An issue was discovered in Libav 12.3. A read access violation in the in_table_init16 function in libavcodec/aacsbr.c allows remote attackers to cause a denial of service (application crash), as demonstrated by avconv.
https://docs.google.com/document/d/16_HC-FjFuBNMbaoR397z_3EwpDP6wb1DNWrfkD4qRDE/edit