By Charlie Miller, Dino Dai Zovi
Booklet (2011) ISBN: 9780470481479
LC: QA76.76.O63 M558 2009
As an increasing number of vulnerabilities are present in the Mac OS X (Leopard) working approach, protection researchers are understanding the significance of constructing proof-of-concept exploits for these vulnerabilities. This distinct tome is the 1st e-book to discover the issues within the Mac OS X working system--and the way to take care of them. Written by means of white hat hackers, this e-book is geared toward making important details recognized that you can locate how one can safe your Mac OS X structures, and examines the kinds of assaults which are avoided by way of Leopard's defense defenses, what assaults aren't, and the way to most sensible deal with these weaknesses.
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Additional resources for The Mac Hacker's Handbook
C 2 architectures Mach-O executable ppc Mach-O executable i386 To see the file-size difference, compare this binary to the single-architecture version: -rwxr-xr-x -rwxr-xr-x 1 user1 1 user1 user1 user1 12564 May 28948 May 1 12:55 test 1 12:54 test-universal Mach-O File Format This file format supports both statically and dynamically linked executables. The basic structure contains three regions: the header, the load commands, and the actual data. The header contains basic information about the file, such as magic bytes to identify it as a Mach-O file and information about the target architecture.
There is also wide-area Bonjour that involves making Bonjour-like changes to a DNS server. indd 35 1/25/09 4:39:44 PM 36 Part I ■ Mac OS X Basics The Internet Engineering Task Force (IETF) Zero Configuration Networking Working Group specifies three requirements for Zero Configuration Networking, such as Bonjour provides. ■ Must be able to obtain an IP Address (even without a DHCP server) ■ Must be able to do name-to-address translation (even without a DNS server) ■ Must be able to discover services on the network Get an IP Address The fi rst requirement is met via RFC 3927, Dynamic Configuration of IPv4 Link-Local Addresses (or RFC 2496 for IPv6).
The obvious drawback is file size, of course. The gcc compiler in Mac OS X emits Mach-O-format binaries by default. To build a universal binary, one additional flag must be passed to specify the target architectures desired. In the following example, a universal binary for the x86 and PowerPC architectures is created. c 2 architectures Mach-O executable ppc Mach-O executable i386 To see the file-size difference, compare this binary to the single-architecture version: -rwxr-xr-x -rwxr-xr-x 1 user1 1 user1 user1 user1 12564 May 28948 May 1 12:55 test 1 12:54 test-universal Mach-O File Format This file format supports both statically and dynamically linked executables.