CVE-2010-2733 in Forefront Unified Access Gateway
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the Web Monitor in Microsoft Forefront Unified Access Gateway (UAG) 2010 Gold, 2010 Update 1, and 2010 Update 2 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors, aka "UAG XSS Allows EOP Vulnerability."
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Analysis
by VulDB Data Team • 09/28/2021
The vulnerability described in CVE-2010-2733 represents a critical cross-site scripting flaw within the Web Monitor component of Microsoft Forefront Unified Access Gateway 2010 across multiple update versions. This issue specifically affects the unified access gateway's web-based management interface, which serves as the primary administrative portal for configuring and monitoring the security appliance. The vulnerability exists in the way the Web Monitor processes user input and renders content within the browser environment, creating an avenue for malicious actors to execute arbitrary script code in the context of authenticated users' browsers.
The technical exploitation of this XSS vulnerability occurs through unspecified input vectors within the Web Monitor interface, allowing remote attackers to inject malicious scripts or HTML content that gets executed when legitimate users access the affected web pages. This type of vulnerability falls under the Common Weakness Enumeration category CWE-79, which specifically addresses cross-site scripting flaws in web applications. The attack vector leverages the trust relationship between the user's browser and the UAG web interface, enabling attackers to potentially escalate privileges and gain elevated access to the system. The vulnerability's designation as "UAG XSS Allows EOP Vulnerability" indicates its potential for privilege escalation, where attackers could leverage the XSS flaw to execute commands with higher privileges than initially granted.
The operational impact of this vulnerability extends beyond simple script injection, as it creates a significant security risk for organizations relying on Microsoft Forefront UAG for their unified access and security management. When exploited, the XSS vulnerability allows attackers to steal session cookies, redirect users to malicious sites, modify web page content, and potentially gain administrative access to the UAG appliance itself. The threat landscape for this vulnerability aligns with ATT&CK technique T1059.007, which covers scripting through web shells, and T1566.002, which addresses spearphishing with links, as attackers could craft malicious web pages that exploit this flaw to compromise user sessions. Organizations using this version of UAG face potential data breaches, unauthorized access to network resources, and complete compromise of the unified access gateway's security functions.
Mitigation strategies for CVE-2010-2733 should include immediate application of Microsoft security patches and updates, as well as network segmentation to limit access to the UAG Web Monitor interface. Organizations should implement proper input validation and output encoding mechanisms to prevent script injection, while also considering the deployment of web application firewalls to detect and block malicious payloads. The vulnerability's presence in multiple update versions underscores the importance of maintaining current security patches and conducting regular vulnerability assessments of critical infrastructure components. Security teams should also monitor for indicators of compromise related to this vulnerability, particularly unusual traffic patterns or unauthorized access attempts to the UAG management interface, as recommended by the MITRE ATT&CK framework's approach to threat hunting and incident response.