Download e-book for kindle: A Bug Hunter's Diary: A Guided Tour Through the Wilds of by Tobias Klein

By Tobias Klein

ISBN-10: 1593273851

ISBN-13: 9781593273859

Likely basic insects may have drastic results, permitting attackers to compromise structures, strengthen neighborhood privileges, and another way wreak havoc on a system.A malicious program Hunter's Diary follows protection professional Tobias Klein as he tracks down and exploits insects in many of the 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 liable for those flaws patched the bugs—or didn't reply in any respect. As you keep on with Klein on his trip, you'll achieve deep technical wisdom and perception into how hackers technique tricky difficulties and event the genuine joys (and frustrations) of computer virus hunting.

Along the way in which you'll find out how to:
• Use field-tested suggestions to discover insects, like opting for and tracing person enter facts and opposite engineering
• make the most vulnerabilities like NULL pointer dereferences, buffer overflows, and sort conversion flaws
• increase evidence of thought code that verifies the protection flaw
• file insects to owners or 3rd occasion brokers

A trojan horse Hunter's Diary is full of real-world examples of susceptible code and the customized courses used to discover and try out insects. even if you're searching insects for enjoyable, for revenue, or to make the area a more secure position, you'll research helpful new talents through having a look over the shoulder of a pro malicious program hunter in action.

"This is likely one of the finest infosec books to come back out within the final a number of years."
Dino Dai Zovi, info defense Professional

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

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

Sample text

C. b[1], srcaddr, mDNSVal16(srcport), dstaddr, mDNSVal16(dstport), InterfaceID); } // Packet reception often causes a change to the task list: // 1. indd 45 1/25/09 4:39:45 PM 46 Part I ■ Mac OS X Basics // 2. Conflicing response packets received from other hosts can cause us to need to send defensive responses // 3. Other hosts announcing deletion of shared records can cause us to need to re-assert those records // 4. Response packets that answer questions may cause our client to issue new questions mDNS_Unlock(m); } The raw data from the network enters this function in the pkt variable.

A universal binary can support multiple architectures in the same file. For Mac OS X, this is usually PowerPC and x86. indd 13 1/25/09 4:39:28 PM 14 Part I ■ Mac OS X Basics Each universal binary has the code necessary to run on any of the architectures it supports. The same exact ls binary from the code example can run on a Mac with an x86 processor or a PowerPC processor. 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.

Indd 28 1/25/09 4:39:28 PM Chapter 1 ■ Mac OS X Architecture 29 The stack-check failure handler, __stack_chk_fail(), calls syslog syslog(“error %s”, argv[0]);. We have overwritten the argv[0] pointer with our own value. This does not appear to be exploitable, but unexpected behavior in the stack-check failure handler is not a good sign. Firewall Theoretically, Leopard offers important security improvements in the form of its firewall. In Tiger the firewall was based on ipfw (IP firewall), the BSD firewall.

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

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