CVE-2019-1344 in Windows
Summary
by MITRE
An information disclosure vulnerability exists in the way that the Windows Code Integrity Module handles objects in memory, aka 'Windows Code Integrity Module Information Disclosure Vulnerability'.
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Analysis
by VulDB Data Team • 10/14/2025
The Windows Code Integrity Module represents a critical security component within the Windows operating system responsible for enforcing code integrity policies and preventing the execution of unauthorized or malicious code. This module operates at the kernel level and maintains strict controls over executable code signatures and digital certificates to ensure system stability and security. The vulnerability identified as CVE-2019-1344 stems from improper handling of memory objects within this module, creating an information disclosure pathway that could potentially expose sensitive system data. The flaw manifests when the Code Integrity Module processes certain objects in memory without adequate validation or sanitization, allowing unauthorized access to memory contents that should remain protected.
This information disclosure vulnerability specifically affects how the Windows Code Integrity Module manages memory objects during code verification processes. The technical flaw resides in the insufficient boundary checking and memory management procedures within the kernel-level code integrity subsystem. When legitimate code integrity checks are performed, the module fails to properly isolate or clear sensitive memory regions, resulting in potential leakage of kernel memory contents to user-mode applications. The vulnerability operates at the intersection of kernel security mechanisms and memory management protocols, creating a pathway where attacker-controlled processes could potentially access information that should remain confidential within the system's protected memory space. This issue falls under the broader category of memory corruption vulnerabilities and can be classified as a CWE-200 (Information Exposure) with potential implications for privilege escalation and system compromise.
The operational impact of this vulnerability extends beyond simple information disclosure, as it could enable attackers to gather sensitive kernel memory information that might reveal system internals, security policy configurations, or even cryptographic keys used for code signing. Attackers could potentially leverage this information to craft more sophisticated attacks, bypass security controls, or develop targeted exploits against other system components. The vulnerability affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it a widespread concern across enterprise environments. Organizations utilizing Windows systems without proper patch management could face significant risks, as the information disclosure could provide attackers with insights into system configurations and security implementations that would otherwise remain hidden.
Mitigation strategies for CVE-2019-1344 primarily involve applying the official Microsoft security updates released in the July 2019 Patch Tuesday cycle, which address the memory handling issues within the Code Integrity Module. System administrators should prioritize patch deployment across all affected Windows systems, particularly those running server environments or handling sensitive data. Additional protective measures include implementing strict code integrity policies, monitoring for unusual memory access patterns, and maintaining comprehensive system logging to detect potential exploitation attempts. The vulnerability aligns with ATT&CK technique T1059 (Command and Scripting Interpreter) and T1068 (Exploitation for Privilege Escalation) when exploited, as attackers might use the leaked information to refine their attacks. Organizations should also consider implementing memory protection mechanisms such as Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR) to further reduce the attack surface and limit the effectiveness of potential exploitation attempts.