CVE-2007-0186 in Firepass 4100
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in F5 FirePass SSL VPN allow remote attackers to inject arbitrary web script or HTML via (1) the xcho parameter to my.logon.php3; the (2) topblue, (3) midblue, (4) wtopblue, and certain other Custom color parameters in a per action to vdesk/admincon/index.php; the (5) h321, (6) h311, (7) h312, and certain other Front Door custom text color parameters in a per action to vdesk/admincon/index.php; the (8) ua parameter in a bro action to vdesk/admincon/index.php; the (9) app_param and (10) app_name parameters to webyfiers.php; (11) double eval functions; (12) JavaScript contained in an <FP_DO_NOT_TOUCH> element; and (13) the vhost parameter to my.activation.php. NOTE: it is possible that this candidate overlaps CVE-2006-3550.
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Analysis
by VulDB Data Team • 10/02/2017
The CVE-2007-0186 vulnerability represents a critical cross-site scripting flaw affecting F5 FirePass SSL VPN appliances, exposing organizations to significant web application security risks. This vulnerability stems from insufficient input validation and output encoding mechanisms within the SSL VPN management interface, allowing remote attackers to inject malicious scripts that execute in the context of authenticated users' browsers. The flaw manifests across multiple endpoints within the FirePass administration console, creating numerous attack vectors that collectively weaken the overall security posture of the SSL VPN infrastructure.
The technical implementation of this vulnerability spans several distinct parameters and interface elements within the FirePass management console, each presenting unique exploitation opportunities. The xcho parameter in my.logon.php3 accepts unfiltered user input that gets directly embedded into the page output without proper sanitization. Similarly, the color customization parameters including topblue, midblue, wtopblue, and various Front Door text color parameters in vdesk/admincon/index.php fail to validate or encode user-supplied values before rendering them in HTML output. Additional attack vectors include the ua parameter in bro action to vdesk/admincon/index.php, which processes user agent strings without proper sanitization, and the app_param and app_name parameters in webyfiers.php that handle application-specific data without adequate input filtering.
The operational impact of this vulnerability extends beyond simple script injection, as it enables attackers to potentially escalate privileges and access sensitive administrative functions within the SSL VPN environment. When combined with the double eval functions and JavaScript contained within FP_DO_NOT_TOUCH elements, the vulnerability creates opportunities for more sophisticated attacks including session hijacking, credential theft, and unauthorized access to protected network resources. The presence of the vhost parameter in my.activation.php further compounds the risk by allowing attackers to manipulate host headers in ways that could bypass security controls or redirect users to malicious sites.
This vulnerability aligns with CWE-79 which specifically addresses Cross-Site Scripting flaws in web applications, and demonstrates characteristics consistent with ATT&CK technique T1566 related to spearphishing with malicious attachments. The attack surface is particularly concerning as it affects the core administrative interface of the SSL VPN appliance, potentially allowing attackers to gain unauthorized access to sensitive network resources. The overlapping nature with CVE-2006-3550 suggests this represents a broader class of input validation issues within the FirePass platform that require comprehensive remediation across all affected components.
Organizations should implement immediate mitigations including input validation and output encoding mechanisms across all vulnerable parameters, regular security assessments of SSL VPN configurations, and network segmentation to limit the potential impact of successful exploitation. The vulnerability underscores the importance of maintaining up-to-date security patches and conducting thorough security reviews of web application interfaces to prevent similar issues in other network infrastructure components.