CVE-2021-34082 in allenhwkim
Summary
by MITRE • 06/02/2022
OS Command Injection vulnerability in allenhwkim proctree through 0.1.1 and commit 0ac10ae575459457838f14e21d5996f2fa5c7593 for Node.js, allows attackers to execute arbitrary commands via the fix function.
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Analysis
by VulDB Data Team • 06/05/2022
The CVE-2021-34082 vulnerability represents a critical operating system command injection flaw discovered in the allenhwkim proctree Node.js module version 0.1.1 and earlier. This vulnerability resides within the fix function of the proctree package, which is commonly used for process tree traversal and management in Node.js applications. The flaw enables attackers to inject and execute arbitrary operating system commands through malicious input manipulation, potentially compromising the entire underlying system where the vulnerable package is deployed. This type of vulnerability is particularly dangerous in environments where Node.js applications interact with system-level processes or execute commands based on user input.
The technical implementation of this vulnerability stems from improper input validation and sanitization within the fix function of the proctree module. When the module processes user-supplied data or system information that is not properly escaped or validated, attackers can inject malicious command sequences that get executed by the operating system shell. The vulnerability manifests when the application passes untrusted input directly into system commands without adequate sanitization, creating a direct pathway for command injection attacks. This flaw aligns with CWE-77 which specifically addresses command injection vulnerabilities, where insufficient protection against command injection allows attackers to execute arbitrary commands with the privileges of the affected application.
The operational impact of CVE-2021-34082 extends beyond simple code execution, potentially enabling attackers to gain complete control over affected systems. An attacker could leverage this vulnerability to execute system commands such as file manipulation, network reconnaissance, privilege escalation, or even establish persistent backdoors within the compromised environment. The vulnerability affects Node.js applications that utilize the proctree module, particularly those running on Unix-like systems where command injection attacks are most effective. This poses significant risks in production environments where Node.js applications may be running with elevated privileges, potentially allowing attackers to compromise entire server infrastructures or access sensitive data stored on the system.
Security mitigations for this vulnerability primarily involve immediate remediation through package updates and proper input validation practices. Organizations should upgrade to the latest version of the proctree module where the vulnerability has been patched, though specific patch information for this CVE may require verification from the maintainers or security advisories. Additionally, implementing proper input sanitization and validation techniques, such as using parameterized commands or command whitelisting, can prevent exploitation attempts. The mitigation strategy should also include reviewing all applications that utilize the proctree module and ensuring that any user-supplied data is properly validated before being processed by system commands. This vulnerability demonstrates the importance of following secure coding practices and adhering to the principle of least privilege when executing system-level operations, aligning with ATT&CK technique T1059.001 for command and scripting interpreter. Organizations should also consider implementing network segmentation and monitoring to detect potential exploitation attempts, as command injection attacks often generate suspicious network traffic or system logs that can serve as early warning indicators of compromise.