Ipswitch WS FTP Server 2.02 FTP Command memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Ipswitch WS FTP Server 2.02. This affects an unknown function of the component FTP Command Handler. Performing a manipulation of the argument DELE/MDTM/MLST/MKD/RMD/RNFR/RNTO/SIZE/STAT/XMKD/XRMD results in memory corruption. This vulnerability is identified as CVE-2001-1021. Additionally, an exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Ipswitch WS FTP Server 2.02 (File Transfer Software). This affects an unknown code of the component FTP Command Handler. The manipulation of the argument DELE/MDTM/MLST/MKD/RMD/RNFR/RNTO/SIZE/STAT/XMKD/XRMD with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflows in WS_FTP 2.02 allow remote attackers to execute arbitrary code via long arguments to (1) DELE, (2) MDTM, (3) MLST, (4) MKD, (5) RMD, (6) RNFR, (7) RNTO, (8) SIZE, (9) STAT, (10) XMKD, or (11) XRMD.

The weakness was released 07/26/2001 by Andreas Junestam as not defined posting (Bugtraq). It is possible to read the advisory at archives.neohapsis.com. This vulnerability is uniquely identified as CVE-2001-1021. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 11094 (WS_FTP Multiple Command Long Argument Overflow), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FTP and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 27116 (WS-FTP Anonymous Multiple FTP Command Buffer Overflow Vulnerability).

Upgrading eliminates this vulnerability. Attack attempts may be identified with Snort ID 1379. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 1268.

The vulnerability is also documented in the databases at X-Force (6911), Exploit-DB (1158), Tenable (11094), SecurityFocus (BID 3102†) and OSVDB (14115†). Entry connected to this vulnerability is available at VDB-264. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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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: 11094
Nessus Name: WS_FTP Multiple Command Long Argument Overflow
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 11094
OpenVAS Name: WS FTP overflows
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Snort ID: 1379
Snort Message: PROTOCOL-FTP STAT overflow attempt
Snort Class: 🔍

Suricata ID: 2101975
Suricata Class: 🔍
Suricata Message: 🔍

TippingPoint: 🔍
SourceFire IPS: 🔍
ISS Proventia IPS: 🔍

Timelineinfo

07/25/2001 🔍
07/26/2001 +1 days 🔍
07/26/2001 +0 days 🔍
07/26/2001 +0 days 🔍
08/21/2002 +391 days 🔍
08/19/2003 +363 days 🔍
04/09/2004 +233 days 🔍
07/07/2014 +3741 days 🔍
09/30/2025 +4103 days 🔍

Sourcesinfo

Vendor: ipswitch.com

Advisory: archives.neohapsis.com
Researcher: Andreas Junestam
Status: Confirmed

CVE: CVE-2001-1021 (🔍)
GCVE (CVE): GCVE-0-2001-1021
GCVE (VulDB): GCVE-100-17091
X-Force: 6911 - WS_FTP Server long command buffer overflow
SecurityFocus: 3102 - WS-FTP Anonymous Multiple FTP Command Buffer Overflow Vulnerability
OSVDB: 14115 - WS_FTP Multiple Command Long Argument Overflow
Vulnerability Center: 1715 - Buffer overflow in WS_FTP 2.02 via Long Arguments, High

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

Entryinfo

Created: 07/07/2014 16:17
Updated: 09/30/2025 11:26
Changes: 07/07/2014 16:17 (88), 05/11/2019 16:46 (3), 01/27/2025 09:36 (18), 09/30/2025 11:26 (2)
Complete: 🔍
Cache ID: 216::103

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

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