CVE-2010-3076 in smbind
Summary
by MITRE
The filter function in php/src/include.php in Simple Management for BIND (aka smbind) before 0.4.8 does not anchor a certain regular expression, which allows remote attackers to conduct SQL injection attacks and execute arbitrary SQL commands via the username parameter to the admin login page.
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Analysis
by VulDB Data Team • 09/27/2021
The vulnerability identified as CVE-2010-3076 resides within the Simple Management for BIND (smbind) web application, specifically in the php/src/include.php file. This flaw affects versions prior to 0.4.8 and represents a critical security weakness that enables remote attackers to manipulate the application's authentication mechanism. The vulnerability manifests through improper input validation in the filter function, which processes user credentials during the admin login process, creating an avenue for malicious exploitation.
The technical root cause of this vulnerability stems from a missing regular expression anchor in the filter function implementation. When the username parameter is submitted through the admin login page, the application processes this input through a regular expression that fails to properly constrain the pattern matching. This lack of anchoring allows attackers to craft malicious input that can bypass the intended validation logic and inject arbitrary SQL commands into the database query execution context. The vulnerability specifically targets the username parameter, making it particularly dangerous for authentication bypass scenarios.
The operational impact of this vulnerability is severe and multifaceted. Remote attackers can leverage this weakness to execute arbitrary SQL commands against the backend database, potentially leading to complete database compromise, data exfiltration, and unauthorized access to sensitive information. The vulnerability enables attackers to perform SQL injection attacks that could result in privilege escalation, data manipulation, or complete system compromise. Given that this affects the admin login functionality, successful exploitation could grant attackers administrative privileges over the entire smbind management interface.
This vulnerability maps directly to CWE-89, which describes SQL injection weaknesses in software applications, and aligns with ATT&CK technique T1190, which covers exploitation of remote services through SQL injection attacks. The lack of proper input validation and the absence of proper SQL query parameterization in the filter function creates a classic SQL injection vector that can be exploited by attackers without requiring any special privileges or access to the system. The vulnerability demonstrates poor secure coding practices and inadequate protection against malicious input manipulation.
Mitigation strategies for CVE-2010-3076 should prioritize immediate patching of the smbind application to version 0.4.8 or later, which contains the necessary fixes for the regular expression anchoring issue. Additionally, implementing proper input validation and sanitization measures can provide defense-in-depth protection, including the use of prepared statements or parameterized queries to prevent SQL injection, input length restrictions, and proper escaping of special characters. Network-level protections such as web application firewalls and intrusion detection systems can also help detect and block exploitation attempts targeting this specific vulnerability pattern.