wu-ftpd 2.5.0/2.6.0/2.6.1/2.6.2 fb_realpath memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability classified as critical was found in wu-ftpd 2.5.0/2.6.0/2.6.1/2.6.2 (File Transfer Software). Affected by this vulnerability is the function fb_realpath. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 07/31/2003 by Wojciech Purczynski and Janusz Niewiadomski (intuit) with iSEC Security Research (Website). The advisory is shared at isec.pl. This vulnerability is known as CVE-2003-0466 since 06/26/2003. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

It is declared as proof-of-concept. It is possible to download the exploit at securiteam.com. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 16907 (HP-UX PHNE_29462 : s700_800 11.22 ftpd(1M) and ftp(1) patch), which helps to determine the existence of the flaw in a target environment. It is assigned to the family HP-UX Local Security Checks and running in the context local.

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at ftp.wu-ftpd.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 11 months after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 2392. In this case the pattern RETR is used for detection.

The vulnerability is also documented in the databases at SecurityFocus (BID 9666), X-Force (15252), Secunia (SA9406), SecurityTracker (ID 1007380) and Tenable (16907). Additional details are provided at tecchannel.de. The entries 218, 22442 and 82042 are pretty similar.




CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
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Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

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Nessus ID: 16907
Nessus Name: HP-UX PHNE_29462 : s700_800 11.22 ftpd(1M) and ftp(1) patch
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OpenVAS ID: 53646
OpenVAS Name: Debian Security Advisory DSA 357-1 (wu-ftpd)
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Threat Intelligenceinfoedit

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Recommended: Upgrade
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Patch: ftp.wu-ftpd.org

Snort ID: 2392
Snort Message: FTP RETR overflow attempt
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Suricata ID: 2102391
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06/26/2003 🔍
07/31/2003 +35 days 🔍
08/01/2003 +1 days 🔍
08/04/2003 +3 days 🔍
08/05/2003 +1 days 🔍
08/27/2003 +22 days 🔍
02/16/2004 +173 days 🔍
02/19/2004 +3 days 🔍
06/03/2004 +104 days 🔍
02/16/2005 +258 days 🔍
06/26/2019 +5243 days 🔍


Advisory: isec.pl
Researcher: Wojciech Purczynski/Janusz Niewiadomski (intuit)
Organization: iSEC Security Research
Status: Confirmed

CVE: CVE-2003-0466 (🔍)

SecurityFocus: 9666 - ACLogic CesarFTP Remote Resource Exhaustion Vulnerability
Secunia: 9406 - WU-FTPD "fb_realpath" Buffer Overflow Vulnerability, Highly Critical
X-Force: 15252 - CesarFTP user:pass command denial of service, Medium Risk
SecurityTracker: 1007380
OSVDB: 3999 - Cesar FTP RETR Command Handling DoS
SecuriTeam: securiteam.com

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Created: 08/05/2003 11:45 AM
Updated: 06/26/2019 10:47 AM
Changes: (1) countermeasure_date
Complete: 🔍


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