The rpza_decode_stream function in libavcodec/rpza.c in FFmpeg before 2.1 does not properly maintain a pointer to pixel data, which allows remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via crafted Apple RPZA data.
https://security.gentoo.org/glsa/201603-06
http://openwall.com/lists/oss-security/2013/12/08/3