Cat Soft Serv-U FTP Server 2.5a SITE 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 categorized as critical has been discovered in Cat Soft Serv-U FTP Server 2.5a. Affected by this issue is some unknown functionality of the component SITE Command Handler. Executing a manipulation can lead to memory corruption. This vulnerability is handled as CVE-1999-0838. Additionally, an exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Cat Soft Serv-U FTP Server 2.5a (File Transfer Software) and classified as critical. This vulnerability affects an unknown functionality of the component SITE Command Handler. 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. CVE summarizes:

Buffer overflow in Serv-U FTP 2.5 allows remote users to conduct a denial of service via the SITE command.

The weakness was released 12/01/1999 by Ussr Labs (Website). The advisory is shared for download at securityfocus.com. This vulnerability was named CVE-1999-0838. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available.

It is possible to download the exploit at securityfocus.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 11392 (Serv-U < 2.5e Multiple Vulnerabilities (OF, Path Disc)), 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 27372 (Serv-U FTP Server SITE PASS Denial Of Service Vulnerability).

Upgrading to version 2.5b eliminates this vulnerability. Attack attempts may be identified with Snort ID 1529.

The vulnerability is also documented in the databases at X-Force (3647), Exploit-DB (19664), Tenable (11392), SecurityFocus (BID 859†) and Vulnerability Center (SBV-1700†). Entry connected to this vulnerability is available at VDB-15361. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

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: 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: 🔍
VulDB Reliability: 🔍

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: 11392
Nessus Name: Serv-U < 2.5e Multiple Vulnerabilities (OF, Path Disc)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Serv-U FTP Server 2.5b

Snort ID: 1529
Snort Message: PROTOCOL-FTP SITE overflow attempt
Snort Class: 🔍

Suricata ID: 2102340
Suricata Class: 🔍
Suricata Message: 🔍
SourceFire IPS: 🔍
ISS Proventia IPS: 🔍

Timelineinfo

12/01/1999 🔍
12/01/1999 +0 days 🔍
12/01/1999 +0 days 🔍
12/02/1999 +1 days 🔍
03/15/2003 +1199 days 🔍
08/18/2003 +156 days 🔍
06/22/2014 +3961 days 🔍
10/22/2025 +4140 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Researcher: Ussr Labs
Status: Confirmed

CVE: CVE-1999-0838 (🔍)
GCVE (CVE): GCVE-0-1999-0838
GCVE (VulDB): GCVE-100-15016
X-Force: 3647
SecurityFocus: 859 - Serv-U FTP Server SITE PASS DoS Vulnerability
Vulnerability Center: 1700 - Buffer overflow in Serv-U FTP Server 2.5, Medium

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

Entryinfo

Created: 06/22/2014 15:31
Updated: 10/22/2025 20:47
Changes: 06/22/2014 15:31 (77), 05/11/2019 16:04 (2), 01/15/2025 22:52 (19), 10/22/2025 20:47 (2)
Complete: 🔍
Cache ID: 216:DA7:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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