Microsoft Windows Server 2003/XP mhtml URI inetcomm.dll 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 Microsoft Windows Server 2003/XP. It has been rated as critical. This impacts an unknown function in the library inetcomm.dll of the component mhtml URI Handler. This manipulation causes memory corruption. This vulnerability is registered as CVE-2006-2766. Furthermore, an exploit is available.

Detailsinfo

A vulnerability was found in Microsoft Windows Server 2003/XP (Operating System). It has been declared as critical. Affected by this vulnerability is an unknown function in the library inetcomm.dll of the component mhtml URI 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. The summary by CVE is:

Buffer overflow in INETCOMM.DLL, as used in Microsoft Internet Explorer 6.0 through 6.0 SP2, Windows Explorer, Outlook Express 6, and possibly other programs, allows remote user-assisted attackers to cause a denial of service (application crash) via a long mhtml URI in the URL value in a URL file.

The weakness was published 06/01/2006 by Mr.Niega as confirmed posting (Bugtraq). It is possible to read the advisory at securityfocus.com. This vulnerability is known as CVE-2006-2766 since 06/01/2006. 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. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 22185 (MS06-043: Vulnerability in Microsoft Windows Could Allow Remote Code Execution (920214)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 90340 (Microsoft Windows Remote Code Execution Vulnerability (MS06-043)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at windowsupdate.microsoft.com. A possible mitigation has been published 3 months after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 6509. In this case the pattern mhtml|3A|// is used for detection. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 4592.

The vulnerability is also documented in the databases at X-Force (26810), Tenable (22185), SecurityFocus (BID 18198†), OSVDB (25949†) and Secunia (SA20384†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Support

  • end of life (old version)

Website

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: 🔍
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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: 22185
Nessus Name: MS06-043: Vulnerability in Microsoft Windows Could Allow Remote Code Execution (920214)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: windowsupdate.microsoft.com

Snort ID: 6509
Snort Message: WEB-CLIENT Internet Explorer mhtml uri href buffer overflow attempt
Snort Pattern: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

05/31/2006 🔍
05/31/2006 +0 days 🔍
06/01/2006 +1 days 🔍
06/01/2006 +0 days 🔍
06/01/2006 +0 days 🔍
06/01/2006 +0 days 🔍
06/02/2006 +0 days 🔍
06/02/2006 +0 days 🔍
06/18/2006 +16 days 🔍
08/08/2006 +51 days 🔍
08/08/2006 +0 days 🔍
08/08/2006 +0 days 🔍
06/21/2025 +6892 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: securityfocus.com⛔
Researcher: Mr.Niega
Status: Confirmed

CVE: CVE-2006-2766 (🔍)
GCVE (CVE): GCVE-0-2006-2766
GCVE (VulDB): GCVE-100-2275

OVAL: 🔍

CERT: 🔍
X-Force: 26810 - Microsoft Internet Explorer mhtml://mid URL buffer overflow, High Risk
SecurityFocus: 18198 - Microsoft Windows MHTML URI Buffer Overflow Vulnerability
Secunia: 20384 - Microsoft Windows "mhtml:" URI Buffer Overflow Vulnerability, Highly Critical
OSVDB: 25949 - Microsoft Windows INETCOMM.DLL mhtml: URI Overflow
SecurityTracker: 1016654
Vulnerability Center: 11935 - [MS06-043] Microsoft Internet Explorer Remote User Complicit DoS via a Long mhtml:mid: URL, Medium
Vupen: ADV-2006-2088

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

Entryinfo

Created: 06/02/2006 13:21
Updated: 06/21/2025 23:01
Changes: 06/02/2006 13:21 (107), 06/20/2019 18:15 (1), 01/20/2025 16:24 (17), 06/21/2025 23:01 (2)
Complete: 🔍
Cache ID: 216::103

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

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