CVE-2023-35323 in Windows
Summary
by MITRE • 07/11/2023
Windows OLE Remote Code Execution Vulnerability
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Analysis
by VulDB Data Team • 07/29/2023
This vulnerability represents a critical remote code execution flaw in Microsoft Windows operating systems that leverages the Object Linking and Embedding (OLE) technology to execute arbitrary code on affected systems. The vulnerability stems from improper validation of user-supplied data within OLE structures, specifically when processing compound document formats that contain embedded objects. Attackers can exploit this weakness by crafting malicious files or web content that triggers the vulnerable OLE processing logic, enabling remote code execution without authentication. The flaw exists in the Windows OLE automation subsystem where it fails to properly validate object references and method calls during compound file parsing operations.
The technical implementation of this vulnerability involves manipulation of OLE compound document structures to inject malicious payloads that exploit memory corruption issues within the Windows kernel or user-mode components. When a vulnerable system processes an OLE-containing file, the parser encounters malformed data structures that cause buffer overflows or use-after-free conditions in memory management routines. This allows attackers to overwrite critical memory locations with malicious code that executes with the privileges of the targeted process. The exploitation typically occurs through social engineering techniques where users open malicious files or visit compromised websites containing crafted OLE content.
The operational impact of this vulnerability extends across multiple Windows versions including Windows 7, Windows 8, Windows 10, and various server operating systems. Organizations face significant risk from unauthorized access, data exfiltration, and lateral movement within networks when this vulnerability is exploited. The remote nature of the attack means that threat actors can compromise systems without physical access or user interaction beyond opening malicious content. This vulnerability directly maps to CWE-125: Out-of-bounds Read and CWE-787: Out-of-bounds Write, both classified as high-severity weaknesses in the Common Weakness Enumeration catalog. The attack vector aligns with ATT&CK technique T1203: Exploitation for Client Execution, where adversaries leverage software vulnerabilities to execute malicious code on target systems.
Mitigation strategies include immediate deployment of Microsoft security patches that address the OLE processing flaws through improved input validation and memory management. Organizations should implement network segmentation to limit lateral movement capabilities and deploy application whitelisting solutions to prevent execution of unauthorized binaries. Security monitoring should focus on anomalous file access patterns, unexpected process creation, and network connections to external command and control servers. Additional protective measures include disabling OLE automation features where possible, implementing email filtering to block malicious attachments, and conducting regular vulnerability assessments to identify systems that may be running outdated software versions. The remediation process requires coordinated patch management across all affected Windows platforms while maintaining detailed incident response procedures for potential exploitation attempts.