CVE-2020-1263 in Windows
Summary
by MITRE
An information disclosure vulnerability exists in the way Windows Error Reporting (WER) handles objects in memory, aka 'Windows Error Reporting Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2020-1261.
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Analysis
by VulDB Data Team • 10/23/2020
The Windows Error Reporting information disclosure vulnerability represents a critical security flaw in Microsoft's error handling infrastructure that could potentially expose sensitive system information to unauthorized parties. This vulnerability specifically affects how Windows Error Reporting processes memory objects during error condition handling, creating an unintended information leakage channel that adversaries could exploit to gather system intelligence. The flaw exists within the core Windows operating system components that manage application crashes and system errors, making it particularly concerning given the widespread use of Windows platforms across enterprise and consumer environments. The vulnerability's designation as CVE-2020-1263 distinguishes it from related issues such as CVE-2020-1261, which addresses different aspects of Windows error reporting functionality.
Technical exploitation of this vulnerability occurs when Windows Error Reporting attempts to serialize and store error information in memory, potentially including sensitive data from the application or system processes that were running when the error occurred. The flaw manifests in improper memory handling where error reporting components fail to adequately sanitize memory contents before storing or transmitting error data, allowing for the potential exposure of confidential information such as user credentials, application data, or system configuration details. This type of information disclosure vulnerability falls under CWE-200, which specifically addresses the exposure of sensitive information to an unauthorized actor, and represents a classic example of how improper data handling in system components can create security risks. The vulnerability typically requires minimal privileges to exploit, as it operates within the existing Windows error reporting framework that is designed to run with standard user permissions.
The operational impact of this vulnerability extends beyond simple information disclosure, as the leaked data could provide attackers with valuable intelligence for subsequent attacks. An adversary who successfully exploits this vulnerability could potentially gather system fingerprints, application memory contents, or other sensitive information that could be used to tailor more sophisticated attacks against the target system. The vulnerability affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, creating a broad attack surface that could impact organizations with diverse Windows deployments. This information disclosure could enable attackers to perform reconnaissance activities more effectively, potentially leading to privilege escalation or lateral movement within the compromised network environment. The vulnerability's impact is particularly severe in enterprise environments where Windows Error Reporting is actively used to collect error information from multiple endpoints.
Mitigation strategies for this vulnerability should focus on both immediate patching and operational security improvements. Microsoft released security updates in the July 2020 security bulletin that address this specific flaw by correcting the memory handling behavior in Windows Error Reporting components. Organizations should prioritize applying these updates across all affected Windows systems, particularly those running in enterprise environments where the risk of exploitation is higher. System administrators should also consider implementing additional monitoring for unusual error reporting activity that might indicate exploitation attempts, as well as reviewing existing security policies to ensure that error reporting configurations do not inadvertently expose sensitive information. The vulnerability's characteristics align with ATT&CK technique T1082, which covers system information discovery, as the leaked information could be used to gather system characteristics that would aid in further exploitation activities. Network segmentation and access controls should be reviewed to limit the potential impact of any successful exploitation attempts, while security teams should monitor for indicators of compromise related to abnormal error reporting behavior.