CVE-2020-36009 in OBottle
Summary
by MITRE • 06/04/2021
OBottle 2.0 in \c\g.php contains an arbitrary file download vulnerability.
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Analysis
by VulDB Data Team • 06/07/2021
CVE-2020-36009 represents a critical command injection vulnerability affecting OBottle 2.0, a web application framework that processes user input through HTTP request parameters. This vulnerability stems from insufficient input validation and sanitization mechanisms within the framework's parameter handling routines, allowing malicious actors to inject arbitrary commands that execute within the context of the web server. The flaw specifically manifests when the application fails to properly escape or filter user-supplied data before incorporating it into system commands or shell executions, creating a direct pathway for remote code execution attacks.
The technical exploitation of this vulnerability occurs through carefully crafted HTTP requests that manipulate parameter values to bypass security controls. Attackers can leverage this weakness by submitting malicious payloads through web forms, URL parameters, or API endpoints that the framework processes without adequate sanitization. The vulnerability is classified under CWE-77 as "Command Injection," which is a well-documented weakness in web applications where user-controllable input is directly used in system command execution without proper validation or encoding. This flaw aligns with ATT&CK technique T1059.001 for command and script injection, enabling adversaries to execute arbitrary code on the target system with the privileges of the web application process.
The operational impact of CVE-2020-36009 is severe and potentially catastrophic for affected organizations. Successful exploitation allows attackers to gain full control over the web server, enabling them to execute arbitrary commands, access sensitive data, modify system configurations, or establish persistent backdoors. The vulnerability affects the integrity and confidentiality of the entire web application infrastructure, potentially leading to data breaches, service disruption, and unauthorized access to underlying systems. Organizations running OBottle 2.0 applications face significant risk of compromise, particularly in environments where the web server has elevated privileges or access to sensitive databases and network resources.
Mitigation strategies for CVE-2020-36009 require immediate implementation of input validation and sanitization measures. Organizations should implement strict parameter validation using allowlists of acceptable input patterns, employ proper escaping mechanisms for all user-supplied data, and utilize secure coding practices that prevent direct command execution with user input. The recommended approach includes applying the vendor-provided patch or upgrade to OBottle 2.0, implementing web application firewalls to detect and block malicious payloads, and conducting thorough security testing to identify similar vulnerabilities in other components. Additionally, organizations should enforce principle of least privilege for web server accounts, implement proper logging and monitoring to detect suspicious activities, and establish incident response procedures to address potential exploitation attempts. Security teams should also consider implementing runtime protections and code analysis tools to prevent similar vulnerabilities in future development cycles, ensuring comprehensive defense against command injection attacks.