Apache HTTP Server up to 2.0.46 IPv6 FTP Proxy infinite loop

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Apache HTTP Server up to 2.0.46. This impacts an unknown function of the component IPv6 FTP Proxy. This manipulation causes infinite loop. This vulnerability appears as CVE-2003-0254. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Apache HTTP Server up to 2.0.46 (Web Server). Affected by this vulnerability is some unknown functionality of the component IPv6 FTP Proxy. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability. The summary by CVE is:

Apache 2 before 2.0.47, when running on an IPv6 host, allows attackers to cause a denial of service (CPU consumption by infinite loop) when the FTP proxy server fails to create an IPv6 socket.

The weakness was presented 07/09/2003 by Yoshioka Tsuneo with F-Secure (Website). It is possible to read the advisory at apache.org. This vulnerability is known as CVE-2003-0254 since 05/06/2003. 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 attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 14058 (Mandrake Linux Security Advisory : apache2 (MDKSA-2003:075-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 86562 (Miscellaneous Apache Vulnerabilities (2.0.46 and earlier)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at httpd.apache.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at X-Force (12552), Tenable (14058), SecurityFocus (BID 8135†) and Vulnerability Center (SBV-1926†). See VDB-161 and VDB-162 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

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Support

  • end of life (old version)

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 14058
Nessus Name: Mandrake Linux Security Advisory : apache2 (MDKSA-2003:075-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: httpd.apache.org

Timelineinfo

05/06/2003 🔍
07/09/2003 +64 days 🔍
07/09/2003 +0 days 🔍
08/18/2003 +40 days 🔍
08/18/2003 +0 days 🔍
09/04/2003 +17 days 🔍
08/23/2025 +8024 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: apache.org
Researcher: Yoshioka Tsuneo
Organization: F-Secure
Status: Confirmed

CVE: CVE-2003-0254 (🔍)
GCVE (CVE): GCVE-0-2003-0254
GCVE (VulDB): GCVE-100-163

OVAL: 🔍

X-Force: 12552
SecurityFocus: 8135
Vulnerability Center: 1926 - DoS in Apache 2.0-2.0.46 on IPv6 Host via Wrong Handling of the FTP Proxy, Medium

See also: 🔍

Entryinfo

Created: 07/09/2003 02:00
Updated: 08/23/2025 21:28
Changes: 07/09/2003 02:00 (68), 04/16/2019 15:10 (7), 03/08/2021 13:59 (2), 08/23/2025 21:28 (18)
Complete: 🔍
Cache ID: 216:C83:103

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

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