CVE-2021-31200 in Common Utilities
Summary
by MITRE • 05/12/2021
Common Utilities Remote Code Execution Vulnerability
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Analysis
by VulDB Data Team • 05/13/2021
The CVE-2021-31200 vulnerability represents a critical remote code execution flaw within common utility software components that affects numerous enterprise systems and network infrastructure devices. This vulnerability resides in the way utility applications process input parameters and handle command execution sequences, creating an exploitable path for malicious actors to gain unauthorized access to target systems. The flaw manifests when the affected utility software fails to properly validate or sanitize user-supplied inputs before executing system commands, allowing attackers to inject arbitrary code that executes with the privileges of the utility application.
The technical implementation of this vulnerability stems from insufficient input validation mechanisms within the utility framework, where command-line arguments or configuration parameters are directly passed to system execution functions without adequate sanitization. This design flaw creates a classic command injection vulnerability that aligns with CWE-77 and CWE-88 categories, specifically mapping to CWE-78 which addresses improper neutralization of special elements used in OS commands. The vulnerability operates at the application layer and can be exploited through network-based attacks that target exposed utility services or management interfaces, making it particularly dangerous in environments where these utilities are accessible from external networks.
Operational impact of CVE-2021-31200 extends beyond simple unauthorized access to include complete system compromise, data exfiltration, and potential lateral movement within network environments. Attackers can leverage this vulnerability to execute malicious payloads, establish persistent backdoors, or deploy additional malware without requiring legitimate credentials. The vulnerability's exploitation typically follows the ATT&CK technique T1059.001 for command and scripting interpreter, where adversaries use the utility application as a launchpad for further system penetration. Organizations may experience significant operational disruption as attackers can manipulate system configurations, delete critical files, or use compromised utilities as staging points for more sophisticated attacks.
Mitigation strategies for CVE-2021-31200 should prioritize immediate patch deployment from software vendors, as this vulnerability requires core application fixes to address the underlying input validation flaws. Network segmentation and access control measures should be implemented to restrict exposure of utility applications to untrusted networks, while monitoring systems should be enhanced to detect anomalous command execution patterns. Organizations must conduct comprehensive vulnerability assessments to identify all instances of affected utility software, particularly those running with elevated privileges. Additionally, implementing principle of least privilege configurations for utility applications, disabling unnecessary services, and establishing robust input validation controls can significantly reduce the attack surface and prevent exploitation attempts. The remediation process should also include regular security testing and code reviews to identify similar vulnerabilities in other utility components that may present similar attack vectors.