CVE-2009-3486 in Junos
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in the J-Web interface in Juniper JUNOS 8.5R1.14 allow remote authenticated users to inject arbitrary web script or HTML via the host parameter to (1) the pinghost program, reachable through the diagnose program; or (2) the traceroute program, reachable through the diagnose program; or (3) the probe-limit parameter to the configuration program; the (4) wizard-ids or (5) pager-new-identifier parameter in a firewall-filters action to the configuration program; (6) the cos-physical-interface-name parameter in a cos-physical-interfaces-edit action to the configuration program; the (7) wizard-args or (8) wizard-ids parameter in an snmp action to the configuration program; the (9) username or (10) fullname parameter in a users action to the configuration program; or the (11) certname or (12) certbody parameter in a local-cert (aka https) action to the configuration program.
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Analysis
by VulDB Data Team • 10/31/2024
The vulnerability described in CVE-2009-3486 represents a critical cross-site scripting flaw within the J-Web interface of Juniper JUNOS 8.5R1.14 operating systems. This security weakness affects the web-based management interface that administrators use to configure and monitor juniper network devices, creating a significant attack surface for malicious actors who can exploit this vulnerability to execute arbitrary web scripts and HTML code on affected systems. The vulnerability stems from inadequate input validation and sanitization mechanisms within multiple components of the J-Web interface, specifically targeting parameters used in various diagnostic and configuration operations.
The technical implementation of this vulnerability involves multiple attack vectors that leverage the lack of proper parameter validation in different programs accessible through the diagnose and configuration interfaces. Attackers can exploit the host parameter in pinghost and traceroute programs, which are typically used for network diagnostics but become dangerous when user input is not properly sanitized. Additionally, the vulnerability extends to configuration parameters such as probe-limit in configuration programs, wizard-ids and pager-new-identifier in firewall-filters actions, cos-physical-interface-name in physical interfaces editing, snmp action parameters, user management parameters, and certificate management parameters. These diverse attack surfaces demonstrate the comprehensive nature of the input validation failure across the entire J-Web interface framework.
The operational impact of this vulnerability is severe as it allows remote authenticated attackers to execute malicious code within the context of the victim's browser session, potentially leading to session hijacking, data exfiltration, or further network compromise. Since the vulnerability requires only authentication to access the J-Web interface, it can be exploited by insiders or compromised accounts, making it particularly dangerous for network administrators who frequently use these web-based tools for device management. The attack could result in unauthorized access to sensitive network configurations, enabling attackers to modify firewall rules, alter routing configurations, or establish persistent backdoors within the network infrastructure. This vulnerability directly aligns with CWE-79 which defines cross-site scripting as a weakness where applications fail to properly validate or sanitize user-provided data before incorporating it into dynamically generated web content.
Mitigation strategies for this vulnerability should include immediate implementation of software updates from Juniper to address the identified XSS flaws, along with comprehensive input validation and sanitization measures for all web interface parameters. Network administrators should implement strict access controls and monitoring for the J-Web interface, ensuring that only authorized personnel have access to these management functions. The principle of least privilege should be enforced, limiting access to critical configuration parameters and diagnostic tools to essential personnel only. Additionally, implementing web application firewalls and content security policies can provide additional layers of protection against exploitation attempts. Organizations should also conduct regular security assessments of their network management interfaces and establish incident response procedures to quickly address any potential exploitation attempts, as this vulnerability represents a significant risk to network infrastructure integrity and security posture.
This vulnerability demonstrates the critical importance of proper input validation in web-based management interfaces, particularly for network infrastructure devices that are frequently targeted by sophisticated attackers. The attack vectors exposed through this vulnerability highlight the need for comprehensive security testing of all web applications within network management systems, as well as adherence to secure coding practices that prevent injection attacks. The impact extends beyond simple data theft to potentially enabling complete network compromise through manipulation of critical device configurations. Organizations should consider implementing additional security controls such as multi-factor authentication for administrative access, network segmentation of management interfaces, and regular security audits of web-based management tools to prevent similar vulnerabilities from being exploited in their environments.