CVE-2009-4882 in ZoneCheck
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in zc/publisher/html.rb in ZoneCheck 2.0.4-13 and 2.1.0 allows remote attackers to inject arbitrary web script or HTML via the ns parameter to zc.cgi.
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Analysis
by VulDB Data Team • 09/14/2021
The vulnerability described in CVE-2009-4882 represents a classic cross-site scripting flaw within the ZoneCheck web application framework version 2.0.4-13 and 2.1.0. This security weakness resides in the zc/publisher/html.rb component and specifically affects the zc.cgi script's handling of the ns parameter. The vulnerability classification aligns with CWE-79, which defines cross-site scripting as a code injection attack where malicious scripts are injected into otherwise benign and trusted websites. The flaw enables remote attackers to execute arbitrary web scripts or HTML code within the context of victim users' browsers, creating a significant security risk for anyone interacting with the affected ZoneCheck implementation.
The technical mechanism behind this vulnerability involves improper input validation and output encoding within the ZoneCheck application's HTML generation module. When the ns parameter is passed to zc.cgi, the application fails to adequately sanitize or escape the input before incorporating it into dynamically generated HTML content. This omission creates an opening for attackers to craft malicious payloads that, when executed in a victim's browser, can perform actions such as stealing session cookies, redirecting users to malicious sites, or defacing the application interface. The vulnerability demonstrates a fundamental weakness in the application's data flow processing where user-supplied data transitions from input through processing to output without proper security controls.
The operational impact of this vulnerability extends beyond simple script injection, as it fundamentally compromises the integrity and trustworthiness of the ZoneCheck service. Attackers exploiting this flaw can manipulate the application's output to perform unauthorized actions on behalf of legitimate users, potentially leading to session hijacking, data theft, or further exploitation within the network environment. The vulnerability affects all users who interact with the ZoneCheck application, particularly those who might be authenticated or those who simply browse to pages that display information processed through the vulnerable code path. From an attacker perspective, this represents a low-effort, high-impact vector that requires minimal technical expertise to exploit, making it particularly dangerous in environments where the application serves as a gateway to more sensitive systems.
Mitigation strategies for CVE-2009-4882 should focus on implementing proper input validation and output encoding mechanisms throughout the ZoneCheck application. The most effective immediate fix involves sanitizing all user-supplied input parameters, particularly the ns parameter, before incorporating them into HTML output. This approach aligns with the principle of defense in depth and follows established security practices outlined in the OWASP Top Ten security guidelines. Organizations should also implement Content Security Policy headers to limit script execution capabilities and consider upgrading to patched versions of ZoneCheck where available. The vulnerability highlights the importance of proper parameter handling and input sanitization, which are fundamental requirements in the secure development lifecycle and directly correlate with ATT&CK technique T1059.001 for command and script injection. Regular security assessments and input validation testing should be implemented to prevent similar vulnerabilities from emerging in other application components.