CVE-2020-0614 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists in the way that the Windows Search Indexer handles objects in memory, aka 'Windows Search Indexer Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-0613, CVE-2020-0623, CVE-2020-0625, CVE-2020-0626, CVE-2020-0627, CVE-2020-0628, CVE-2020-0629, CVE-2020-0630, CVE-2020-0631, CVE-2020-0632, CVE-2020-0633.
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Analysis
by VulDB Data Team • 03/21/2024
The Windows Search Indexer elevation of privilege vulnerability represents a critical security flaw that allows attackers to escalate their privileges within Windows operating systems. This vulnerability specifically affects the Windows Search service component responsible for indexing files and content to enable fast search functionality across the system. The flaw manifests in how the indexer processes and handles objects in memory, creating an opportunity for malicious actors to execute arbitrary code with elevated privileges. This vulnerability impacts multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it particularly concerning given the widespread deployment of these systems in enterprise environments.
The technical nature of this vulnerability stems from improper memory handling within the Windows Search Indexer service. When processing certain file types or content, the indexer fails to properly validate memory objects, potentially leading to memory corruption conditions. This memory handling flaw creates opportunities for attackers to craft malicious inputs that can trigger buffer overflows or other memory corruption scenarios. The vulnerability is classified under CWE-121 as a stack-based buffer overflow, which allows for arbitrary code execution when the corrupted memory is subsequently processed. Attackers can exploit this by placing specially crafted content within indexed files or directories, which when processed by the search indexer, triggers the memory corruption and privilege escalation.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with a persistent foothold within targeted systems. Once successfully exploited, the attacker gains the ability to execute code with system-level privileges, enabling them to install malware, modify system files, access sensitive data, or establish backdoors. The vulnerability's stealthy nature makes detection challenging since the exploitation occurs through normal indexing operations, potentially going unnoticed by traditional security monitoring tools. The attack vector typically involves placing malicious content in locations that will be indexed by Windows Search, such as shared network drives or local directories, making it particularly dangerous in enterprise environments where file sharing is common.
Mitigation strategies for this vulnerability should include immediate deployment of Microsoft security updates, as the company released patches specifically addressing this issue in their regular security bulletins. System administrators should also implement additional security controls such as restricting the Windows Search service to only index necessary directories and implementing strict access controls on indexed content. Network segmentation and monitoring of search service activities can help detect anomalous indexing behavior that might indicate exploitation attempts. Organizations should also consider disabling unnecessary search indexing capabilities where possible and regularly auditing indexed content for potential malicious files. The vulnerability aligns with ATT&CK technique T1068 which covers 'Exploitation for Privilege Escalation', and T1082 which covers 'System Information Discovery', making it particularly relevant for threat hunting and incident response activities. Regular security assessments and vulnerability scanning should include verification that the patched versions are properly deployed across all affected systems to ensure comprehensive protection against this and related vulnerabilities.