Apple iTunes before 8.0 on Mac OS X 10.4.11, when iTunes Music Sharing is enabled but blocked by the host-based firewall, presents misleading information about firewall security, which might allow remote attackers to leverage an exposure that would be absent if the administrator were given better information.
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.
Heap-based buffer overflow in Apple iTunes before 7.4 allows remote attackers to cause a denial of service (application crash) or execute arbitrary code via crafted album cover art in the covr atom of an MP4/AAC file.