CVE-2008-0359 in Blog Cms
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in BLOG:CMS 4.2.1b allow remote attackers to inject arbitrary web script or HTML via the PATH_INFO to (1) admin.php or (2) index.php in photo/.
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Analysis
by VulDB Data Team • 10/14/2024
The vulnerability identified as CVE-2008-0359 represents a critical cross-site scripting flaw discovered in BLOG:CMS version 4.2.1b, specifically affecting the administrative and photo gallery components of the content management system. This vulnerability stems from insufficient input validation and sanitization mechanisms within the application's handling of HTTP PATH_INFO parameters, creating exploitable entry points that enable remote attackers to inject malicious scripts into web pages viewed by other users.
The technical implementation of this vulnerability occurs when the application fails to properly sanitize user-supplied data passed through the PATH_INFO component of HTTP requests. Attackers can exploit this weakness by crafting malicious URLs that contain script payloads, which are then executed in the context of other users' browsers when they access the affected pages. The vulnerability affects two primary entry points: admin.php and index.php within the photo/ directory structure, suggesting that the application's input validation is inconsistent across different components. This particular flaw falls under CWE-79 which specifically addresses cross-site scripting vulnerabilities, where the application does not properly neutralize user input before it is rendered to other users.
The operational impact of this vulnerability is severe as it allows attackers to execute arbitrary web scripts or HTML content in the context of authenticated administrator sessions or regular user sessions. An attacker could potentially steal session cookies, modify content, redirect users to malicious sites, or perform actions on behalf of legitimate users. The implications extend beyond simple script injection since the vulnerability affects administrative functionality, meaning that successful exploitation could lead to complete system compromise. The attack vector is particularly concerning as it requires no authentication to exploit and can be delivered through standard web browser requests, making it accessible to anyone who can access the vulnerable application.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application. The most effective remediation involves sanitizing all user-supplied input, particularly data passed through PATH_INFO parameters, before processing or rendering it in web pages. Organizations should implement proper encoding of output data to prevent script execution in browser contexts. Additionally, the application should employ a whitelist-based approach for validating input parameters and implement proper HTTP request handling that properly sanitizes PATH_INFO components. Security best practices dictate that this vulnerability should be addressed through immediate patching of the CMS application, as well as implementing web application firewalls to detect and block malicious requests. The ATT&CK framework categorizes this vulnerability under T1566.001 - Phishing, as attackers can use such XSS vulnerabilities to deliver malicious payloads through crafted web requests. Organizations should also consider implementing Content Security Policy headers to provide additional defense-in-depth against script injection attacks. The vulnerability demonstrates the critical importance of proper input validation and output encoding as fundamental security controls that must be implemented consistently across all web application components to prevent such widespread exploitation scenarios.