Mailenable Enterprise 2.0 NTLM Authentication memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Mailenable Enterprise 2.0. Affected is an unknown function of the component NTLM Authentication. Such manipulation leads to memory corruption. This vulnerability is documented as CVE-2006-5176. Additionally, an exploit exists.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Mailenable Enterprise 2.0 (Mail Server Software). Affected by this issue is some unknown functionality of the component NTLM Authentication. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in NTLM authentication in MailEnable Professional 2.0 and Enterprise 2.0 allows remote attackers to execute arbitrary code via "the signature field of NTLM Type 1 messages".

The bug was discovered 09/29/2006. The weakness was released 10/10/2006 by Mu Security with Mu Security research team (Website). The advisory is shared for download at xforce.iss.net. This vulnerability is handled as CVE-2006-5176 since 10/05/2006. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/23/2026).

A public exploit has been developed in Perl. The exploit is available at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 22483 (MailEnable SMTP Connector Multiple NTLM Authentication Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SMTP problems and running in the context r.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 9048.

The vulnerability is also documented in the databases at X-Force (29284), Tenable (22483), SecurityFocus (BID 20290†), OSVDB (29432†) and Secunia (SA22179†). Entries connected to this vulnerability are available at VDB-2707, VDB-2728, VDB-2727 and VDB-2767. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.1

VulDB Base Score: 10.0
VulDB Temp Score: 9.1
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: Memory corruption
CWE: 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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Nessus ID: 22483
Nessus Name: MailEnable SMTP Connector Multiple NTLM Authentication Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
TippingPoint: 🔍
ISS Proventia IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

09/29/2006 🔍
09/29/2006 +0 days 🔍
10/02/2006 +3 days 🔍
10/02/2006 +0 days 🔍
10/05/2006 +3 days 🔍
10/09/2006 +4 days 🔍
10/10/2006 +1 days 🔍
10/10/2006 +0 days 🔍
03/12/2015 +3075 days 🔍
04/23/2026 +4060 days 🔍

Sourcesinfo

Advisory: xforce.iss.net
Researcher: Mu Security
Organization: Mu Security research team
Status: Not defined
Confirmation: 🔍

CVE: CVE-2006-5176 (🔍)
GCVE (CVE): GCVE-0-2006-5176
GCVE (VulDB): GCVE-100-32636
X-Force: 29284
SecurityFocus: 20290 - MailEnable SMTP NTLM Authentication Multiple Vulnerabilities
Secunia: 22179
OSVDB: 29432 - MailEnable NTLM message buffer overflow
Vulnerability Center: 12852 - MailEnable NTLM type1 message Code Execution Vulnerability, Medium
Vupen: ADV-2006-3862

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

Entryinfo

Created: 03/12/2015 15:51
Updated: 04/23/2026 18:28
Changes: 03/12/2015 15:51 (73), 07/09/2019 06:52 (8), 04/23/2026 18:28 (20)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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