CVE-2019-0882 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-2019-0758, CVE-2019-0961.
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Analysis
by VulDB Data Team • 06/09/2020
The Windows GDI (Graphics Device Interface) component serves as a critical interface between applications and graphics hardware, managing graphical operations and rendering tasks across the operating system. This vulnerability specifically targets the memory management practices within GDI, creating an information disclosure scenario that could potentially expose sensitive data stored in system memory. The flaw manifests when GDI processes certain graphical operations without proper memory boundary checks, allowing unauthorized access to memory contents that should remain protected. This represents a significant security concern as it could enable attackers to extract confidential information from system memory, potentially including credentials, application data, or other sensitive materials.
The technical implementation of this vulnerability involves improper handling of memory references within GDI operations, where the component fails to validate memory boundaries during graphical processing tasks. When applications interact with GDI to perform drawing operations, the vulnerable code path does not adequately protect against memory access violations that could result in data leakage. This issue falls under the broader category of memory safety vulnerabilities and aligns with CWE-125 which addresses out-of-bounds read conditions. The vulnerability specifically impacts Windows operating systems where GDI is utilized for graphical rendering, creating a persistent risk across multiple system components that rely on graphical interfaces for their operation.
The operational impact of this information disclosure vulnerability extends beyond simple data exposure, as it could potentially enable more sophisticated attacks when combined with other exploitation techniques. Attackers could leverage this vulnerability to gather system information, application memory contents, or even partial credentials stored in memory, which could then be used to facilitate further compromise. The vulnerability affects the integrity of the Windows security model by creating potential pathways for unauthorized memory access, undermining the isolation guarantees that system components should maintain. This type of vulnerability is particularly concerning in enterprise environments where Windows systems handle sensitive corporate data and where attackers may seek to escalate privileges or extract valuable information.
Mitigation strategies for this vulnerability should focus on implementing proper memory boundary checking within GDI operations and applying Microsoft security updates as soon as they become available. System administrators should prioritize patch management processes to ensure all Windows systems receive the necessary security updates that address this memory disclosure issue. Network monitoring should be enhanced to detect unusual memory access patterns that might indicate exploitation attempts, while application developers should review their use of GDI functions to ensure proper error handling and memory validation. The vulnerability's classification under ATT&CK technique T1059 indicates potential for abuse in command execution contexts, making it important for security teams to consider this risk in their overall threat modeling and incident response planning. Organizations should also implement memory protection mechanisms such as DEP (Data Execution Prevention) and ASLR (Address Space Layout Randomization) to reduce the effectiveness of potential exploitation attempts.