CVE-2019-12876 in ADManager Plus
Summary
by MITRE
Zoho ManageEngine ADManager Plus 6.6.5, ADSelfService Plus 5.7, and DesktopCentral 10.0.380 have Insecure Permissions, leading to Privilege Escalation from low level privileges to System.
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Analysis
by VulDB Data Team • 11/01/2023
The vulnerability identified as CVE-2019-12876 affects multiple ManageEngine products including ADManager Plus 6.6.5, ADSelfService Plus 5.7, and DesktopCentral 10.0.380, representing a critical security flaw that allows attackers to escalate privileges from low-level user accounts to system-level access. This issue stems from insecure permissions within the software architecture, creating a pathway for unauthorized users to gain elevated privileges without proper authentication or authorization mechanisms. The vulnerability is particularly concerning as it directly impacts the core security model of these enterprise management tools, which are designed to handle sensitive directory services and system administration tasks. The insecure permissions allow attackers to manipulate access controls and bypass normal security boundaries that should protect system-level functions and sensitive data within Active Directory environments. This flaw represents a significant weakness in the principle of least privilege that should govern all enterprise security solutions.
The technical implementation of this vulnerability involves improper access control mechanisms that fail to properly validate user permissions when executing administrative functions. Attackers can exploit this weakness by leveraging the insecure permissions to perform operations that should require system-level privileges, effectively allowing them to execute arbitrary code or access restricted system resources. The flaw likely manifests through improper validation of user roles or session tokens when accessing administrative interfaces or executing privileged commands within the software. This type of vulnerability aligns with CWE-284, which describes improper access control issues where systems fail to properly enforce access restrictions, and can be categorized under ATT&CK technique T1068, which covers local privilege escalation through exploitation of system vulnerabilities. The vulnerability demonstrates a clear breakdown in the software's authorization model, where the application fails to properly enforce the distinction between standard user access and administrative capabilities.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it fundamentally compromises the security posture of organizations using these ManageEngine products. Successful exploitation allows attackers to gain complete control over the managed systems, potentially enabling them to modify Active Directory configurations, access sensitive user data, or deploy malicious software across the enterprise network. The affected systems represent critical infrastructure components that manage directory services and desktop environments, making the privilege escalation particularly dangerous as it can lead to widespread compromise of enterprise security. Organizations may experience data breaches, unauthorized access to critical systems, and potential lateral movement within their networks as attackers leverage the elevated privileges to explore and expand their access. The vulnerability affects the integrity and confidentiality of the entire directory service infrastructure, potentially exposing sensitive authentication credentials and system configurations that should remain protected.
Mitigation strategies for CVE-2019-12876 require immediate attention from organizations using the affected ManageEngine products. The primary recommendation involves applying the vendor-provided security patches and updates that address the insecure permissions issue. Organizations should also implement network segmentation to limit access to these management systems, ensuring that only authorized personnel can reach the vulnerable components. Additional defensive measures include monitoring for unusual administrative activity, implementing stricter access controls, and conducting regular security assessments of the affected software. Security teams should also consider disabling unnecessary administrative functions and implementing multi-factor authentication for all administrative accounts. The vulnerability highlights the importance of regular security testing and vulnerability management processes, as it demonstrates how seemingly minor permission flaws can lead to catastrophic security breaches. Organizations should also review their incident response procedures to ensure they can quickly detect and respond to privilege escalation attempts, as the exploitation of this vulnerability may not be immediately apparent to security monitoring systems.