CVE-2021-27922

Pillow versiones anteriores a 8.1.1, permite a atacantes causar una denegación de servicio (consumo de la memoria) porque el tamaño reportado de una imagen contenida no es comprobado apropiadamente para un contenedor ICNS y, por lo tanto, un intento de asignación de la memoria puede ser muy grande

A flaw was found in python-pillow. Attackers can cause a denial of service (memory consumption) because the reported size of a contained image is not properly checked for an ICNS container, and thus an attempted memory allocation can be very large.

It was discovered that Pillow incorrectly handled certain Tiff image files. If a user or automated system were tricked into opening a specially-crafted Tiff file, a remote attacker could cause Pillow to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 20.04 LTS and Ubuntu 20.10. It was discovered that Pillow incorrectly handled certain Tiff image files. If a user or automated system were tricked into opening a specially-crafted Tiff file, a remote attacker could cause Pillow to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.