This indicates an man-in-the-middle (MITM) attack attempt to exploit the vulnerability in Apple products.
The vulnerability is due to a logic error in Apple iOS ,Apple TV and Apple OS X when vulnerable module checking the signature in a TLS Server Key Exchange message.
Apple iOS 6.x Prior to 6.1.6
Apple iOS 7.x Prior to 7.0.6
Apple TV Prior to 6.0.2
Apple OS X Prior to 10.9.2
unauthorized data modification
Apply the most recent upgrade or patch from the vendor.