CVE-2018-19423 in Codiad
Summary
by MITRE
Codiad 2.8.4 allows remote authenticated administrators to execute arbitrary code by uploading an executable file.
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Analysis
by VulDB Data Team • 02/17/2025
The vulnerability CVE-2018-19423 represents a critical remote code execution flaw in Codiad version 2.8.4, a web-based integrated development environment designed for collaborative coding. This vulnerability specifically targets authenticated administrative users, meaning that an attacker must first obtain valid administrative credentials to exploit the flaw. The issue stems from inadequate input validation and file upload restrictions within the application's file management functionality. When an authenticated administrator uploads a file through the web interface, the application fails to properly validate the file type or content, allowing malicious users to upload executable files or scripts that can be executed within the web server context. This represents a classic path traversal and privilege escalation vulnerability that directly violates security principles of least privilege and input sanitization. The vulnerability is particularly dangerous because it leverages the elevated privileges of administrative accounts, which typically have extensive system access rights and can manipulate the entire application environment.
The technical implementation of this vulnerability occurs through the application's file upload mechanism where the system does not perform adequate checks on uploaded files. Attackers can bypass standard file extension filtering by using techniques such as file name manipulation, content type spoofing, or by uploading files with malicious extensions that are not properly filtered. The flaw is categorized under CWE-434 which specifically addresses "Unrestricted Upload of File with Dangerous Type" and aligns with ATT&CK technique T1190 for "Exploit Public-Facing Application" and T1059 for "Command and Scripting Interpreter." When an executable file is uploaded, the web server processes it as a legitimate application component, potentially executing shell commands or code within the context of the web application. The vulnerability demonstrates a failure in the principle of defense in depth, where multiple layers of security controls should prevent such arbitrary file execution. The flaw exists because the application relies on client-side validation and does not implement proper server-side file type verification, content analysis, or secure file storage mechanisms that would prevent malicious files from being executed.
The operational impact of CVE-2018-19423 is severe and multifaceted, potentially allowing full system compromise when exploited by malicious actors. An attacker with administrative access could upload malware, backdoors, or web shells that persistently reside on the server and provide ongoing access to the compromised system. The vulnerability enables attackers to execute arbitrary commands with the privileges of the web server process, which could lead to data exfiltration, system enumeration, privilege escalation to other system accounts, or even lateral movement within the network. Depending on the server configuration, this could result in complete system takeover, allowing attackers to install additional malicious software, modify or delete critical application files, or establish persistent access points. The vulnerability also impacts business continuity by potentially causing application downtime, data loss, or regulatory compliance violations, especially in environments where Codiad is used for sensitive development work or production code management. Organizations using this version of Codiad face significant risk exposure, particularly in environments where administrative credentials are compromised through phishing, credential stuffing, or other attack vectors.
Mitigation strategies for CVE-2018-19423 must address both immediate remediation and long-term security improvements to prevent similar vulnerabilities. The most critical immediate action is to upgrade to a patched version of Codiad that properly validates file uploads and implements secure file handling practices. Organizations should also implement restrictive file upload policies that limit file types to only those necessary for the application's functionality, employ content-based file type verification, and use secure file storage mechanisms that prevent execution of uploaded files. Network-level protections such as web application firewalls should be configured to monitor and block suspicious file upload patterns, while security monitoring systems should be enhanced to detect unauthorized file uploads or execution attempts. Administrative accounts should be protected through multi-factor authentication, regular credential rotation, and strict access controls with the principle of least privilege. The vulnerability highlights the importance of implementing proper input validation and secure coding practices, particularly in web applications that handle user-supplied data. Organizations should also conduct regular security assessments and penetration testing to identify similar vulnerabilities in their web applications, ensuring that file upload functionality is properly secured against malicious file uploads. Additionally, implementing proper logging and monitoring of file upload activities can help detect and respond to potential exploitation attempts.