CVE-2008-6180 in NewLife Blogger
Summary
by MITRE
SQL injection vulnerability in system/nlb_user.class.php in NewLife Blogger 3.0 and earlier, and possibly 3.3.1, allows remote attackers to execute arbitrary SQL commands via the nlb3 cookie.
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Analysis
by VulDB Data Team • 11/08/2024
The vulnerability identified as CVE-2008-6180 represents a critical SQL injection flaw located within the system/nlb_user.class.php file of NewLife Blogger versions 3.0 and earlier, with potential impact extending to version 3.3.1. This vulnerability resides in the application's handling of user input through the nlb3 cookie parameter, creating an exploitable pathway for remote attackers to manipulate the underlying database system. The flaw stems from inadequate input validation and sanitization mechanisms that fail to properly escape or filter user-supplied data before incorporating it into SQL query constructs. This particular vulnerability falls under the CWE-89 category of SQL Injection, which is classified as a high-risk vulnerability due to its potential for unauthorized data access, modification, or deletion. The attack vector operates through a remote exploitation model where malicious actors can craft specially formatted nlb3 cookie values that, when processed by the vulnerable application, result in unintended SQL command execution.
The technical exploitation of this vulnerability occurs when the application processes the nlb3 cookie value without proper sanitization, allowing attackers to inject malicious SQL payloads directly into the database query execution flow. This injection can occur at multiple levels within the application's database interaction layer, potentially enabling attackers to perform unauthorized database operations such as data retrieval, modification, or even complete database compromise. The vulnerability's impact is amplified by the fact that it operates at the application layer, meaning that successful exploitation can lead to complete system compromise if proper database access controls are not in place. The flaw demonstrates poor secure coding practices and violates fundamental security principles of input validation and output encoding as outlined in the OWASP Top Ten and NIST cybersecurity guidelines.
The operational impact of this vulnerability extends beyond simple data theft, as it can enable attackers to escalate privileges within the application environment, potentially leading to full system compromise. Remote attackers can leverage this vulnerability to extract sensitive user information, modify database content, or even gain access to administrative functions within the NewLife Blogger platform. The vulnerability's persistence across multiple versions indicates a fundamental architectural flaw in the application's security design that was not adequately addressed through subsequent releases. This type of vulnerability is particularly dangerous in web applications where user input is frequently processed without proper validation, creating an attack surface that can be exploited by automated scanning tools or manual penetration testers. The exploitation process typically involves crafting malicious cookie values that bypass standard input filtering mechanisms, allowing attackers to execute arbitrary SQL commands against the backend database system.
Mitigation strategies for this vulnerability require immediate implementation of proper input validation and parameterized query execution throughout the application codebase. The recommended approach involves implementing strict input sanitization measures that filter or escape all user-supplied data before processing, particularly for cookie values and other HTTP parameters. Organizations should deploy web application firewalls that can detect and block suspicious SQL injection patterns in cookie data, while also implementing proper database access controls that limit the privileges of application database accounts. The fix should involve transitioning from dynamic SQL query construction to parameterized queries or stored procedures that separate SQL command structure from data values, thereby preventing the injection of malicious SQL code. Additionally, regular security audits and code reviews should be implemented to identify similar vulnerabilities in other parts of the application, with comprehensive testing including both automated scanning tools and manual penetration testing to ensure complete remediation of the SQL injection vulnerability. This vulnerability serves as a prime example of why secure coding practices and regular security assessments are essential components of any robust cybersecurity program, as it demonstrates how a single input validation flaw can create widespread system compromise opportunities.