iMessage - Decoding NSSharedKeyDictionary can read ObjC Object at Attacker Controlled Address

During processing of incoming iMessages, attacker controlled data is deserialized using the NSUnarchiver API. One of the classes that is allowed to be decoded from the incoming data is NSDictionary. However, due to the logic of NSUnarchiver, all subclasses of NSDictionary that also implement secu...

iMessage - Decoding NSSharedKeyDictionary Can Read Object Out of Bounds

When an NSKeyedUnarchiver decodes an object, it first allocates the object using allocWithZone, and then puts the object into a dictionary for temporary objects. It then calls the appropriate initWithCoder: on the allocated object. If initWithCoder: or any method it calls decodes the same object,...

iMessage - Decoding NSSharedKeyDictionary Can Read Object Out of Bounds

iMessage - Decoding NSSharedKeyDictionary Can Read Object Out of Bounds When an NSKeyedUnarchiver decodes an object, it first allocates the object using allocWithZone, and then puts the object into a dictionary for temporary objects. It then calls the appropriate initWithCoder: on the allocated...

NSKeyedUnarchiver - Info Leak in Decoding SGBigUTF8String

NSKeyedUnarchiver - Info Leak in Decoding SGBigUTF8String There is an info leak when decoding the SGBigUTF8String class using SGBigUTF8String initWithCoder:. This class initializes the string using SGBigUTF8String initWithUTF8DataNullTerminated: even though there is no guarantee the bytes provide...

Apple iOS / OS X NSKeyedArchiver Memory Corruption(CVE-2017-2527)

CAMediaTimingFunctionBuiltin is a class in QuartzCore. Its initWithCoder: method reads an Int "index" then passes that to builtinfunction mov ebx, edi -- controlled unsigned int mov r14d, ebx lea r15, ZL9functions0 ; functions mov rax, r15+r148 if rax is non-null it's returned as an objective-c...

Apple iOS / MacOS NSKeyedArchiver Heap Corruption(CVE-2017-2524)

Using lldb inside a simple helloworld app for iOS we can see that there are over 600 classes which we could get deserialized for persistance for example. The TextInput framework which is loaded has a class TIKeyboardLayout. The initWithCoder: implementation has this code: this is the x86 code, th...

Apple iOS / macOS - NSKeyedArchiver Memory Corruption Due to Lack of Bounds Checking in CAMediaTimin

Exploit for multiple platform in category dos / poc Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1175 CAMediaTimingFunctionBuiltin is a class in QuartzCore. Its initWithCoder: method reads an Int "index" then passes that to builtinfunction mov ebx, edi -- controlled unsigned...