CVE-2020-7688 in mversion
Summary
by MITRE
The issue occurs because tagName user input is formatted inside the exec function is executed without any checks.
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Analysis
by VulDB Data Team • 10/28/2020
The vulnerability identified as CVE-2020-7688 represents a critical security flaw in software systems that process user input through exec functions without proper validation or sanitization. This weakness allows attackers to inject malicious commands that can be executed with the privileges of the affected application, potentially leading to complete system compromise. The vulnerability specifically manifests when user-supplied data intended for tag name processing is directly incorporated into execution contexts without adequate security controls.
The technical implementation of this flaw involves the improper handling of user input within exec function calls where the tagName parameter is directly formatted and executed without any sanitization or validation mechanisms. This creates an environment where malicious actors can manipulate the input to execute arbitrary code on the target system. The vulnerability falls under the category of command injection attacks and aligns with CWE-77 and CWE-94, which specifically address improper neutralization of special elements used in OS commands and code injection respectively. The flaw demonstrates a classic lack of input validation and output encoding that enables attackers to bypass security controls and execute unintended operations.
The operational impact of CVE-2020-7688 extends beyond simple command execution to potentially enable full system compromise and data exfiltration. Attackers can leverage this vulnerability to escalate privileges, install backdoors, modify system configurations, or access sensitive information stored within the affected environment. The vulnerability's severity is compounded by its potential for automated exploitation, making it particularly dangerous in environments where multiple systems may be exposed to the same attack vector. According to ATT&CK framework, this vulnerability maps to T1059.001 (Command and Scripting Interpreter: PowerShell) and T1068 (Exploitation for Privilege Escalation) techniques, indicating the potential for both user-level and system-level compromise.
Mitigation strategies for CVE-2020-7688 require immediate implementation of robust input validation and sanitization controls. Organizations should implement strict parameter validation for all user inputs that are later used in execution contexts, employing whitelisting approaches rather than blacklisting methods. The recommended solution involves using secure coding practices that prevent direct injection of user data into exec functions, including proper escaping of special characters and implementation of privilege separation mechanisms. Additionally, regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other parts of the application stack, ensuring comprehensive protection against command injection attacks.