CVE-2017-0022 in Windows
Summary
by MITRE
Microsoft XML Core Services (MSXML) in Windows 10 Gold, 1511, and 1607; Windows 7 SP1; Windows 8.1; Windows RT 8.1; Windows Server 2008 SP2 and R2 SP1; Windows Server 2012 Gold and R2; Windows Server 2016; and Windows Vista SP2 improperly handles objects in memory, allowing attackers to test for files on disk via a crafted web site, aka "Microsoft XML Information Disclosure Vulnerability."
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Analysis
by VulDB Data Team • 12/24/2024
The vulnerability identified as CVE-2017-0022 affects Microsoft XML Core Services (MSXML) across multiple Windows operating systems including various versions of Windows 10, Windows 7, Windows 8.1, Windows Server 2008, Windows Server 2012, and Windows Vista. This issue stems from improper handling of objects in memory within the MSXML component which is responsible for processing XML data in Windows applications. The vulnerability specifically allows attackers to perform information disclosure attacks by testing for the existence of files on the target system through a crafted web page, making it a significant security concern for enterprise environments.
The technical flaw resides in the way MSXML processes certain XML objects in memory, creating a condition where attackers can craft malicious web content that triggers memory access patterns revealing file system information. This vulnerability operates at the application level and leverages the XML processing capabilities that are widely used across Windows applications and web services. The memory handling issue enables attackers to infer the presence or absence of specific files on the target system without necessarily gaining direct access to their contents, which constitutes a form of information disclosure attack that can be used to map the target environment.
The operational impact of this vulnerability extends beyond simple file enumeration as it can be exploited in conjunction with other attack vectors to build comprehensive reconnaissance profiles of target systems. Attackers can use this vulnerability to determine which files exist on a system, potentially identifying sensitive documents, configuration files, or system artifacts that could be targeted in subsequent attacks. This information disclosure capability aligns with attack techniques documented in the MITRE ATT&CK framework under information gathering and reconnaissance phases, where adversaries seek to understand target environments before executing more sophisticated attacks. The vulnerability affects systems running multiple Windows versions, making it particularly dangerous as it can be exploited across various enterprise environments simultaneously.
Organizations should implement immediate mitigations including applying the relevant Microsoft security updates that address this memory handling issue in MSXML components. Network segmentation and web application firewalls can help limit exposure by blocking access to potentially malicious web content that could exploit this vulnerability. Additionally, security monitoring should be enhanced to detect unusual patterns of file system access attempts that might indicate exploitation of this vulnerability. The vulnerability maps to CWE-200, which describes "Information Exposure," and represents a classic example of how improper handling of application objects can lead to unintended information disclosure. System administrators should also consider implementing automated patch management solutions to ensure all affected Windows systems receive security updates promptly, as this vulnerability could be exploited in zero-day attacks before organizations have time to deploy mitigations.