CVE-2014-8618 in FortiADC
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in theme login page in Fortinet FortiADC D models before 4.2 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 05/10/2022
The CVE-2014-8618 vulnerability represents a critical cross-site scripting flaw discovered in Fortinet FortiADC D series appliances running firmware versions prior to 4.2. This vulnerability specifically targets the theme login page component of the FortiADC platform, creating a significant security risk for organizations relying on these load balancing and application delivery controllers. The FortiADC appliances are widely deployed in enterprise environments for traffic management, SSL offloading, and application acceleration, making this vulnerability particularly concerning for organizations with substantial network infrastructure dependencies. The vulnerability affects multiple D model variants, including but not limited to FortiADC-400, FortiADC-600, and FortiADC-1000 series devices, which are commonly used in data centers and cloud environments for managing application traffic and ensuring high availability services.
The technical nature of this vulnerability stems from insufficient input validation and output encoding mechanisms within the login page theme implementation. Attackers can exploit this weakness by crafting malicious payloads that are executed in the context of authenticated users' browsers when they access the compromised login page. The unspecified vectors suggest that the vulnerability may be triggered through various input parameters or HTTP headers that are processed during the theme rendering process. This XSS vulnerability operates at the client-side execution level, allowing attackers to inject arbitrary web script or HTML content that gets interpreted and executed by the victim's browser. The attack typically requires minimal privileges since the vulnerability exists in the login page context where users naturally navigate, making it particularly dangerous for credential harvesting and session hijacking attacks. The vulnerability aligns with CWE-79, which categorizes cross-site scripting as a code injection flaw that allows attackers to execute malicious scripts in the victim's browser context.
The operational impact of this vulnerability extends beyond simple script injection, creating potential pathways for more sophisticated attacks that can compromise entire application delivery infrastructures. Remote attackers could leverage this vulnerability to steal session cookies, perform unauthorized administrative actions, or redirect users to malicious websites that could further compromise the network. The login page context provides an ideal attack surface since it typically requires user interaction and often contains sensitive authentication elements that could be exploited for privilege escalation. Organizations using FortiADC appliances in production environments face significant risk of credential theft, service disruption, and potential lateral movement within their network infrastructure. The vulnerability's exploitation could lead to complete compromise of the application delivery controller, allowing attackers to manipulate traffic routing, modify SSL certificates, or even gain access to backend systems that the FortiADC appliance manages. This vulnerability directly impacts the CIA triad by potentially compromising confidentiality through credential theft, integrity through traffic manipulation, and availability through service disruption.
Mitigation strategies for CVE-2014-8618 should prioritize immediate firmware upgrades to version 4.2 or later, which contain the necessary security patches addressing the XSS vulnerability in the login page theme. Organizations should also implement network segmentation and access controls to limit exposure of FortiADC appliances to untrusted networks, reducing the attack surface for potential exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify any remaining instances of affected firmware versions within the network infrastructure. Network administrators should consider implementing web application firewalls and content security policies that can help detect and block malicious script injection attempts. The remediation process must include thorough testing of the updated firmware to ensure that security patches do not introduce compatibility issues with existing network configurations or application services. Additionally, organizations should conduct security awareness training for administrators to recognize potential exploitation attempts and maintain comprehensive monitoring of authentication logs for signs of unauthorized access attempts. The vulnerability serves as a reminder of the critical importance of keeping network security appliances updated and the potential consequences of running outdated firmware versions in enterprise environments. This vulnerability also highlights the need for robust security practices including regular vulnerability assessments, patch management procedures, and continuous monitoring of network infrastructure components to prevent exploitation of known security flaws.