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

Probably uncomplicated insects could have drastic results, permitting attackers to compromise structures, improve neighborhood privileges, and another way wreak havoc on a system.A trojan horse Hunter's Diary follows defense specialist Tobias Klein as he tracks down and exploits insects in the various world's preferred software program, like Apple's iOS, the VLC media participant, internet browsers, or even the Mac OS X kernel. during this extraordinary account, you'll see how the builders answerable for those flaws patched the bugs—or did not reply in any respect. As you persist with Klein on his trip, you'll achieve deep technical wisdom and perception into how hackers strategy tricky difficulties and adventure the real joys (and frustrations) of computer virus hunting.

Along the best way you'll find out how to:
• Use field-tested concepts to discover insects, like deciding upon and tracing consumer enter info and opposite engineering
• make the most vulnerabilities like NULL pointer dereferences, buffer overflows, and sort conversion flaws
• enhance evidence of suggestion code that verifies the safety flaw
• file insects to proprietors or 3rd celebration brokers

A trojan horse Hunter's Diary is choked with real-world examples of weak code and the customized courses used to discover and attempt insects. no matter if you're looking insects for enjoyable, for revenue, or to make the area a more secure position, you'll study important new talents through taking a look over the shoulder of a pro malicious program hunter in action.

"This is among the finest infosec books to come back out within the final numerous years."
Dino Dai Zovi, info safety 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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Additional info for A Bug Hunter's Diary: A Guided Tour Through the Wilds of Software Security

Sample text

Figure 3-4 shows a call graph summarizing the relationships of the functions involved in the NULL pointer dereference bug. (1) ip_process_ioctl() (5) (2) ip_extract_tunreq() (4) ipif_lookup_on_name() (3) ip_sioctl_tunparam() (6) NULL Pointer Dereference Figure 3-4: Call graph summarizing the relationships of the functions involved in the NULL pointer dereference bug. The numbers shown refer to the chronological order of events. 2 Exploitation Exploiting this bug was an exciting challenge. 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.

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). ] /* * Null terminate the string to protect against buffer * overrun. String was generated by user code and may not * be trusted. */ ta->ifta_lifr_name[LIFNAMSIZ - 1] = '\0'; connp = Q_TO_CONN(q); isv6 = connp->conn_af_isv6; ipst = connp->conn_netstack->netstack_ip; /* Disallows implicit create */ ipif = ipif_lookup_on_name(ta->ifta_lifr_name, mi_strlen(ta->ifta_lifr_name), B_FALSE, &exists, isv6, connp->conn_zoneid, CONNP_TO_WQ(connp), mp, func, &error, ipst); In line 8178, a linked STREAMS message block is referenced, and on line 8179, the structure ta is filled with the user-controlled IOCTL data.

Fd = open ("/dev/arp", O_RDWR); if (fd < printf fflush perror return } 0) { ("failed\n"); (0); ("[-] ERROR: open"); 1; printf ("OK\n"); //////////////////////////////////////////////// // Map the zero page printf ("[+] Trying to map zero page .. c) used to gain control of EIP/RIP and thereby achieve arbitrary code execution at the kernel. In line 19 of Listing 3-2, the zero page is mapped using mmap(). But the most interesting part of the POC code is the layout of the zero page data (see lines 32–63).

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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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