About the security content of Apple TV 5.2.1
Apple TV
Available for: Apple TV 2nd generation and later
Impact: A local user may be able to execute unsigned code
Description: A state management issue existed in the handling of Mach-O executable files with overlapping segments. This issue was addressed by refusing to load an executable with overlapping segments.
CVE-ID
CVE-2013-0977 : evad3rs