CVE-2006-4220 in GroupWise
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in webacc in Novell GroupWise WebAccess before 7 Support Pack 3 Public Beta allow remote attackers to inject arbitrary web script or HTML via the (1) User.html, (2) Error, (3) User.Theme.index, and (4) and User.lang parameters.
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Analysis
by VulDB Data Team • 05/26/2025
The vulnerability identified as CVE-2006-4220 represents a critical cross-site scripting weakness in Novell GroupWise WebAccess software, specifically affecting versions prior to 7 Support Pack 3 Public Beta. This flaw resides within the webacc component of the GroupWise WebAccess platform, which serves as a web-based interface for email and collaboration services. The vulnerability stems from insufficient input validation and output encoding mechanisms that fail to properly sanitize user-supplied data before incorporating it into dynamic web responses. The affected parameters include User.html, Error, User.Theme.index, and User.lang, which collectively represent common input vectors that web applications typically use to process user requests and render dynamic content. This weakness creates a pathway for malicious actors to inject arbitrary web scripts or HTML code that executes within the context of other users' browsers.
The technical exploitation of this vulnerability follows a classic XSS attack pattern where an attacker crafts malicious input containing script tags or other HTML elements that get processed and rendered by the vulnerable web application. When legitimate users browse pages that contain these malicious inputs, their browsers execute the injected code, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The attack vector is particularly concerning because it affects core application parameters that are frequently used during normal user interactions, making exploitation relatively straightforward and potentially widespread. The vulnerability aligns with CWE-79, which defines cross-site scripting as the failure to properly escape output, and specifically manifests as a reflected XSS vulnerability since the malicious input is immediately reflected back in the application's response without proper sanitization.
The operational impact of CVE-2006-4220 extends beyond simple data theft, as it provides attackers with persistent access to user sessions and potentially sensitive corporate communications. Organizations utilizing Novell GroupWise WebAccess would face significant risks including unauthorized access to email accounts, compromise of business correspondence, and potential lateral movement within network environments. The vulnerability's presence in the web access interface means that attackers could target not just individual users but entire organizations simultaneously, especially if the application serves multiple departments or business units. This makes the vulnerability particularly dangerous in enterprise environments where GroupWise WebAccess might be used for critical business communications and collaboration. The attack surface is further expanded by the fact that these parameters are likely accessed through standard web navigation patterns, making exploitation less dependent on specialized techniques and more reliant on basic web application attack methods.
Security mitigation for this vulnerability requires immediate implementation of the vendor-provided patch and support pack updates, specifically targeting the 7 Support Pack 3 Public Beta release which addresses these XSS weaknesses. Organizations should implement comprehensive input validation measures that enforce strict sanitization of all user-supplied parameters, particularly those used for dynamic content generation. The remediation strategy should include output encoding mechanisms that prevent script execution in web responses, ensuring that any potentially malicious content is rendered harmless. Additionally, organizations should deploy web application firewalls and content security policies to add defensive layers against similar vulnerabilities. This vulnerability demonstrates the importance of maintaining up-to-date security patches and implementing proper input validation as fundamental defensive measures against web-based attacks, aligning with ATT&CK technique T1566 for initial access through web application attacks and T1071 for application layer protocols. Organizations should also consider implementing security awareness training for administrators to ensure timely patch deployment and maintain proper security hygiene practices.