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Vulnerability Alert

Microsoft Office Insecure Library Loading Vulnerability

 
Threat Type:CWE-94: Code Injection
IntelliShield ID:21720
Version:1
First Published:2010 November 09 18:41 GMT
Last Published:2010 November 09 18:41 GMT
Port: Not available
CVE:CVE-2010-3337
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:9.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:6.9
 
Version Summary:

Microsoft Office contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on the system with the privileges of a targeted user.? Updates are available.

 
 
Description

Microsoft Office contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code.

The vulnerability is due to insecure library loading when opening Microsoft Office documents.? An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious Microsoft Office document.? If successful, the attacker could execute arbitrary code on the system with the privileges of a targeted user.

Microsoft has confirmed the vulnerability in a security bulletin and released software updates.

 
Warning Indicators

Microsoft Office 2007 SP2 and prior and Office 2010 for 32-bit and 64-bit systems are affected.

 
IntelliShield Analysis

An attacker could not exploit this vulnerability without user interaction.? The attacker must convince a user to view a malicious document, likely provided as an attachment to an e-mail message, or by convincing a user to follow a link to a file that is shared on a remote file share or website.? If opened, the document could trigger the execution of arbitrary code on the system with the privileges of the user.

Microsoft has released a security advisory that explains insecure library loading vulnerabilities at the following link: 2269637. The .dll preloading behavior has been documented in IntelliShield Alert 21215.? This vulnerability is similar to, but separate from, the vulnerability documented in IntelliShield Alert 21244.

The Cisco Applied Intelligence team has created an Applied Mitigation Bulletin to address vulnerabilities that Microsoft disclosed in the November 2010 security bulletin release.? This Cisco bulletin, which assists administrators in identifying or mitigating these vulnerabilities using Cisco devices, is available at the following link: Cisco Applied Mitigation Bulletin: Microsoft Security Bulletin Release for November 2010?

 
Vendor Announcements

Microsoft has released a security bulletin at the following link: MS10-087?

 
Impact

An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code with the privileges of the targeted user.? If that user holds elevated privileges, the attacker could gain complete control over the system.

 
Technical Information

The vulnerability exists due to insecure library loading when opening Microsoft Office documents.? When a file is opened, the file may direct the application to load a malicious library, possibly referenced from a remote WebDAV file store.? When loaded, the library could trigger the execution of arbitrary code on the system with the privileges of the user.

 
Safeguards

Administrators are advised to apply the appropriate software updates.

Users are advised not to open e-mail messages from suspicious or unrecognized sources.? If users cannot verify that links or attachments included in e-mail messages are safe, they are advised not to open them.

Administrators are advised to monitor critical systems.

Microsoft has released a tool that could allow users to modify the insecure library loading behavior at the following link: 2264107?

Administrators may consider using the Microsoft Baseline Security Analyzer (MBSA) scan tool to identify common security misconfigurations and missing security updates on system endpoints.

 
Patches/Software

Microsoft customers can obtain updates directly by using the links in the security bulletin.? These updates are also distributed by Windows automatic update features and available on the Windows Update website.? Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.


Signatures
 
Cisco Intrusion Prevention System (IPS) 6.0
Signature IDSignature NameReleaseLatest Release Date
31419/0Microsoft Office Insecure Library Loading VulnerabilityS6572012 Jul 11 
 
Alert History
 

Initial Release



Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
Microsoft, Inc.Office 2007 Base, SP1, SP2 | 2010 Base

Associated Products:
N/A




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