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AUSCERT External Security Bulletin Redistribution
ESB-2012.0356
Vulnerabilities in Forefront Unified Access Gateway (UAG)
Could Allow Information Disclosure
11 April 2012
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Forefront Unified Access Gateway
Publisher: Microsoft
Operating System: Windows
Impact/Access: Access Privileged Data -- Remote with User Interaction
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2012-0147 CVE-2012-0146
Original Bulletin:
http://technet.microsoft.com/en-us/security/bulletin/ms12-026
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Microsoft Security Bulletin MS12-026 - Important
Vulnerabilities in Forefront Unified Access Gateway (UAG) Could Allow
Information Disclosure (2663860)
Published Date: April 10, 2012
Version: 1.0
General Information
Executive Summary
This security update resolves two privately reported vulnerabilities in
Microsoft Forefront Unified Access Gateway (UAG). The more severe of the
vulnerabilities could allow information disclosure if an attacker sends a
specially crafted query to the UAG server.
This security update is rated Important for Microsoft Forefront Unified Access
Gateway 2010 Service Pack 1 and Microsoft Forefront Unified Access Gateway 2010
Service Pack 1 Update 1.
Affected Software
Microsoft Forefront Unified Access Gateway 2010 Service Pack 1
Microsoft Forefront Unified Access Gateway 2010 Service Pack 1 Update 1
Vulnerability Information
UAG Blind HTTP Redirect Vulnerability - CVE-2012-0146
A spoofing vulnerability exists in Forefront Unified Access Gateway (UAG) that
could lead to information disclosure. The vulnerability could allow spoofing by
redirecting web traffic intended for the UAG server to a malicious website. To
exploit the vulnerability, an attacker could send a link that has a specially
crafted URL to a user of a UAG server, and convince the user to click the link.
When an authenticated UAG user clicks the link, the authenticated user's browser
session could be redirected to a malicious site that is designed to impersonate
a legitimate UAG web interface. By doing so, the attacker could trick the user
and potentially acquire sensitive information, such as the user's credentials.
Unfiltered Access to UAG Default Website Vulnerability - CVE-2012-0147
A vulnerability exists in Microsoft Unified Access Gateway (UAG) that could
allow an unauthenticated user to access the default website of the Microsoft UAG
server from the external network.
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