libexif: several buffer over-reads in EXIF MakerNote handling can lead to information disclosure and DoS

A heap-buffer out-of-bounds read flaw was found in libexif's MakerNote tag parser. This flaw allows an unauthenticated attacker or authenticated attacker with low privileges to exploit the flaw remotely in an application that uses libexif to process EXIF data from media files if the file upload i...