FaSTream FTP++ Server 2.0 Username privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability was found in FaSTream FTP++ Server 2.0. It has been classified as critical. This issue affects some unknown processing. This manipulation of the argument Username causes privileges management. This vulnerability is registered as CVE-2001-0256. No exploit is available. It is advisable to implement restrictive firewalling.

Detailsinfo

A vulnerability has been found in FaSTream FTP++ Server 2.0 and classified as critical. Affected by this vulnerability is an unknown code block. The manipulation of the argument Username with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

FaSTream FTP++ Server 2.0 allows remote attackers to cause a denial of service, and possibly execute arbitrary commands, via a long username.

The bug was discovered 09/12/2000. The weakness was published 06/02/2001 as not defined posting (Bugtraq). It is possible to read the advisory at marc.theaimsgroup.com. This vulnerability is known as CVE-2001-0256. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 263 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 27054 (Fastream FTP++ Denial of Service Vulnerability).

Proper firewalling of is able to address this issue. Attack attempts may be identified with Snort ID 1734.

The vulnerability is also documented in the databases at X-Force (5976), SecurityFocus (BID 2261†), OSVDB (12102†) and Vulnerability Center (SBV-6025†). Similar entries are available at VDB-16733 and VDB-16734. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.1

VulDB Base Score: 7.3
VulDB Temp Score: 7.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
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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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔍
Snort ID: 1734
Snort Message: PROTOCOL-FTP USER overflow attempt
Snort Class: 🔍

Suricata ID: 2101734
Suricata Class: 🔍
Suricata Message: 🔍
SourceFire IPS: 🔍

Timelineinfo

09/12/2000 🔍
01/19/2001 +129 days 🔍
01/22/2001 +3 days 🔍
06/02/2001 +131 days 🔍
06/02/2001 +0 days 🔍
11/24/2004 +1271 days 🔍
07/04/2014 +3509 days 🔍
10/07/2025 +4113 days 🔍

Sourcesinfo

Advisory: marc.theaimsgroup.com
Status: Not defined

CVE: CVE-2001-0256 (🔍)
GCVE (CVE): GCVE-0-2001-0256
GCVE (VulDB): GCVE-100-16735
X-Force: 5976 - Fastream FTP denial of service
SecurityFocus: 2261 - Fastream FTP++ Denial of Service Vulnerability
OSVDB: 12102 - Fastream FTP denial of service
Vulnerability Center: 6025 - FaSTream FTP++ Server 2.0 Allows DoS, Medium

See also: 🔍

Entryinfo

Created: 07/04/2014 12:29
Updated: 10/07/2025 15:14
Changes: 07/04/2014 12:29 (69), 06/03/2019 10:48 (3), 10/07/2025 15:14 (18)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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