CVE-2020-0752 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-2020-0666, CVE-2020-0667, CVE-2020-0735.
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Analysis
by VulDB Data Team • 03/30/2024
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 which is responsible for indexing files and content to enable fast search functionality across the system. The flaw exists in how the indexer processes objects in memory, creating a pathway for malicious actors to execute code with higher privileges than initially granted. Security researchers have identified this issue as distinct from other related vulnerabilities such as CVE-2020-0666, CVE-2020-0667, and CVE-2020-0735, indicating it operates through a unique exploitation vector that requires specific conditions to be met.
The technical implementation of this vulnerability stems from improper memory handling within the Windows Search Indexer component. When the indexer processes certain file types or objects, it fails to properly validate memory operations, leading to potential memory corruption scenarios. This memory handling flaw can be exploited through crafted input files or objects that trigger the indexer to process malicious data structures. The vulnerability falls under the Common Weakness Enumeration category of improper handling of memory operations, specifically related to buffer overflows or memory corruption issues that are commonly classified under CWE-121. Attackers can leverage this weakness to execute arbitrary code with elevated privileges, potentially gaining SYSTEM-level access to affected systems.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with a persistent foothold within Windows environments. Once successfully exploited, the attacker can manipulate system files, install additional malware, or establish backdoors for continued access. The Windows Search service runs with elevated privileges by default, making it an attractive target for exploitation since successful attacks can immediately yield high-value system access. This vulnerability particularly affects enterprise environments where Windows Search is actively used for indexing large volumes of data, as attackers can exploit it to compromise multiple systems simultaneously. The vulnerability can be triggered through various attack vectors including email attachments, downloaded files, or network shares that are indexed by the search service, making it a significant threat in both corporate and user environments.
Mitigation strategies for this vulnerability require immediate patch management and system hardening measures. Microsoft has released security updates addressing this flaw, and organizations should prioritize deployment of the relevant patches to prevent exploitation. System administrators should also consider implementing additional security controls such as restricting access to the Windows Search service, monitoring for unusual search activity, and employing behavioral analysis tools to detect potential exploitation attempts. The vulnerability aligns with several ATT&CK techniques including privilege escalation and persistence mechanisms, making it important for security teams to monitor for related activities in their environments. Organizations should also consider implementing least privilege principles and regularly reviewing search service configurations to minimize the attack surface. Given the nature of the vulnerability, regular security assessments and vulnerability scanning should be conducted to identify systems that may still be exposed to this threat, particularly in environments where patch deployment timelines may be delayed or incomplete.