MS12-071 - Cumulative Security Update for Internet Explorer (2761451)

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Details
Vulnerability name/brief description MS12-071 - Cumulative Security Update for Internet Explorer (2761451)
CVE/CAN name
Vendor threat level Critical
SophosLabs threat level Medium
Solution MS12-071
Vendor description This security update resolves three privately reported vulnerabilities in Internet Explorer. The vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited these vulnerabilities could gain the same user rights as the current user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
SophosLabs comments When IE attempts to access an object that has been deleted, the IE process may corrupt memory enabling an attacker to execute arbitrary code in current user space.
SophosLabs testing result No SophosLabs testing result found
Currently known exploits No currently known exploits found
First sample seen No samples found
Discovery date 13 Nov 2012
Affected software Internet Explorer 9 on:
Windows Vista Service Pack 2 Internet Explorer 9 
Windows Vista x64 Edition Service Pack 2 Internet Explorer 9 
Windows Server 2008 for 32-bit Systems Service Pack 2 Internet Explorer 9 
Windows Server 2008 for x64-based Systems Service Pack 2 Internet Explorer 9 
Windows 7 for 32-bit Systems Internet Explorer 9 
Windows 7 for 32-bit Systems Service Pack 1 Internet Explorer 9 
Windows 7 for x64-based Systems Internet Explorer 9 
Windows 7 for x64-based Systems Service Pack 1 Internet Explorer 9 
Windows Server 2008 R2 for x64-based Systems Internet Explorer 9 
Windows Server 2008 R2 for x64-based Systems Service Pack 1 Internet Explorer 9 
References
Credits
  • MAPP
Revisions
  • Nov 13, 2012 - Initial analysis written

Explanation of terms

Vulnerability Name/Brief Description:

Vendor identifier plus a brief description of the type of attack.

CVE/CAN Name:

Currently assigned CVE name. If a CVE name doesn't exist the CAN name will be used until a CVE has been assigned.

Vendor Threat Level:

Threat level assigned by the vendor

SophosLabs Threat Level:

Threat level assigned by SophosLabs

  • LOW RISK - There is little chance of this vulnerability being actively exploited by malware.
  • MEDIUM RISK - There is a possibility of this vulnerability being actively exploited by malware.
  • HIGH RISK - There is a strong possibility of this vulnerability being actively exploited by malware.
  • CRITICAL RISK - This vulnerability will almost certainly be actively exploited by malware.

Solution:

Vendor-supplied Patch identifier and recommended solution, or workaround if applicable.

Vendor Description:

Summary of the cause and potential effect of the vulnerability provided by the vendor.

SophosLabs Comments:

SophosLabs' opinions and observations of the vulnerability in question.

SophosLabs Testing Result:

Details of completed lab testing, if applicable. Please note that the lab test environment may differ significantly from user environments.

Currently Known Exploits:

List of identities for known exploits, if applicable.

First Sample Seen:

Date of the first sample seen by SophosLabs.

Discovery Date:

Date of the earliest known publically disclosed advisory.

Affected Software:

Vulnerable platforms and software versions.