Apache HTTP Server up to 2.0.50 mod_dav denial of service

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Apache HTTP Server up to 2.0.50. Affected is an unknown function of the component mod_dav. This manipulation causes denial of service. The identification of this vulnerability is CVE-2004-0809. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apache HTTP Server up to 2.0.50 (Web Server). It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component mod_dav. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

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.

The weakness was shared 09/16/2004 (Website). It is possible to read the advisory at gentoo.org. This vulnerability is known as CVE-2004-0809 since 08/25/2004. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 15656 (Debian DSA-558-1 : libapache-mod-dav - NULL pointer dereference), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 86678 (Multiple Apache Web Server Vulnerabilities prior to version 2.0.51).

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (17366), Tenable (15656), SecurityFocus (BID 11185†) and Vulnerability Center (SBV-5437†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Support

  • end of life (old version)

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 15656
Nessus Name: Debian DSA-558-1 : libapache-mod-dav - NULL pointer dereference
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 53248
OpenVAS Name: Debian Security Advisory DSA 558-1 (libapache-mod-dav)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

08/25/2004 🔍
09/14/2004 +20 days 🔍
09/15/2004 +1 days 🔍
09/16/2004 +1 days 🔍
09/16/2004 +0 days 🔍
09/21/2004 +5 days 🔍
10/06/2004 +15 days 🔍
11/10/2004 +35 days 🔍
12/19/2014 +3691 days 🔍
07/11/2025 +3857 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: gentoo.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2004-0809 (🔍)
GCVE (CVE): GCVE-0-2004-0809
GCVE (VulDB): GCVE-100-22219

OVAL: 🔍

X-Force: 17366
SecurityFocus: 11185 - Apache Mod_DAV LOCK Denial Of Service Vulnerability
Vulnerability Center: 5437 - DoS in Apache 2.0.50 mod_dav Module via LOCK Requests, High

Entryinfo

Created: 12/19/2014 12:07
Updated: 07/11/2025 20:54
Changes: 12/19/2014 12:07 (72), 05/24/2019 22:13 (4), 07/11/2025 20:54 (20)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!