CVE-2017-9994: Improper Restriction of Operations within the Bounds of a Memory Buffer

libavcodec/webp.c in FFmpeg before 2.8.12, 3.0.x before 3.0.8, 3.1.x before 3.1.8, 3.2.x before 3.2.5, and 3.3.x before 3.3.1 does not ensure that pixfmt is set, which allows remote attackers to cause a denial of service heap-based buffer overflow and application crash or possibly have unspecifie...