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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8.8$0-$5k0.00

Summaryinfo

A vulnerability was found in wu-ftpd 2.5.0/2.6.0/2.6.1/2.6.2. It has been rated as critical. This affects the function fb_realpath. This manipulation causes memory corruption. This vulnerability is tracked as CVE-2003-0466. The attack is possible to be carried out remotely. Moreover, an exploit is present. Upgrading the affected component is advised.

Detailsinfo

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. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. 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 possible to download the exploit at securiteam.com. It is declared as proof-of-concept. 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 l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 27200 (WU-FTPD FB_RealPath Off-By-One Buffer Overflow Vulnerability).

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 X-Force (15252), Exploit-DB (22976), Tenable (16907), SecurityFocus (BID 9666†) and OSVDB (3999†). Additional details are provided at tecchannel.de. The entries VDB-218, VDB-22442 and VDB-82042 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 9.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 16907
Nessus Name: HP-UX PHNE_29462 : s700_800 11.22 ftpd(1M) and ftp(1) patch
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 53646
OpenVAS Name: Debian Security Advisory DSA 357-1 (wu-ftpd)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Patch: ftp.wu-ftpd.org

Snort ID: 2392
Snort Message: FTP RETR overflow attempt
Snort Class: 🔍
Snort Pattern: 🔍

Suricata ID: 2102391
Suricata Class: 🔍
Suricata Message: 🔍

Timelineinfo

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 🔍
08/13/2025 +7483 days 🔍

Sourcesinfo

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

CVE: CVE-2003-0466 (🔍)
GCVE (CVE): GCVE-0-2003-0466
GCVE (VulDB): GCVE-100-217

OVAL: 🔍

CERT: 🔍
X-Force: 15252 - CesarFTP user:pass command denial of service, Medium Risk
SecurityFocus: 9666 - ACLogic CesarFTP Remote Resource Exhaustion Vulnerability
Secunia: 9406 - WU-FTPD "fb_realpath" Buffer Overflow Vulnerability, Highly Critical
OSVDB: 3999 - Cesar FTP RETR Command Handling DoS
SecurityTracker: 1007380
SecuriTeam: securiteam.com
Vulnerability Center: 1678

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 08/05/2003 11:45
Updated: 08/13/2025 15:46
Changes: 08/05/2003 11:45 (104), 06/26/2019 10:47 (1), 03/08/2021 15:42 (2), 06/17/2024 23:24 (17), 08/29/2024 23:00 (1), 10/31/2024 13:21 (18), 12/26/2024 13:13 (1), 08/13/2025 15:46 (2)
Complete: 🔍
Cache ID: 216:E8E:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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