Off-by-one error in Telephony in Apple iOS before 6 allows remote attackers to cause a denial of service (buffer overflow and connectivity outage) via a crafted user-data header in an SMS message.

Mail in Apple iOS before 6 does not properly implement the Data Protection feature for e-mail attachments, which allows physically proximate attackers to bypass an intended passcode requirement via unspecified vectors.

Mail in Apple iOS before 6 uses an S/MIME message's From address as the displayed sender address, which allows remote attackers to spoof signed content via an e-mail message in which the From field does not match the signer's identity.

CFNetwork in Apple iOS before 6 does not properly identify the host portion of a URL, which allows remote attackers to obtain sensitive information by leveraging the construction of an HTTP request with an incorrect hostname derived from a malformed URL.

The kernel in Apple iOS before 6 dereferences invalid pointers during the handling of packet-filter data structures, which allows local users to gain privileges via a crafted program that makes packet-filter ioctl calls.

Office Viewer in Apple iOS before 6 writes cleartext document data to a temporary file, which might allow local users to bypass a document's intended (1) Data Protection level or (2) encryption state by reading the temporary content.

The Restrictions (aka Parental Controls) implementation in Apple iOS before 6 does not properly handle purchase attempts after a Disable Restrictions action, which allows local users to bypass an intended Apple ID authentication step via an app that performs purchase transactions.

Telephony in Apple iOS before 6 uses an SMS message's return address as the displayed sender address, which allows remote attackers to spoof text communication via a message in which the return address does not match the originating address.

The Passcode Lock implementation in Apple iOS before 6 allows physically proximate attackers to bypass an intended passcode requirement via vectors related to ending a FaceTime call.

The Passcode Lock implementation in Apple iOS before 6 allows physically proximate attackers to bypass an intended passcode requirement via vectors involving use of the camera.