CVE-2005-1354 in forum.pl
Summary
by MITRE
The forum.pl script allows remote attackers to execute arbitrary commands via shell metacharacters in the argument.
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Analysis
by VulDB Data Team • 07/24/2017
The vulnerability described in CVE-2005-1354 represents a critical command injection flaw in the forum.pl script that enables remote attackers to execute arbitrary system commands through the manipulation of shell metacharacters in script arguments. This vulnerability falls under the broader category of command injection attacks and is classified as CWE-77 according to the Common Weakness Enumeration catalog. The issue stems from inadequate input validation and sanitization within the web application's scripting environment, where user-supplied arguments are directly incorporated into shell commands without proper escaping or filtering mechanisms.
The technical implementation of this vulnerability occurs when the forum.pl script processes user input through command-line arguments and subsequently passes these arguments to shell execution functions. Attackers can exploit this weakness by crafting malicious input containing shell metacharacters such as semicolons, ampersands, or backticks that allow them to append additional commands to the original execution flow. When the script processes these inputs and executes the resulting shell command, the attacker gains the ability to execute arbitrary code on the affected system with the privileges of the web server process. This type of vulnerability is particularly dangerous because it can lead to complete system compromise and unauthorized access to sensitive data.
The operational impact of this vulnerability extends beyond simple code execution to encompass potential data breaches, system infiltration, and persistent access to compromised environments. An attacker who successfully exploits this vulnerability can perform actions such as reading sensitive files, modifying system configurations, installing backdoors, or using the compromised system as a launch point for further attacks within the network infrastructure. The vulnerability's remote nature means that attackers do not require physical access to the system and can exploit it from anywhere on the internet, making it particularly attractive for automated exploitation campaigns. This type of attack aligns with tactics documented in the MITRE ATT&CK framework under the command and control category, specifically targeting the execution of malicious code through legitimate system tools.
Mitigation strategies for CVE-2005-1354 should focus on implementing robust input validation and sanitization mechanisms that prevent shell metacharacters from being processed as part of command execution. Organizations should employ proper parameterization techniques and avoid direct shell command construction from user input whenever possible. The implementation of input filtering, output encoding, and the principle of least privilege should be enforced to minimize potential impact. Additionally, regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other scripts and applications, as this type of flaw often indicates broader security weaknesses in web application development practices. The vulnerability serves as a reminder of the critical importance of secure coding practices and input validation in preventing remote code execution attacks that can compromise entire system infrastructures.