Download Hacking and Securing iOS Applications: Stealing Data, by Jonathan Zdziarski PDF

By Jonathan Zdziarski

If you’re an app developer with a superior origin in Objective-C, this ebook is an absolute must—chances are very excessive that your company’s iOS functions are at risk of assault. That’s simply because malicious attackers now use an arsenal of instruments to reverse-engineer, hint, and manage purposes in ways in which so much programmers aren’t acutely aware of.

This consultant illustrates different types of iOS assaults, in addition to the instruments and strategies that hackers use. You’ll examine top practices to aid guard your purposes, and notice how vital it truly is to appreciate and strategize like your adversary.

* learn refined vulnerabilities in real-world applications—and steer clear of a similar difficulties on your apps
* find out how attackers infect apps with malware via code injection
* realize how attackers defeat iOS keychain and data-protection encryption
* Use a debugger and customized code injection to control the runtime Objective-C setting
* hinder attackers from hijacking SSL classes and stealing site visitors
* Securely delete documents and layout your apps to avoid forensic information leakage
* stay away from debugging abuse, validate the integrity of run-time sessions, and make your code tougher to track

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Additional info for Hacking and Securing iOS Applications: Stealing Data, Hijacking Software, and How to Prevent It

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By the time the launchd program is run, the device’s kernel will have already been booted by redsn0w or whatever tool you are using. In the case of redsn0w, the kernel will be booted after being patched in memory to disable Apple signing security, which will allow you to run your self-signed launchd program in place of Apple’s. ” program onto the device from a directory on the RAM disk. In the following section, we’ll dissect this code. Example 2-5. = 0) { puts("unable to mount devfs. \n"); 44 | Chapter 2: The Basics of Compromising iOS r = fsexec(fsck_hfs, env, 1); if (r) { puts("unable to check root filesystem.

If the weak symbol is linked and the symbol is not defined anywhere else, the value of the weak symbol becomes zero (when marked with a V) or system-defined (when marked with a W) and no error occurs. Compromising Devices and Injecting Code | 31 String searches You may also choose to perform a strings dump of your binary. A strings dump finds the printable strings in a binary file. This can be helpful in finding resources compiled into applications, such as website URLs and query strings, hardcoded passwords, and other information compiled directly into a binary.

Within one second after the screen goes dark, begin the DFU mode key sequence: immediately press the Home and Power buttons together for 10 seconds, then release the Power button and continue holding the Home button for another 10 seconds. 4. Confirm the device is in DFU mode either by using System Profiler or by allowing redsn0w to auto-detect the device. End User Jailbreaks | 25 Powering off the device accomplishes two things that allow the jailbreak to work. First, the filesystem is cleanly dismounted, so that a filesystem check does not need to take place when the device boots.

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