tools/pal2rgb.c in pal2rgb in LibTIFF 4.0.9 allows remote attackers to cause a denial of service (TIFFSetupStrips heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted TIFF file.
https://www.exploit-db.com/exploits/43322/
https://www.debian.org/security/2018/dsa-4349
https://usn.ubuntu.com/3606-1/
https://security.gentoo.org/glsa/202003-25
https://lists.debian.org/debian-lts-announce/2019/11/msg00027.html