CVE-2014-3824 in Junos Pulse
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the web server in the Juniper Junos Pulse Secure Access Service (SSL VPN) devices with IVE OS 8.0 before 8.0r6, 7.4 before 7.4r13, and 7.1 before 7.1r20 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 02/16/2022
The CVE-2014-3824 vulnerability represents a critical cross-site scripting flaw within Juniper Junos Pulse Secure Access Service SSL VPN devices running specific versions of the IVE operating system. This vulnerability exists in the web server component of these security appliances, which serve as crucial gateways for remote access and network authentication. The affected versions include IVE OS 8.0 before 8.0r6, 7.4 before 7.4r13, and 7.1 before 7.1r20, indicating a widespread impact across multiple major release lines of the Juniper security platform. The vulnerability allows remote attackers to inject arbitrary web scripts or HTML code through unspecified vectors, potentially compromising the security of the entire network infrastructure.
The technical nature of this vulnerability stems from inadequate input validation and output encoding within the web server implementation of the Junos Pulse Secure Access Service. As a cross-site scripting vulnerability, CVE-2014-3824 falls under the CWE-79 category of Improper Neutralization of Input During Web Page Generation, which is a fundamental weakness in web application security. The unspecified vectors suggest that attackers could exploit various entry points within the web interface, potentially including login forms, configuration pages, or any other interactive elements that process user input. This broad attack surface makes the vulnerability particularly dangerous as it could be leveraged through multiple attack paths without requiring specific knowledge of the exact input handling mechanism.
The operational impact of this vulnerability extends far beyond simple web interface compromise, as it provides attackers with the ability to execute malicious scripts in the context of authenticated users' browsers. This capability enables attackers to steal session cookies, perform unauthorized actions on behalf of users, and potentially escalate privileges within the network. The vulnerability specifically targets SSL VPN devices, which serve as primary access points for remote workers and network administrators, making them prime targets for attackers seeking persistent access to enterprise networks. The implications are particularly severe given that these devices often provide privileged access to internal resources, allowing attackers to potentially move laterally within the network once initial compromise occurs.
Organizations affected by CVE-2014-3824 should immediately implement mitigation strategies including prompt patching to the latest available versions of the IVE OS, which addresses the vulnerability through proper input validation and output encoding mechanisms. Network segmentation and monitoring should be enhanced to detect suspicious traffic patterns that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1566.001 for credential access through spearphishing attachments and T1071.004 for application layer protocol usage, as attackers could leverage this vulnerability to establish persistent access and exfiltrate sensitive information. Additionally, implementing proper web application firewall rules and content security policies can help prevent exploitation attempts, while regular security assessments should verify that all Juniper devices are updated to secure versions that address this and related vulnerabilities.