CVE-2020-0987: 
vulnerability analysis and mitigation

An information disclosure vulnerability (CVE-2020-0987) exists in the Microsoft Windows Graphics Component when it improperly handles objects in memory. The vulnerability was disclosed on April 15, 2020, and affects multiple versions of Microsoft Windows including Windows 10, Windows 8.1, and Windows 7 SP1. This vulnerability is distinct from CVE-2020-0982 and CVE-2020-1005 (NVD).

The vulnerability specifically exists within the processing of EMF images in both gdi32full.dll and mf3216.dll components. The flaw occurs when processing EMR_SETDIBITSTODEVICE records in EMF images, which can trigger a read past the end of an allocated buffer. The vulnerability has been assigned a CVSS v3.1 base score of 5.5 (Medium) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N, indicating local access is required (NVD, ZDI-20-647).

If successfully exploited, this vulnerability allows attackers to disclose sensitive information from affected Windows systems. The vulnerability could potentially be leveraged in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process (ZDI-20-876).

Microsoft has released security updates to address this vulnerability. Users are advised to apply the appropriate patches through the Microsoft security advisory (MSRC).