Apple iTunes before 10.5.1 does not properly verify the authenticity of updates, which allows man-in-the-middle attackers to execute arbitrary code via a Trojan horse update, as demonstrated by evilgrade and DNS cache poisoning.

Integer overflow in Apple QuickTime Player 7.0.3 and 7.0.4 and iTunes 6.0.1 and 6.0.2 allows remote attackers to execute arbitrary code via a FlashPix (FPX) image that contains a field that specifies a large number of blocks.