CVE-2007-6729 in P-330W router
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the web management interface in the ZyXEL P-330W router allows remote attackers to inject arbitrary web script or HTML via the pingstr parameter and other unspecified vectors.
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Analysis
by VulDB Data Team • 12/20/2017
The CVE-2007-6729 vulnerability represents a critical cross-site scripting flaw discovered in the web management interface of ZyXEL P-330W routers. This vulnerability stems from inadequate input validation and sanitization within the router's web interface, specifically affecting the pingstr parameter and other unspecified vectors. The flaw allows remote attackers to execute malicious scripts in the context of other users who access the affected management interface, creating a significant security risk for network administrators and end users who rely on the device for network connectivity.
The technical exploitation of this vulnerability occurs through the manipulation of the pingstr parameter in the web management interface, which fails to properly sanitize user-supplied input before processing or displaying it within the web page context. This lack of input validation creates an environment where attackers can inject malicious HTML or JavaScript code that gets executed when other users navigate to affected pages or interact with the router's web interface. The vulnerability falls under CWE-79 which specifically addresses Cross-Site Scripting flaws in web applications, where improper validation of user-provided data leads to code execution in the victim's browser context. The attack vector is particularly concerning because it does not require authentication to the router's management interface, making it accessible to any remote attacker who can reach the device's web interface.
The operational impact of CVE-2007-6729 extends beyond simple script injection, as it provides attackers with the capability to perform session hijacking, steal administrative credentials, redirect users to malicious websites, or even execute arbitrary commands on the affected device. Network administrators who access the router's management interface from compromised workstations could have their sessions hijacked, potentially allowing full control over the network infrastructure. The vulnerability also enables attackers to establish persistent backdoors through malicious scripts that remain active during subsequent user sessions, creating a long-term threat to network security. This type of vulnerability directly aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter: JavaScript, and T1566 for Phishing, as attackers can leverage the XSS flaw to deliver malicious payloads to unsuspecting users.
Mitigation strategies for CVE-2007-6729 should include immediate implementation of network segmentation to isolate the affected router from critical network segments, followed by mandatory firmware updates from ZyXEL to address the input validation deficiencies. Network administrators should also implement web application firewalls to filter malicious payloads targeting the pingstr parameter and other vulnerable vectors. Regular security audits of network device management interfaces are essential to identify similar vulnerabilities across the entire network infrastructure. The implementation of secure coding practices, including proper input validation, output encoding, and the use of Content Security Policies, should be enforced in all network device web interfaces. Additionally, user education regarding the risks of accessing network management interfaces from untrusted networks and the importance of maintaining updated firmware versions helps reduce the attack surface for such vulnerabilities. Organizations should also consider implementing network monitoring solutions that can detect anomalous traffic patterns associated with XSS exploitation attempts, providing early warning capabilities for potential attacks targeting these types of flaws.