CVE-2021-44675 in ServiceDesk Plus MSP
Summary
by MITRE • 12/20/2021
Zoho ManageEngine ServiceDesk Plus MSP before 10.5 Build 10534 is vulnerable to unauthenticated remote code execution due to a filter bypass in which authentication is not required.
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Analysis
by VulDB Data Team • 12/25/2021
The vulnerability identified as CVE-2021-44675 affects Zoho ManageEngine ServiceDesk Plus MSP versions prior to 10.5 Build 10534, presenting a critical security flaw that allows unauthenticated remote code execution. This represents a severe degradation of the system's security posture where attackers can bypass authentication mechanisms entirely, gaining unrestricted access to the underlying operating system without requiring valid credentials. The flaw specifically resides in a filter bypass mechanism that should have enforced authentication requirements but failed to do so properly.
This vulnerability operates at the intersection of multiple security controls and demonstrates a fundamental failure in the application's access control implementation. The filter bypass allows malicious actors to exploit the system's authentication layer, potentially enabling them to execute arbitrary code with the privileges of the service account running the application. The impact extends beyond simple data theft to include complete system compromise, data manipulation, and potential lateral movement within network environments where the service is deployed. According to CWE classification, this vulnerability maps to CWE-287 - Improper Authentication, which encompasses issues where authentication mechanisms are bypassed or weakly implemented.
The operational impact of this vulnerability is substantial as it affects organizations relying on Zoho ManageEngine ServiceDesk Plus MSP for their IT service management operations. Attackers can exploit this flaw to gain full administrative control over the affected system, potentially leading to data breaches, system corruption, and service disruption. The unauthenticated nature of the exploit means that no prior access credentials are required, making it particularly dangerous as it can be exploited by anyone who can reach the targeted system. This vulnerability directly aligns with ATT&CK technique T1059.001 - Command and Scripting Interpreter, as successful exploitation would enable adversaries to execute commands on the compromised system.
Organizations should immediately implement mitigations including applying the vendor-provided patch for ServiceDesk Plus MSP version 10.5 Build 10534 or later, which addresses the authentication bypass issue. Network segmentation and firewall rules should be implemented to restrict access to the affected system, limiting exposure to only trusted networks and IP addresses. Additionally, organizations should monitor network traffic for suspicious activity that might indicate exploitation attempts, particularly focusing on unusual command execution patterns or unexpected connections to the service. Regular security assessments and vulnerability scanning should be conducted to identify any potential exploitation attempts and to ensure that all systems remain protected against similar vulnerabilities. The remediation process should include comprehensive log analysis to determine if any unauthorized access has occurred, and security teams should verify that the patch has been applied correctly across all affected systems.