Ubuntu Security Notice 2553-1 – William Robinet discovered that LibTIFF incorrectly handled certain malformed images. If a user or automated system were tricked into opening a specially crafted image, a remote attacker could crash the application, leading to a denial of service, or possibly execute arbitrary code with user privileges. Paris Zoumpouloglou discovered that LibTIFF incorrectly handled certain malformed BMP images. If a user or automated system were tricked into opening a specially crafted BMP image, a remote attacker could crash the application, leading to a denial of service. Various other issues were also addressed.