Microsoft Windows VML Vector Markup Language heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

A vulnerability, which was classified as critical, has been found in Microsoft Windows (Operating System) (affected version unknown). Affected by this issue is an unknown functionality of the component VML Vector Markup Language Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. CVE summarizes:

Integer underflow in the CDownloadSink class code in the Vector Markup Language (VML) component (VGX.DLL), as used in Internet Explorer 5.01, 6, and 7 allows remote attackers to execute arbitrary code via compressed content with an invalid buffer size, which triggers a heap-based buffer overflow.

The bug was discovered 08/14/2007. The weakness was disclosed 08/14/2007 by Derek Soeder with Microsoft as MS07-050 as confirmed bulletin (Technet). The advisory is available at microsoft.com. This vulnerability is handled as CVE-2007-1749 since 03/29/2007. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 25886 (MS07-050: Vulnerability in Vector Markup Language Could Allow Remote Code Execution (938127)), 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 90405 (Microsoft XML Core Services Could Allow Remote Code Execution (MS07-042)).

Upgrading eliminates this vulnerability. Applying the patch MS07-050 is able to eliminate this problem. The bugfix is ready for download at microsoft.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 12282. In this case the pattern vmlframe is used for detection. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 5524.

The vulnerability is also documented in the databases at X-Force (35762), Tenable (25886), SecurityFocus (BID 25310†), OSVDB (36390†) and Secunia (SA26409†). The entry VDB-3252 is pretty similar.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

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

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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 25886
Nessus Name: MS07-050: Vulnerability in Vector Markup Language Could Allow Remote Code Execution (938127)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 102059
OpenVAS Name: Microsoft Windows Vector Markup Language Buffer Overflow (938127)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Patch: MS07-050

Snort ID: 12282
Snort Message: WEB-CLIENT VML source file memory corruption
Snort Pattern: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

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

Timelineinfo

03/29/2007 🔍
08/14/2007 +138 days 🔍
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08/15/2007 +0 days 🔍
08/20/2007 +5 days 🔍
01/13/2025 +6355 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS07-050
Researcher: Derek Soeder
Organization: Microsoft
Status: Confirmed

CVE: CVE-2007-1749 (🔍)
OVAL: 🔍
IAVM: 🔍

CERT: 🔍
X-Force: 35762
SecurityFocus: 25310 - Microsoft Internet Explorer Vector Markup Language VGX.DLL Remote Buffer Overflow Vulnerability
Secunia: 26409
OSVDB: 36390 - Microsoft Windows Vector Markup Language (VML) VGX.DLL CDownloadSink Class Overflow
SecurityTracker: 1018568
Vulnerability Center: 15870 - [MS07-050] Microsoft Internet Explorer VML Component Integer Underflow Allows Code Execution, Medium
Vupen: ADV-2007-2874

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

Entryinfo

Created: 08/20/2007 08:42 AM
Updated: 01/13/2025 12:36 AM
Changes: 08/20/2007 08:42 AM (109), 07/23/2019 03:39 PM (1), 03/15/2021 04:34 PM (3), 01/13/2025 12:36 AM (17)
Complete: 🔍
Cache ID: 18:A61:40

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