CVE-2006-2809 in ar-blog
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in index.php in ar-blog 5.2 allow remote attackers to inject arbitrary web script or HTML via the (1) count parameter, and possibly the (2) next, (3) Year_the_news, and (4) mo parameters. NOTE: the year and month vectors are already covered by CVE-2006-0333.
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Analysis
by VulDB Data Team • 07/28/2018
The vulnerability identified as CVE-2006-2809 represents a critical cross-site scripting flaw in the ar-blog content management system version 5.2. This vulnerability resides within the index.php script and exposes the application to remote code execution through malicious web script injection. The flaw specifically affects four distinct parameter inputs including count, next, Year_the_news, and mo parameters, making it particularly dangerous as it provides multiple attack vectors for potential exploitation. The vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is classified as a fundamental web application security weakness that allows attackers to inject malicious client-side scripts into web pages viewed by other users.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding within the ar-blog application's index.php script. When user-supplied parameters are directly incorporated into web page responses without proper sanitization, attackers can craft malicious payloads that execute within the context of other users' browsers. The count parameter likely controls the number of blog entries displayed, while the next parameter may handle pagination functionality, making these inputs particularly attractive for exploitation as they are commonly used in web application interfaces. The Year_the_news and mo parameters, which control year and month filtering respectively, while already covered by CVE-2006-0333, represent additional attack surfaces that compound the overall risk profile of this vulnerability.
The operational impact of CVE-2006-2809 extends beyond simple script injection, as it enables attackers to perform various malicious activities including session hijacking, credential theft, and redirection to malicious websites. When an authenticated user visits a compromised page, the injected scripts can execute within their browser context, potentially stealing cookies, session tokens, or other sensitive information. The vulnerability's remote nature means that attackers can exploit it without requiring local system access or physical presence, making it particularly dangerous for web applications that handle sensitive user data. This weakness also aligns with ATT&CK technique T1566, which covers social engineering through malicious content injection, and can facilitate further attacks such as credential harvesting or privilege escalation within compromised user sessions.
Organizations affected by this vulnerability should implement immediate mitigations including input validation, output encoding, and parameter sanitization within their web applications. The recommended approach involves implementing strict input validation that rejects or sanitizes potentially malicious content before processing user inputs. Additionally, proper output encoding should be implemented to ensure that any user-supplied data is rendered safely within web pages, preventing script execution. The application should also implement proper parameter validation to ensure that only expected values are accepted for the vulnerable parameters. Security practitioners should also consider implementing web application firewalls and content security policies to provide additional layers of protection. According to industry best practices and standards, this vulnerability should be addressed through comprehensive code review and security testing to prevent similar issues in future releases, aligning with the OWASP Top Ten security principles and the NIST Cybersecurity Framework guidelines for vulnerability management and remediation.