By Tobias Klein
Likely easy insects could have drastic results, permitting attackers to compromise platforms, strengthen neighborhood privileges, and differently wreak havoc on a system.A trojan horse Hunter's Diary follows protection professional Tobias Klein as he tracks down and exploits insects in a few of the world's preferred software program, like Apple's iOS, the VLC media participant, net browsers, or even the Mac OS X kernel. during this distinctive account, you'll see how the builders liable for those flaws patched the bugs—or didn't reply in any respect. As you stick to Klein on his trip, you'll achieve deep technical wisdom and perception into how hackers technique tough difficulties and adventure the genuine joys (and frustrations) of trojan horse hunting.
Along the way in which you'll find out how to:
• Use field-tested ideas to discover insects, like selecting and tracing consumer enter facts and opposite engineering
• make the most vulnerabilities like NULL pointer dereferences, buffer overflows, and kind conversion flaws
• boost evidence of suggestion code that verifies the protection flaw
• file insects to proprietors or 3rd celebration brokers
A malicious program Hunter's Diary is jam-packed with real-world examples of weak code and the customized courses used to discover and try insects. even if you're looking insects for enjoyable, for revenue, or to make the realm a more secure position, you'll examine worthy new abilities via taking a look over the shoulder of a pro trojan horse hunter in action.
"This is without doubt one of the finest infosec books to come back out within the final numerous years."
–Dino Dai Zovi, details defense Professional
"Give a guy an make the most and also you make him a hacker for an afternoon; train a guy to take advantage of insects and also you make him a hacker for a lifetime."
–Felix 'FX' Lindner
Read or Download A Bug Hunter's Diary: A Guided Tour Through the Wilds of Software Security PDF
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Additional info for A Bug Hunter's Diary: A Guided Tour Through the Wilds of Software Security
But this bug is different from the average user space NULL pointer dereferences, and it’s possible to exploit this vulnerability to execute arbitrary code. The vulnerability affects the FFmpeg multimedia library that is used by many popular software projects, including Google Chrome, VLC media player, MPlayer, and Xine to name just a few. 1 ← There ar e other exam ples of exploi user space NU table LL pointer de references. html).
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. = NULL) *error = EINVAL; return (NULL); } Chapter 3 To fix the bug, Sun introduced the new error definition in lines 19180 and 19181 of ipif_lookup_on_name().
As usual, I searched the code for input data and then traced that data while looking for coding errors. After a few hours, I found the vulnerability. ] 26735 case TUN_CMD: 26736 /* 26737 * SIOC[GS]TUNPARAM appear here. ] When a SIOCGTUNPARAM IOCTL request is sent to the kernel, the function ip_process_ioctl() is called. ci_ ipif is explicitly set to NULL. Because of the SIOCGTUNPARAM IOCTL call, the switch case TUN_CMD is chosen (see line 26735), and the function ip_extract_tunreq() is called (see line 26740).