The extensions APIs in the kernel in Apple iOS before 6.0.1 provide kernel addresses in responses that contain an OSBundleMachOHeaders key, which makes it easier for remote attackers to bypass the ASLR protection mechanism via a crafted app.

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.