CVE-2001-1206 in Last Lines
Summary
by MITRE
Matrix CGI vault Last Lines 2.0 allows remote attackers to execute arbitrary commands via shell metacharacters in the $error_log variable.
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Analysis
by VulDB Data Team • 05/18/2019
The vulnerability identified as CVE-2001-1206 represents a critical command injection flaw within the Matrix CGI vault Last Lines 2.0 web application. This security weakness resides in how the application processes the $error_log variable, which is susceptible to exploitation through shell metacharacters. The vulnerability falls under the broader category of command injection attacks that have been systematically catalogued by the Common Weakness Enumeration as CWE-78, which specifically addresses "Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')". The flaw demonstrates a fundamental failure in input validation and output encoding mechanisms that allow malicious actors to inject operating system commands directly into the application's processing pipeline.
The technical exploitation of this vulnerability occurs when remote attackers manipulate the $error_log variable to include shell metacharacters such as semicolons, ampersands, or backticks that are interpreted by the underlying operating system. When the application processes this variable without proper sanitization, these metacharacters are executed as part of the command line, enabling attackers to perform arbitrary operations on the host system. This type of vulnerability is particularly dangerous because it can be leveraged to execute system commands with the privileges of the web application process, potentially leading to complete system compromise. The attack vector aligns with the MITRE ATT&CK framework's technique T1059.001, which covers "Command and Scripting Interpreter: PowerShell" and similar command execution techniques that allow adversaries to run malicious commands on compromised systems.
The operational impact of this vulnerability extends beyond simple command execution, as it provides attackers with the capability to escalate privileges, access sensitive system resources, and potentially establish persistent backdoors within the compromised environment. The vulnerability affects the integrity and confidentiality of the web application and underlying system, as unauthorized users can manipulate the application's behavior to access restricted files, modify system configurations, or even exfiltrate data. Organizations running Matrix CGI vault Last Lines 2.0 are particularly at risk since the vulnerability allows for remote exploitation without requiring authentication, making it an attractive target for automated attacks. The flaw demonstrates poor input validation practices and highlights the importance of implementing proper security controls such as input sanitization, output encoding, and privilege separation in web applications. Security professionals should consider this vulnerability when assessing the attack surface of legacy web applications and implementing defense-in-depth strategies to prevent similar issues in modern software development practices.
Mitigation strategies for this vulnerability require immediate implementation of input validation measures to sanitize all user-supplied data, particularly variables that are directly incorporated into system commands. Organizations should deploy web application firewalls to detect and block suspicious command injection patterns, while also implementing proper output encoding to prevent metacharacter interpretation. The recommended approach aligns with the principle of least privilege, ensuring that web applications operate with minimal system permissions to limit potential damage from successful exploitation attempts. Additionally, regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in other legacy applications, while also ensuring that all systems are updated with the latest security patches from vendors. The vulnerability serves as a reminder of the critical importance of secure coding practices and the need for comprehensive security testing throughout the software development lifecycle to prevent such fundamental flaws from reaching production environments.