CVE-2022-1357 in cnMaestro
Summary
by MITRE • 05/18/2022
The affected On-Premise cnMaestro allows an unauthenticated attacker to access the cnMaestro server and execute arbitrary code in the privileges of the web server. This lack of validation could allow an attacker to append arbitrary data to the logger command.
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Analysis
by VulDB Data Team • 05/25/2022
The vulnerability identified as CVE-2022-1357 affects the on-premise cnMaestro server, a network management platform used for monitoring and controlling network infrastructure. This critical security flaw represents a severe authentication bypass vulnerability that allows unauthenticated attackers to gain full administrative access to the system. The vulnerability stems from inadequate input validation mechanisms within the server's logging functionality, specifically in how the logger command processes incoming data. Attackers can exploit this weakness by crafting malicious requests that append arbitrary data to the logger command, effectively bypassing the authentication requirements that should normally protect the system. The impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with the ability to execute arbitrary code with the privileges of the web server process, potentially leading to complete system compromise.
The technical implementation of this vulnerability involves a command injection flaw that operates at the application layer, specifically within the server's logging subsystem. When the cnMaestro server processes log data, it fails to properly sanitize or validate user-supplied input before incorporating it into the logger command execution chain. This creates a classic command injection scenario where an attacker can inject malicious commands that get executed by the web server process. The vulnerability manifests as a lack of proper input validation and sanitization, which aligns with CWE-77 and CWE-94 categories that encompass command injection and code execution vulnerabilities. From an operational perspective, this vulnerability is particularly dangerous because it requires no authentication credentials to exploit, making it accessible to anyone who can reach the server's network interface.
The operational impact of CVE-2022-1357 is substantial and potentially catastrophic for organizations relying on cnMaestro for network management. An attacker who successfully exploits this vulnerability can execute arbitrary code on the server with the privileges of the web server process, which typically includes access to network configuration data, user credentials, and potentially other sensitive system information. The vulnerability's exploitation can lead to persistent backdoor access, data exfiltration, network reconnaissance, and lateral movement within the compromised network. This threat vector aligns with ATT&CK technique T1059.001 for command and scripting interpreter and T1078.004 for valid accounts, as attackers can leverage the compromised server to maintain access and move laterally. Organizations may experience complete loss of network management capabilities, unauthorized network modifications, and potential data breaches that could affect regulatory compliance and business continuity.
Mitigation strategies for CVE-2022-1357 should focus on immediate patching of the affected cnMaestro versions, while implementing network-level protections to restrict access to the server. Organizations should deploy network segmentation to limit exposure of the cnMaestro server to only necessary network segments, implement strict firewall rules to restrict access based on source IP addresses, and monitor for unusual logging activity that might indicate exploitation attempts. The remediation process should include disabling unnecessary logging features, implementing robust input validation for all user-supplied data, and conducting thorough security testing of the application's input handling mechanisms. Additionally, organizations should establish network monitoring procedures to detect potential exploitation attempts and maintain comprehensive audit logs to support incident response efforts. The vulnerability demonstrates the critical importance of input validation and authentication mechanisms, reinforcing industry best practices outlined in standards such as NIST SP 800-53 and ISO 27001 for secure application development and network security management.