MS12-056 - Vulnerability in JScript and VBScript Engines Could Allow Remote Code Execution (2706045)

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Details
Vulnerability name/brief description MS12-056 - Vulnerability in JScript and VBScript Engines Could Allow Remote Code Execution (2706045)
CVE/CAN name
Vendor threat level Important
SophosLabs threat level High
Solution MS12-056
Vendor description This security update resolves a privately reported vulnerability in the JScript and VBScript scripting engines on 64-bit versions of Microsoft Windows. The vulnerability could allow remote code execution if a user visited a specially crafted website. An attacker would have no way to force users to visit the website. Instead, an attacker would have to convince users to visit the website, typically by getting them to click a link in an e-mail message or Instant Messenger message that takes users to the attacker's website.
SophosLabs comments Although javascript and vbscript are affected, and the vulnerability can be triggered by getting the user to visit a malicious webpage, the fact that this vulnerability exists only on 64bit platforms reduces its current impact.
SophosLabs testing result No SophosLabs testing result found
Currently known exploits No currently known exploits found
First sample seen No samples found
Discovery date 14 Aug 2012
Affected software Windows XP Professional x64 Edition Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Vista x64 Edition Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2
Windows 7 for x64-based Systems
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for Itanium-based Systems
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
References
Credits
  • MAPP
Revisions
  • August 14th, 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.