CVE-2005-4306 in SiteNet BBS
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in SiteNet BBS 2.0 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) pg, (2) tid, (3) cid, and (4) fid parameters to netboardr.cgi, or (5) cid parameter to search.cgi.
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Analysis
by VulDB Data Team • 11/26/2024
The vulnerability identified as CVE-2005-4306 represents a critical cross-site scripting weakness affecting SiteNet BBS version 2.0 and earlier implementations. This vulnerability resides within the web application's handling of user-supplied input parameters, specifically targeting four distinct parameter names including pg, tid, cid, and fid in the netboardr.cgi script, along with the cid parameter in search.cgi. The flaw allows remote attackers to execute malicious scripts within the context of other users' browsers, potentially compromising user sessions and data confidentiality. This type of vulnerability falls under CWE-79 which specifically addresses Cross-Site Scripting flaws in software applications. The vulnerability demonstrates a classic input validation failure where user-supplied data is directly incorporated into web responses without proper sanitization or encoding mechanisms.
The technical exploitation of this vulnerability occurs through the manipulation of web application parameters that are processed by the affected CGI scripts. When users navigate to URLs containing malicious payloads in these parameters, the web application fails to properly escape or validate the input before rendering it in web pages. This creates an environment where attackers can inject arbitrary HTML and JavaScript code that executes in the victim's browser context. The attack vector is particularly dangerous because it can be delivered through various means including malicious links in emails, forums, or compromised websites, making it difficult to trace and prevent. The vulnerability affects the core functionality of the bulletin board system by allowing attackers to hijack user sessions, steal cookies, or redirect users to malicious sites. The impact is amplified by the fact that these parameters are likely used in navigation and search functions, making the attack surface quite broad.
The operational consequences of this vulnerability extend beyond simple data theft to include complete session hijacking and potential privilege escalation within the affected system. An attacker could craft malicious payloads that, when executed in a victim's browser, could steal session cookies and impersonate legitimate users. This could lead to unauthorized access to private forums, message boards, or user accounts. The vulnerability also enables the delivery of phishing content that appears legitimate to users, as the malicious code originates from the trusted SiteNet BBS domain. The attack is particularly concerning in multi-user environments where forum administrators or regular users might be targeted. According to ATT&CK framework, this vulnerability maps to T1566.001 which covers "Phishing: Spearphishing Attachment" and T1531 which addresses "Account Access Removal" through session manipulation. The system's lack of input sanitization creates a persistent threat that can affect all users who interact with the vulnerable scripts.
Mitigation strategies for this vulnerability require immediate implementation of input validation and output encoding mechanisms across all affected CGI scripts. The most effective approach involves sanitizing all user-supplied parameters before they are processed or rendered in web responses, implementing proper HTML entity encoding for any dynamic content, and employing Content Security Policy headers to limit script execution. Organizations should also consider implementing web application firewalls to detect and block malicious parameter injection attempts. Regular security audits of web applications should include thorough testing of all input parameters for XSS vulnerabilities, particularly in legacy systems like SiteNet BBS. The vulnerability highlights the importance of proper application security testing and the need for security patches in legacy systems. Additionally, user education regarding suspicious links and the importance of keeping software updated can provide additional defense layers against exploitation attempts. Regular security monitoring and log analysis should be implemented to detect potential exploitation attempts targeting these specific parameters.