MS13-091 - Vulnerabilities in Microsoft Office Could Allow Remote Code Execution

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Details
Vulnerability name/brief description MS13-091 - Vulnerabilities in Microsoft Office Could Allow Remote Code Execution
CVE/CAN name
Vendor threat level Important
SophosLabs threat level Medium
Solution MS13-091
Vendor description This security update resolves three privately reported vulnerabilities in Microsoft Office. The vulnerabilities could allow remote code execution if a specially crafted WordPerfect document file is opened in an affected version of Microsoft Office software. An attacker who successfully exploited the most severe 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 This vulnerability can be mitigated by restricting access to wpft632.cnv. User should undo this change before installing the patch.
SophosLabs testing result No SophosLabs testing result found
Currently known exploits No currently known exploits found
First sample seen No samples found
Discovery date 12 Nov 2013
Affected software Microsoft Office 2003 Service Pack 3
Microsoft Office 2007 Service Pack 3
Microsoft Office 2010 Service Packs 1 & 2 (32-bit editions)
Microsoft Office 2010 Service Packs 1 & 2 (64-bit editions)
Microsoft Office 2013 32-bit and 64-bit editions
Microsoft Office 2013 RT
References
Credits
  • MAPP
Revisions
  • November 12, 2013 - Initial Revision 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.