QPC Software QVT Term Plus 4.3 Username/Password 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 was found in QPC Software QVT Term Plus 4.3. It has been classified as critical. Affected by this vulnerability is an unknown functionality. This manipulation of the argument Username/Password causes memory corruption. This vulnerability is handled as CVE-1999-1539. Additionally, an exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in QPC Software QVT Term Plus 4.3 and classified as critical. Affected by this vulnerability is an unknown code block. The manipulation of the argument Username/Password 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 summary by CVE is:

Buffer overflow in FTP server in QPC Software's QVT/Term Plus versions 4.2d and 4.3 and QVT/Net 4.3 allows remote attackers to cause a denial of service, and possibly execute arbitrary commands, via a long (1) user name or (2) password.

The weakness was released 11/10/1999 by Ussr Labs as not defined posting (Bugtraq). It is possible to read the advisory at marc.theaimsgroup.com. This vulnerability is known as CVE-1999-1539. The exploitation appears to be easy. 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 securityfocus.com. It is declared as proof-of-concept.

Upgrading eliminates this vulnerability. Attack attempts may be identified with Snort ID 1734.

The vulnerability is also documented in the databases at X-Force (3491), Exploit-DB (19619), SecurityFocus (BID 796†) and Vulnerability Center (SBV-756†). Statistical analysis made it clear that VulDB provides the best quality 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: 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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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Suricata ID: 2101972
Suricata Class: 🔍
Suricata Message: 🔍
SourceFire IPS: 🔍

Timelineinfo

11/10/1999 🔍
11/10/1999 +0 days 🔍
11/10/1999 +0 days 🔍
11/10/1999 +0 days 🔍
01/29/2003 +1176 days 🔍
06/22/2014 +4162 days 🔍
04/19/2026 +4319 days 🔍

Sourcesinfo

Advisory: marc.theaimsgroup.com
Researcher: Ussr Labs
Status: Confirmed

CVE: CVE-1999-1539 (🔍)
GCVE (CVE): GCVE-0-1999-1539
GCVE (VulDB): GCVE-100-14971
X-Force: 3491 - QVT FTP server login overflow denial of service
SecurityFocus: 796 - QPC QVT Suite FTP Server DoS Vulnerability
Vulnerability Center: 756 - QPC QVT Suite FTP Server DoS Vulnerability, Critical

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

Entryinfo

Created: 06/22/2014 14:48
Updated: 04/19/2026 19:06
Changes: 06/22/2014 14:48 (69), 05/08/2019 16:12 (2), 01/22/2025 14:51 (19), 04/19/2026 19:06 (1)
Complete: 🔍
Cache ID: 216::103

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

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