Apple iPhone OS 4.3.4

The Data Security component in Apple iOS before 4.2.10 and 4.3.x before 4.3.5 does not check the basicConstraints parameter during validation of X.509 certificate chains, which allows man-in-the-middle attackers to spoof an SSL server by using a non-CA certificate to sign a certificate for an arbitrary domain.

The kernel in Apple iOS before 5.0.1 does not ensure the validity of flag combinations for an mmap system call, which allows local users to execute arbitrary unsigned code via a crafted app.

libinfo in Apple iOS before 5.0.1 does not properly formulate domain-name queries, which allows remote attackers to obtain sensitive information via a crafted DNS hostname.

Cross-site scripting (XSS) vulnerability in Calendar in Apple iOS before 5 allows remote attackers to inject arbitrary web script or HTML via an invitation note.

The Passcode Lock feature in Apple iOS before 5.0.1 on the iPad 2 does not properly implement the locked state, which allows physically proximate attackers to access data by opening a Smart Cover during power-off confirmation.