CVE-2020-7631 in diskusage-ng
Summary
by MITRE
diskusage-ng through 0.2.4 is vulnerable to Command Injection.It allows execution of arbitrary commands via the path argument.
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Analysis
by VulDB Data Team • 05/17/2024
The CVE-2020-7631 vulnerability affects diskusage-ng versions 0.2.4 and earlier, presenting a critical command injection flaw that enables attackers to execute arbitrary commands on the affected system. This vulnerability specifically manifests through the path argument parameter, which is improperly handled within the application's command execution logic. The flaw stems from insufficient input validation and sanitization, allowing malicious users to inject command sequences that get executed with the privileges of the affected application.
This vulnerability falls under the CWE-77 category, which represents "Command Injection," a well-documented weakness in software applications where user-supplied data is directly incorporated into system commands without proper sanitization. The ATT&CK framework classifies this under T1059.001 "Command and Scripting Interpreter: PowerShell" and T1059.003 "Command and Scripting Interpreter: Windows Command Shell" as it enables adversaries to execute arbitrary commands on the target system. The vulnerability exists because the application directly concatenates user input into shell commands without appropriate escaping or validation mechanisms.
The operational impact of this vulnerability is severe, as it allows remote attackers to gain full command execution capabilities on the affected system. An attacker could leverage this vulnerability to execute malicious commands such as creating backdoors, exfiltrating sensitive data, modifying system configurations, or escalating privileges to gain administrative access. The vulnerability affects systems where diskusage-ng is installed and running, potentially compromising entire networks if the application is used in enterprise environments. The command injection occurs at the system level, meaning that commands execute with the privileges of the user running the diskusage-ng application, which could be a privileged account.
Mitigation strategies for CVE-2020-7631 should focus on immediate patching of the affected software to version 0.2.5 or later, which contains the necessary fixes for input validation. Organizations should implement proper input sanitization techniques, including parameter validation and escaping of special characters, to prevent command injection attacks. Network segmentation and privilege separation can help limit the potential impact if exploitation occurs. Additionally, implementing web application firewalls and intrusion detection systems can help detect and prevent exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in other applications. The fix typically involves proper input validation and the use of safe API calls instead of direct shell command execution, aligning with secure coding practices recommended by OWASP and other security frameworks.