Ncftpd FTP Server 2.4.0 PORT Command Long Argument denial of service

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Ncftpd FTP Server 2.4.0. Affected by this issue is some unknown functionality of the component PORT Command Handler. Performing a manipulation as part of Long Argument results in denial of service. This vulnerability was named CVE-1999-1568. In addition, an exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Ncftpd FTP Server 2.4.0 (File Transfer Software). It has been classified as problematic. This affects some unknown processing of the component PORT Command Handler. The manipulation as part of a Long Argument leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

Off-by-one error in NcFTPd FTP server before 2.4.1 allows a remote attacker to cause a denial of service (crash) via a long PORT command.

The weakness was presented 01/01/1999 as not defined posting (Bugtraq). The advisory is shared at marc.theaimsgroup.com. This vulnerability is uniquely identified as CVE-1999-1568. 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 are unknown but an exploit is available.

It is declared as proof-of-concept.

Upgrading to version 2.4.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (1833) and Vulnerability Center (SBV-30656†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector: 🔍

ADP CISA Base Score: 7.5
ADP CISA Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: FTP Server 2.4.1

Timelineinfo

01/01/1999 🔍
01/01/1999 +0 days 🔍
01/01/1999 +0 days 🔍
03/24/2011 +4465 days 🔍
06/20/2014 +1184 days 🔍
04/18/2026 +4320 days 🔍

Sourcesinfo

Advisory: marc.theaimsgroup.com
Status: Confirmed

CVE: CVE-1999-1568 (🔍)
GCVE (CVE): GCVE-0-1999-1568
GCVE (VulDB): GCVE-100-14433
X-Force: 1833
Vulnerability Center: 30656 - NcFTPd FTP Server before 2.4.1 Remote Denial of Service Vulnerability via a Long PORT Command, Medium

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

Entryinfo

Created: 06/20/2014 12:31
Updated: 04/18/2026 04:06
Changes: 06/20/2014 12:31 (52), 03/19/2017 20:42 (6), 01/16/2025 20:14 (38), 04/18/2026 04:06 (11)
Complete: 🔍
Cache ID: 216::103

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

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