CVE-2018-8790 in ZoneAlarm
Summary
by MITRE
Check Point ZoneAlarm version 15.3.064.17729 and below expose a WCF service that can allow a local low privileged user to execute arbitrary code as SYSTEM.
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Analysis
by VulDB Data Team • 07/26/2023
The vulnerability identified as CVE-2018-8790 affects Check Point ZoneAlarm version 15.3.064.17729 and earlier releases, presenting a critical privilege escalation risk through a Windows Communication Foundation WCF service exposure. This flaw enables local low-privileged users to execute arbitrary code with SYSTEM-level privileges, fundamentally compromising the security posture of affected systems. The vulnerability stems from improper access controls within the ZoneAlarm service implementation, creating an attack vector that directly violates the principle of least privilege and system integrity.
The technical implementation of this vulnerability involves a WCF service endpoint that lacks appropriate authentication and authorization mechanisms, allowing local users to invoke service methods that should only be accessible to system-level processes. This misconfiguration creates a path for privilege escalation where a low-privileged user can leverage the service interface to execute malicious code with elevated privileges. The flaw specifically impacts the ZoneAlarm service that runs with SYSTEM privileges, making it an attractive target for attackers seeking to gain administrative control over affected systems. The vulnerability aligns with CWE-284, which addresses improper access control, and represents a classic case of privilege escalation through service manipulation.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with a persistent foothold that can be leveraged for further system compromise. Once exploited, the attacker can execute commands with SYSTEM privileges, potentially leading to complete system compromise, data exfiltration, or establishment of backdoors. The vulnerability affects organizations using Check Point ZoneAlarm versions prior to the patched release, creating a window of opportunity for attackers who understand the service interface and can craft appropriate payloads. This type of vulnerability is particularly concerning in enterprise environments where ZoneAlarm is commonly deployed as a security solution, as it undermines the very security controls that organizations rely upon.
Organizations should immediately implement mitigations including patching to the latest ZoneAlarm version that addresses this vulnerability, which typically involves applying the vendor-provided security update. System administrators should also consider implementing additional monitoring to detect unauthorized WCF service access attempts and review service configurations to ensure that only authorized processes can interact with the ZoneAlarm service endpoints. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques, specifically targeting the use of services for privilege escalation and potentially leveraging Windows communication foundation for lateral movement. Network segmentation and service hardening practices should be implemented to reduce the attack surface, and organizations should conduct comprehensive vulnerability assessments to identify any other potentially exposed services that may present similar risks.