FFmpeg through 9.0.2 contains an information disclosure vulnerability in vp8_lossy_decode_alpha() in libavcodec/webp.c that leaves alpha plane memory uninitialized for short uncompressed ALPH chunks. Attackers can supply a crafted WebP image whose ALPH chunk is shorter than width * height to disclose stale pixel data from previously decoded frames.

FFmpeg through 9.0.2 contains an information disclosure vulnerability in vp8_lossy_decode_alpha() in libavcodec/webp.c that leaves alpha plane memory uninitialized for short uncompressed ALPH chunks. Attackers can supply a crafted WebP image whose ALPH chunk is shorter than width * height to disclose stale pixel data from previously decoded frames.

Ein Angreifer kann mehrere Schwachstellen in ffmpeg ausnutzen, um einen Denial-of-Service-Zustand auszulösen, Daten zu manipulieren oder offenzulegen, Sicherheitsmaßnahmen zu umgehen, Speicherbeschädigungen zu verursachen und möglicherweise beliebigen Code auszuführen.