CVE-2006-4857 in ClickBlog
Summary
by MITRE
SQL injection vulnerability in default.asp (aka the login page) in ClickTech ClickBlog 2.0 allows remote attackers to execute arbitrary SQL commands via the (1) username and (2) form_codeword (aka the Password field) parameters.
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Analysis
by VulDB Data Team • 08/06/2024
The CVE-2006-4857 vulnerability represents a critical sql injection flaw in ClickTech ClickBlog 2.0's default.asp login page, which serves as the primary entry point for user authentication. This vulnerability exposes the application to remote code execution attacks by allowing malicious actors to manipulate the authentication process through carefully crafted input parameters. The flaw specifically affects the username and form_codeword parameters, which are processed without proper input validation or sanitization mechanisms.
The technical implementation of this vulnerability stems from improper parameter handling within the default.asp script where user inputs are directly concatenated into sql query strings without appropriate escaping or parameterization. When attackers submit malicious input through the username field or the Password field identified as form_codeword, the application fails to sanitize these inputs before incorporating them into database queries. This creates an environment where sql commands can be injected and executed with the privileges of the database user account under which the application operates, potentially leading to complete database compromise.
The operational impact of this vulnerability extends beyond simple authentication bypass, as successful exploitation could enable attackers to extract sensitive information from the database, modify or delete user accounts, and potentially escalate privileges to gain administrative control over the entire blog system. The vulnerability affects the core authentication mechanism, making it particularly dangerous as it undermines the fundamental security posture of the application. Attackers could leverage this weakness to access user credentials, personal information, and potentially use the compromised system as a foothold for further attacks within the network infrastructure.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and parameterized queries throughout the application codebase. The most effective immediate fix involves replacing direct string concatenation of user inputs with prepared statements or parameterized queries that separate sql code from data. Additionally, implementing proper input sanitization, output encoding, and least privilege database access controls would significantly reduce the attack surface. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for exploitation attempts. This vulnerability aligns with CWE-89 sql injection and maps to attack techniques in the ATT&CK framework under T1190 for exploitation of remote services and T1078 for valid accounts usage, highlighting the need for comprehensive defensive measures.