Download A Bug Hunter's Diary: A Guided Tour Through the Wilds of by Tobias Klein PDF

By Tobias Klein

Doubtless uncomplicated insects could have drastic effects, permitting attackers to compromise structures, expand neighborhood privileges, and another way wreak havoc on a system.A trojan horse Hunter's Diary follows safety professional Tobias Klein as he tracks down and exploits insects in the various world's hottest software program, like Apple's iOS, the VLC media participant, internet browsers, or even the Mac OS X kernel. during this exceptional account, you'll see how the builders chargeable for those flaws patched the bugs—or didn't reply in any respect. As you persist with Klein on his trip, you'll achieve deep technical wisdom and perception into how hackers method tough difficulties and event the real joys (and frustrations) of trojan horse hunting.

Along the way in which you'll find out how to:
• Use field-tested thoughts to discover insects, like picking out and tracing person enter information and opposite engineering
• make the most vulnerabilities like NULL pointer dereferences, buffer overflows, and sort conversion flaws
• strengthen facts of idea code that verifies the protection flaw
• record insects to proprietors or 3rd social gathering brokers

A trojan horse Hunter's Diary is filled with real-world examples of weak code and the customized courses used to discover and try insects. no matter if you're searching insects for enjoyable, for revenue, or to make the realm a more secure position, you'll examine worthy new abilities through having a look over the shoulder of a pro malicious program hunter in action.

"This is among the best infosec books to come back out within the final numerous years."
Dino Dai Zovi, info defense Professional

"Give a guy an make the most and also you make him a hacker for an afternoon; train a guy to use insects and also you make him a hacker for a lifetime."
Felix 'FX' Lindner

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Additional info for A Bug Hunter's Diary: A Guided Tour Through the Wilds of Software Security

Sample text

NULL pointer dereferences are usually labeled as unexploitable bugs because they can generally be used for a denial-of-service attack but not for arbitrary code execution. However, this NULL pointer dereference is different, as it can be successfully exploited for arbitrary code execution at the kernel level. iso), 10 s ari Sol is called 9. Generic_137138-0 1. Trigger the NULL pointer dereference for a denial of service. 2. Use the zero page to get control over EIP/RIP. Step 1: Trigger the NULL Pointer Dereference for a Denial of Service To trigger the NULL pointer dereference, I wrote the following proofof-concept (POC) code (see Listing 3-1).

Because of the strict laws in my home country, I am not allowed to provide you with a full working exploit. ] 48 if (*cp == IPIF_SEPARATOR_CHAR) { /* * Reject any non-decimal aliases for logical * interfaces. Aliases with leading zeroes * are also rejected as they introduce ambiguity * in the naming of the interfaces. * In order to confirm with existing semantics, * and to not break any programs/script relying * on that behaviour, if<0>:0 is considered to be * a valid interface. * * If alias has two or more digits and the first * is zero, fail.

19161 if (*cp == IPIF_SEPARATOR_CHAR) { 19162 /* 19163 * Reject any non-decimal aliases for logical 19164 * interfaces. ] * are also rejected as they introduce ambiguity * in the naming of the interfaces. * In order to confirm with existing semantics, * and to not break any programs/script relying * on that behaviour, if<0>:0 is considered to be * a valid interface. * * If alias has two or more digits and the first * is zero, fail. */ if (&cp[2] < endp && cp[1] == '0') return (NULL); } In line 19139, the value of error, which holds one of the error conditions, is explicitly set to 0.

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