CVE-2020-1179 in Windows
Summary
by MITRE
An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory, aka 'Windows GDI Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2020-0963, CVE-2020-1141, CVE-2020-1145.
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Analysis
by VulDB Data Team • 10/17/2020
The Windows Graphics Device Interface GDI component vulnerability represents a critical information disclosure flaw that affects the core graphics subsystem of Microsoft Windows operating systems. This vulnerability stems from improper memory handling within the GDI driver, which is responsible for managing graphics operations and rendering visual elements across the Windows interface. The flaw allows malicious actors to potentially access sensitive memory contents that should remain protected within the operating system's kernel space, creating a significant security risk for enterprise and enterprise-grade systems.
The technical nature of this vulnerability involves the GDI component's inadequate validation and protection mechanisms when processing graphics-related data structures. When certain graphics operations are performed through the GDI interface, the system fails to properly sanitize memory access patterns, potentially exposing kernel memory contents to user-mode applications. This improper memory disclosure occurs during the processing of graphics commands and can be exploited through crafted graphics operations that manipulate the GDI subsystem's internal memory structures. The vulnerability specifically affects Windows 10 versions and Windows Server 2019, with the flaw manifesting when the graphics driver processes malformed or specially constructed graphics data that triggers memory access violations.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can potentially enable attackers to extract sensitive kernel memory contents that may include cryptographic keys, credential information, or other confidential data. This information could then be leveraged to escalate privileges or conduct more sophisticated attacks against the targeted system. The vulnerability's exploitation requires minimal privileges and can be triggered through standard graphics operations, making it particularly dangerous for enterprise environments where graphics-intensive applications are common. Security researchers have noted that this vulnerability can be combined with other exploits to create more powerful attack vectors, as the leaked memory information can provide crucial insights into system memory layout and kernel structures.
Mitigation strategies for this vulnerability require immediate patch deployment through Microsoft's regular security updates, as the primary fix involves correcting the memory handling logic within the GDI subsystem. Organizations should prioritize patching all affected Windows 10 and Windows Server 2019 systems to prevent exploitation. Additional defensive measures include implementing application whitelisting policies to restrict graphics-intensive applications, monitoring for unusual graphics-related system calls, and employing memory protection mechanisms such as address space layout randomization. The vulnerability aligns with CWE-200, which specifically addresses "Information Exposure" in software systems, and can be mapped to ATT&CK technique T1059.007 for Windows Command Shell usage and T1068 for exploit development. Organizations should also consider implementing network segmentation to limit lateral movement potential and establish robust monitoring procedures for detecting anomalous graphics processing activities that might indicate exploitation attempts.