CVE-2006-0101 in sBLOG
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in sBLOG 0.7.1 Beta 20051202 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) p and (2) keyword parameters in (a) index.php and (b) search.php.
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Analysis
by VulDB Data Team • 08/27/2017
The vulnerability identified as CVE-2006-0101 represents a critical cross-site scripting flaw affecting sBLOG version 0.7.1 Beta 20051202 and earlier implementations. This vulnerability resides within the web application's input validation mechanisms, specifically targeting two distinct parameter fields that process user-supplied data without adequate sanitization. The affected parameters include the 'p' parameter in index.php and the 'keyword' parameter in search.php, both of which form part of the application's core functionality for content display and search operations respectively.
The technical nature of this vulnerability aligns with CWE-79, which classifies cross-site scripting as a code injection flaw where malicious scripts are injected into otherwise benign web applications. The flaw occurs when user input containing HTML or JavaScript code is directly incorporated into web page responses without proper encoding or validation. Attackers can exploit this weakness by crafting malicious payloads that, when processed by the vulnerable application, execute unintended code within the context of other users' browsers. The vulnerability affects the application's core search and content display mechanisms, making it particularly dangerous as it can be triggered through common user interactions.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as it provides attackers with persistent access to user sessions and potentially sensitive information. When exploited, these XSS vulnerabilities can enable session hijacking, credential theft, and redirection to malicious sites. The attack surface is broad since the vulnerable parameters are accessible through standard web application interfaces, making exploitation relatively straightforward for attackers with basic web security knowledge. Users who browse pages containing malicious payloads could unknowingly execute code that compromises their browser sessions, potentially leading to unauthorized access to personal data, account takeovers, or further network exploitation.
Security mitigations for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms. The most effective approach involves sanitizing all user-supplied input through proper escaping techniques before processing or displaying content, particularly for parameters that are directly rendered in web responses. Implementing Content Security Policy headers can provide additional protection against script execution, while regular security audits and code reviews should be conducted to identify similar vulnerabilities in other application components. Organizations should also consider implementing web application firewalls to detect and block malicious payloads targeting known XSS patterns, though these should complement rather than replace proper input validation. The vulnerability demonstrates the critical importance of adhering to secure coding practices as outlined in the OWASP Top Ten and ATT&CK framework's T1203 technique for exploitation of web application vulnerabilities.