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Vulnerability Alert

Microsoft Forefront Unified Access Gateway Mobile Web Portal Cross-Site Scripting Vulnerability

 
Threat Type:CWE-79: Cross-Site Scripting (XSS)
IntelliShield ID:21714
Version:1
First Published:2010 November 09 18:43 GMT
Last Published:2010 November 09 18:43 GMT
Port: Not available
CVE:CVE-2010-2734
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:4.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:3.2
Related Resources:
View related IPS Signature
 
 
Version Summary:

Microsoft Forefront Unified Access Gateway contains a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks.  Updates are available.

 
 
Description

Microsoft Forefront Unified Access Gateway 2010 Update 2 and prior contains a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks.

This vulnerability exists due to improper sanitization of parameters supplied via URL.  An unauthenticated, remote attacker could exploit the vulnerability by convincing the user to view a malicious link.  If successful, the attacker could conduct a cross-site scripting attack and capture sensitive browser-based information.

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

 
Warning Indicators

Microsoft Forefront Unified Access Gateway 2010 Update 2 and prior is vulnerable.

 
IntelliShield Analysis

To exploit the vulnerability, an attacker must convince a targeted user to open a malicious link.  Attackers may provide links to users within e-mail or instant messages and use social engineering techniques to make a user more interested in following the link.  If successful, the attacker could take actions as the user or gain access to sensitive browser-based information, including authentication credentials or recently-submitted data.

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: MS10-089 

 
Impact

An unauthenticated, remote attacker could exploit this vulnerability to conduct a cross-site scripting attack, allowing the attacker to execute arbitrary script or HTML code in the user's browser in the security context of the affected site.  An exploit could allow the attacker to take actions on the site as the targeted user or gain access to sensitive browser-based information.

 
Technical Information

This vulnerability exists due to improper sanitization of parameters supplied via URL to the Forefront Unified Access Gateway (UAG) Mobile Portal Website component before returning the parameters to the user.

An unauthenticated, remote attacker could exploit this vulnerability by convincing a targeted user to follow a link that is designed to send malicious input to the targeted application.  When followed, the link may cause the application to return the malicious input to the user's browser.  As a result, the attacker could execute arbitrary script or HTML code in the user's browser in the security context of the affected application.

 
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.

 
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
31339/0Microsoft Forefront Unified Access Gateway Privilege Elevation VulnerabilityS5292010 Nov 09 
 
Alert History
 

Initial Release



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

Primary Products:
Microsoft, Inc.Forefront Unified Access Gateway 2010 Base, Update 1, Update 2

Associated Products:
N/A




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