CVE-2024-38061 in Windows
Summary
by MITRE • 07/09/2024
DCOM Remote Cross-Session Activation Elevation of Privilege Vulnerability
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Analysis
by VulDB Data Team • 07/12/2024
This vulnerability resides in the Distributed Component Object Model implementation within Microsoft Windows operating systems, specifically affecting the cross-session activation mechanisms that enable remote code execution and privilege escalation. The flaw manifests when DCOM components attempt to activate objects across different user sessions without proper authentication and authorization checks, creating a pathway for malicious actors to execute code with elevated privileges. This vulnerability directly maps to CWE-284 Access Control and aligns with ATT&CK technique T1068 Privilege Escalation through exploitation of Windows DCOM services.
The technical implementation exploits weaknesses in the DCOM runtime environment where session boundaries are not properly enforced during object activation processes. When a user session attempts to activate a DCOM component from another session, the system fails to validate whether the requesting process has sufficient privileges to perform such cross-session operations. This allows an attacker with lower privileged access to leverage this mechanism and escalate their privileges to SYSTEM level or other high-privilege contexts within the target environment.
The operational impact of this vulnerability extends beyond simple privilege escalation as it enables attackers to bypass traditional security controls that rely on session isolation and privilege boundaries. An adversary can exploit this weakness to gain unauthorized access to sensitive system resources, modify critical files, establish persistence mechanisms, or even compromise entire domain environments when multiple systems are affected. The vulnerability is particularly dangerous in enterprise environments where DCOM services are actively used for legitimate business applications, making it difficult to detect malicious exploitation attempts.
Mitigation strategies should focus on implementing network segmentation to restrict DCOM communication between different security zones, disabling unnecessary DCOM functionality through group policy configurations, and applying the latest Microsoft security patches that address this specific vulnerability. Organizations should also monitor DCOM activation patterns and implement strict access controls using Windows Defender Application Control or similar technologies to prevent unauthorized DCOM component execution. Additionally, employing principle of least privilege approaches and regularly auditing DCOM configuration settings can significantly reduce the attack surface exposed by this vulnerability. The recommended approach combines both preventive measures through proper system hardening and detective controls through monitoring and logging of cross-session activation events.