Qksoft QK SMTP up to 3.01 stack-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Qksoft QK SMTP up to 3.01. The impacted element is an unknown function. Performing a manipulation results in stack-based overflow. This vulnerability is known as CVE-2006-5551. Furthermore, an exploit is available.

Detailsinfo

A vulnerability classified as critical has been found in Qksoft QK SMTP up to 3.01. This affects an unknown functionality. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Stack-based buffer overflow in QK SMTP 3.01 and earlier might allow remote attackers to execute arbitrary code via a long argument to the RCPT TO command.

The weakness was published 10/26/2006 by Greg Linares (Website). The advisory is shared at vupen.com. This vulnerability is uniquely identified as CVE-2006-5551 since 10/26/2006. 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 a public exploit is available.

A public exploit has been developed in ANSI C. The exploit is shared for download at securityfocus.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (2625), SecurityFocus (BID 20681†), Secunia (SA22563†) and SecurityTracker (ID 1017114†). Several companies clearly confirm that VulDB is the primary source for best 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: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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OpenVAS ID: 2000201
OpenVAS Name: QK SMTP Server RCPT TO buffer overflow vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/23/2006 🔍
10/24/2006 +1 days 🔍
10/25/2006 +1 days 🔍
10/26/2006 +1 days 🔍
10/26/2006 +0 days 🔍
10/26/2006 +0 days 🔍
03/12/2015 +3059 days 🔍
04/25/2026 +4062 days 🔍

Sourcesinfo

Advisory: vupen.com⛔
Researcher: Greg Linares
Status: Not defined

CVE: CVE-2006-5551 (🔍)
GCVE (CVE): GCVE-0-2006-5551
GCVE (VulDB): GCVE-100-32985
SecurityFocus: 20681 - QK SMTP Remote Buffer Overflow Vulnerability
Secunia: 22563 - QK SMTP Server "RCPT TO:" Buffer Overflow Vulnerability, Highly Critical
SecurityTracker: 1017114 - QK SMTP Server 'RCPT TO' Command Lets Remote Users Deny Service
Vupen: ADV-2006-4169

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

Entryinfo

Created: 03/12/2015 22:21
Updated: 04/25/2026 15:45
Changes: 03/12/2015 22:21 (60), 09/28/2017 09:19 (7), 08/01/2024 14:01 (19), 12/21/2024 04:44 (4), 04/25/2026 15:45 (2)
Complete: 🔍
Cache ID: 216::103

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

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