IBM HTTP Server 2.0.42/2.0.47 apr-util Environment Variable denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in IBM HTTP Server 2.0.42/2.0.47 and classified as problematic. The affected element is an unknown function of the component apr-util. The manipulation as part of Environment Variable leads to denial of service. This vulnerability is documented as CVE-2004-0786. The attack needs to be performed locally. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in IBM HTTP Server 2.0.42/2.0.47 (Web Server) and classified as problematic. This issue affects an unknown part of the component apr-util. The manipulation as part of a Environment Variable leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

The IPv6 URI parsing routines in the apr-util library for Apache 2.0.50 and earlier allow remote attackers to cause a denial of service (child process crash) via a certain URI, as demonstrated using the Codenomicon HTTP Test Tool.

The bug was discovered 09/15/2004. The weakness was released 10/22/2004 with IBM (Website). The advisory is shared at www-1.ibm.com. The identification of this vulnerability is CVE-2004-0786 since 08/17/2004. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 14765 (Fedora Core 2 : apr-util-0.9.4-14.2 (2004-308)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora 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 to version 2.0.51 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at www-1.ibm.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published even before and not after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 5715. In this case the pattern |3A|/[ is used for detection. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 31460.

The vulnerability is also documented in the databases at X-Force (17382), Tenable (14765), SecurityFocus (BID 11187†), OSVDB (9994†) and Secunia (SA12922†). Entry connected to this vulnerability is available at VDB-844. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.6

VulDB Base Score: 6.2
VulDB Temp Score: 5.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 14765
Nessus Name: Fedora Core 2 : apr-util-0.9.4-14.2 (2004-308)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 52388
OpenVAS Name: FreeBSD Ports: apache
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: HTTP Server 2.0.51
Patch: www-1.ibm.com

Snort ID: 5715
Snort Message: WEB-MISC malformed ipv6 uri overflow attempt
Snort Pattern: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍

Timelineinfo

08/17/2004 🔍
09/15/2004 +29 days 🔍
09/15/2004 +0 days 🔍
09/15/2004 +0 days 🔍
09/15/2004 +0 days 🔍
09/16/2004 +0 days 🔍
09/16/2004 +0 days 🔍
09/17/2004 +1 days 🔍
09/21/2004 +4 days 🔍
10/20/2004 +29 days 🔍
10/22/2004 +2 days 🔍
10/22/2004 +0 days 🔍
10/25/2004 +3 days 🔍
07/11/2025 +7564 days 🔍

Sourcesinfo

Vendor: ibm.com

Advisory: www-1.ibm.com
Researcher: http://www.ibm.com
Organization: IBM
Status: Confirmed

CVE: CVE-2004-0786 (🔍)
GCVE (CVE): GCVE-0-2004-0786
GCVE (VulDB): GCVE-100-941

OVAL: 🔍

X-Force: 17382 - Apache HTTP Server IPv6 apr_util denial of service, Medium Risk
SecurityFocus: 11187 - Apache Web Server Remote IPv6 Buffer Overflow Vulnerability
Secunia: 12922 - IBM HTTP Server apr-util Library and Environment Variable Expansion Vulnerabilities, Less Critical
OSVDB: 9994 - Apache HTTP Server apr-util IPV6 Parsing DoS
SecurityTracker: 1011299
Vulnerability Center: 5433 - Buffer Overflow in Apache 2.0.50 and Earlier via Wrong IPv6 URI Parsing, High

See also: 🔍

Entryinfo

Created: 10/25/2004 12:52
Updated: 07/11/2025 20:45
Changes: 10/25/2004 12:52 (108), 06/29/2019 17:58 (3), 07/11/2025 20:45 (18)
Complete: 🔍
Cache ID: 216:7FC:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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