A User Mode Write AV in ntdll!RtlpCoalesceFreeBlocks+0x268 of WildBit Viewer v6.6 allows attackers to cause a denial of service (DoS) via a crafted tiff file.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-23894
Reference (s):
- https://github.com/Aurorainfinity/vulnerabilities/blob/master/WildBit_Viewer/tiff_file_format.md
- https://www.wildbit-soft.fi/software.html