Microsoft Internet Explorer 6/7/8 VML Vector Markup Language memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Microsoft Internet Explorer 6/7/8. Affected by this issue is some unknown functionality of the component VML Vector Markup Language Handler. The manipulation results in memory corruption. This vulnerability was named CVE-2011-1266. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in Microsoft Internet Explorer 6/7/8 (Web Browser). Affected is an unknown function of the component VML Vector Markup Language Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The Vector Markup Language (VML) implementation in vgx.dll in Microsoft Internet Explorer 6 through 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, aka "VML Memory Corruption Vulnerability."

The weakness was presented 06/14/2011 with ZDI (Website). The advisory is shared for download at zerodayinitiative.com. This vulnerability is traded as CVE-2011-1266 since 03/04/2011. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 55132 (MS11-052: Vulnerability in Vector Markup Language Could Allow Remote Code Execution (2544521)), 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 100102 (Microsoft Internet Explorer Vector Markup Language Remote Code Execution Vulnerability (MS11-052)).

Upgrading eliminates this vulnerability. Applying the patch MS11-052 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. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 11254. The filter is assigned to the category Exploits.

The vulnerability is also documented in the databases at X-Force (67943), Tenable (55132), SecurityFocus (BID 48173†), Secunia (SA44920†) and Vulnerability Center (SBV-31803†). See VDB-4372 for similar entry. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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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: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 55132
Nessus Name: MS11-052: Vulnerability in Vector Markup Language Could Allow Remote Code Execution (2544521)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 900290
OpenVAS Name: Internet Explorer Vector Markup Language Remote Code Execution Vulnerability (2544521)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Patch: MS11-052
TippingPoint: 🔍
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ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
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Timelineinfo

03/04/2011 🔍
06/14/2011 +101 days 🔍
06/14/2011 +0 days 🔍
06/14/2011 +0 days 🔍
06/14/2011 +0 days 🔍
06/15/2011 +1 days 🔍
06/15/2011 +0 days 🔍
06/16/2011 +1 days 🔍
06/20/2011 +4 days 🔍
01/15/2025 +4958 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: zerodayinitiative.com
Organization: ZDI
Status: Confirmed

CVE: CVE-2011-1266 (🔍)
GCVE (CVE): GCVE-0-2011-1266
GCVE (VulDB): GCVE-100-4368

OVAL: 🔍

X-Force: 67943
SecurityFocus: 48173
Secunia: 44920 - Internet Explorer Vector Markup Language Use-After-Free Vulnerability, Highly Critical
Vulnerability Center: 31803 - [MS11-052] Microsoft Internet Explorer Remote Memory Corruption Vulnerability via VML Objects, Medium

See also: 🔍

Entryinfo

Created: 06/20/2011 02:00
Updated: 01/15/2025 17:36
Changes: 06/20/2011 02:00 (53), 04/07/2017 12:02 (30), 03/19/2021 11:27 (7), 03/19/2021 11:32 (2), 03/19/2021 11:36 (1), 01/15/2025 17:36 (18)
Complete: 🔍
Cache ID: 216:46D:103

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