Vulnerability in OLE Could Allow Remote Code Execution (MS13-070)

ITS Advisory Number: 
2013-081
Date(s) Issued: 
Tuesday, September 10, 2013
Subject: 
Vulnerability in OLE Could Allow Remote Code Execution (MS13-070)
Overview: 

A vulnerability has been discovered in Microsoft Windows Object Linking and Embedding (OLE) Automation which could allow for remote code execution.  This vulnerability is caused when Windows incorrectly handles OLE objects in memory.  The vulnerability could be exploited if a user opens a specially crafted file. Successful exploitation of this vulnerability could allow the attacker to could gain the same user rights as the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

Systems Affected: 
  • Microsoft Windows XP
  • Microsoft Windows Server 2003
RISK
GOVERNMENT
Large and medium government entities: 
High
Small government entities: 
High
BUSINESS
Large and medium business entities: 
High
Small business entities: 
High
Home Users: 
High
Description: 

A vulnerability exists in OLE that could lead to remote code execution if a user opens a file that contains a specially crafted OLE object. An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user. If a user is logged on with administrative user rights, an attacker could take complete control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. 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.
This vulnerability is caused when Windows incorrectly handles OLE objects in memory.

Actions: 
  • Apply appropriate patches provided by Microsoft to vulnerable systems immediately after appropriate testing.
  • Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.
  • Remind users not to open email attachments from unknown or untrusted sources.
  • Remind users not to open email attachments from unknown users or suspicious emails from trusted sources.
References: 
Microsoft:
http://technet.microsoft.com/en-us/security/bulletin/ms13-070
CVE:
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3863