About the security content of iOS 6.1.3

Summary

This document describes the security content of iOS 6.1.3.

Products Affected

Product Security

For the protection of our customers, Apple does not disclose, discuss, or confirm security issues until a full investigation has occurred and any necessary patches or releases are available. To learn more about Apple Product Security, see the Apple Product Security website.
For information about the Apple Product Security PGP Key, see "How to use the Apple Product Security PGP Key."
Where possible, CVE IDs are used to reference the vulnerabilities for further information.
To learn about other Security Updates, see "Apple Security Updates".

iOS 6.1.3

• dyld
  Available for: iPhone 3GS and later, iPod touch (4th generation) and later, iPad 2 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
  

• Kernel
  Available for: iPhone 3GS and later, iPod touch (4th generation) and later, iPad 2 and later
  Impact: A local user may be able to determine the address of structures in the kernel
  Description: An information disclosure issue existed in the ARM prefetch abort handler. This issue was addressed by panicking if the prefetch abort handler is not being called from an abort context.
  CVE-ID
  CVE-2013-0978 : evad3rs
  

• Lockdown
  Available for: iPhone 3GS and later, iPod touch (4th generation) and later, iPad 2 and later
  Impact: A local user may be able to change permissions on arbitrary files
  Description: When restoring from backup, lockdownd changed permissions on certain files even if the path to the file included a symbolic link. This issue was addressed by not changing permissions on any file with a symlink in its path.
  CVE-ID
  CVE-2013-0979 : evad3rs
  

• Passcode Lock
  Available for: iPhone 3GS and later, iPod touch (4th generation) and later, iPad 2 and later
  Impact: A person with physical access to the device may be able to bypass the screen lock
  Description: A logic issue existed in the handling of emergency calls from the lock screen. This issue was addressed through improved lock state management.
  CVE-ID
  CVE-2013-0980 : Christopher Heffley of theMedium.ca, videosdebarraquito
  

• USB
  Available for: iPhone 3GS and later, iPod touch (4th generation) and later, iPad 2 and later
  Impact: A local user may be able to execute arbitrary code in the kernel
  Description: The IOUSBDeviceFamily driver used pipe object pointers that came from userspace. This issue was addressed by performing additional validation of pipe object pointers.
  CVE-ID
  CVE-2013-0981 : evad3rs
  

• WebKit
  Available for: iPhone 3GS and later, iPod touch (4th generation) and later, iPad 2 and later
  Impact: Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution
  Description: An invalid cast issue existed in the handling of SVG files. This issue was addressed through improved type checking.
  CVE-ID
  CVE-2013-0912 : Nils and Jon from MWR Labs working with HP TippingPoint's Zero Day Initiative
  

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- wong chee tat :)