb91d9d962cacfef4f3681e44056f064fa8%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r8828e649175df56f1f9e3919938ac7826128525426e2748f0ab62feb%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r9e8622254184645bc963a1d47c5d47f6d5a36d6f080d8d2c43b2b142%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/rd65d8ba68ba17e7deedafbf5bb4899f2ae4dad781d21b931c2941ac3%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/re895fc1736d25c8cf57e102c871613b8aeec9ea26fd8a44e7942b5ab%40%3Ccvs.httpd.apache.org%3E
lists.apache.org / thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9588
Third Party Advisory
debian.org / security/2004/dsa-558
PatchVendor Advisory
gentoo.org / security/en/glsa/glsa-200409-21.xml
PatchVendor Advisory
mandrakesecure.net / en/advisories/advisory.php
Broken Link
redhat.com / support/errata/RHSA-2004-463.html
Third Party Advisory
trustix.org / errata/2004/0047
Broken LinkExploitPatchVendor Advisory