CVE-2017-8544 in Windows
Summary
by MITRE
Microsoft Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allow an attacker to obtain information to further compromise the user's system when Windows Search fails to handle objects in memory, aka "Windows Search Information Disclosure Vulnerability".
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Analysis
by VulDB Data Team • 08/21/2024
The vulnerability identified as CVE-2017-8544 represents a critical information disclosure flaw within Microsoft Windows search functionality that affects multiple operating system versions including Windows 7 through Windows 10. This vulnerability stems from improper handling of memory objects within the Windows Search component, creating an avenue for attackers to extract sensitive information that could facilitate further compromise of affected systems. The flaw specifically manifests when Windows Search processes certain objects in memory without adequate validation or sanitization, potentially exposing system internals to unauthorized access.
From a technical perspective, this vulnerability operates as an information disclosure mechanism that leverages the Windows Search service's failure to properly validate memory objects during processing operations. The root cause aligns with CWE-200, which categorizes weaknesses related to exposure of sensitive information to an unauthorized actor. Attackers can exploit this vulnerability by crafting malicious content that, when processed by Windows Search, triggers memory handling errors that inadvertently reveal system information. The vulnerability's impact extends across multiple Windows versions, indicating a systemic issue within the search component architecture that affects both desktop and server operating systems.
The operational impact of CVE-2017-8544 is significant as it provides threat actors with valuable reconnaissance data that can be used to enhance subsequent attacks. Information disclosure vulnerabilities of this nature often serve as stepping stones in broader attack chains, enabling attackers to gather system details that can be used for privilege escalation or lateral movement within compromised networks. The vulnerability's presence in Windows Search means that any content indexed by the system could potentially be exploited, including documents, emails, and other files that users might process through the search functionality. This creates a persistent risk vector that remains active as long as the search service is operational.
Security professionals should consider this vulnerability in the context of the MITRE ATT&CK framework, particularly under the information gathering and privilege escalation tactics where information disclosure serves as a foundational element for more sophisticated attacks. The vulnerability's exploitation typically follows the initial reconnaissance phase where attackers identify system weaknesses before proceeding with more targeted attacks. Organizations should implement immediate mitigations including applying Microsoft security patches, disabling unnecessary search functionality where possible, and implementing network monitoring to detect potential exploitation attempts. The vulnerability's classification as a memory handling issue also suggests that defensive measures should include memory integrity checks and process isolation to prevent unauthorized information extraction.
Microsoft addressed this vulnerability through security updates that improved the memory handling within Windows Search components, specifically targeting the improper object processing that led to information disclosure. The fix involved strengthening input validation and memory management within the search service to prevent the exposure of sensitive data during normal operation. Organizations should prioritize patch deployment across all affected Windows versions and consider implementing additional security controls such as application whitelisting and enhanced monitoring of search service activities to detect potential exploitation attempts.