218, 1/11 ȸ¿ø°¡ÀÔ  ·Î±×ÀΠ 
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   http://cyworld.co.kr/codesire
   [°øÁö] GATE1 ¼­¹ö°¡ ¿Ï¼ºµÇ¾ú½À´Ï´Ù.

http://www.hackerschool.org/HS_Boards/zboard.php?id=bof_fellowship&no=86 [º¹»ç]


[¸÷ ¸®½ºÆ®]
LEVEL1 (gate -> gremlin) :  simple bof
LEVEL2 (gremlin -> cobolt) : small buffer
LEVEL3 (cobolt -> goblin) : small buffer + stdin
LEVEL4 (goblin -> orc) : egghunter
LEVEL5 (orc -> wolfman) : egghunter + bufferhunter
LEVEL6 (wolfman -> darkelf) : check length of argv[1] + egghunter + bufferhunter
LEVEL7 (darkelf -> orge) : check argv[0]
LEVEL8 (orge -> troll) : check argc
LEVEL9 (troll -> vampire) : check 0xbfff
LEVEL10 (vampire -> skeleton) : argv hunter
LEVEL11 (skeleton -> golem) : stack destroyer
LEVEL12 (golem -> darkknight) : sfp
LEVEL13 (darkknight -> bugbear) : RTL1
LEVEL14 (bugbear -> giant) : RTL2, only execve
LEVEL15 (giant -> assassin) : no stack, no RTL
LEVEL16 (assassin -> zombie_assassin) : fake ebp
LEVEL17 (zombie_assassin -> succubus) : function calls
LEVEL18 (succubus -> nightmare) : plt
LEVEL19 (nightmare -> xavis) : fgets + destroyers
LEVEL20 (xavis -> death_knight) : remote BOF


ÀÌ·¸°Ô Çؼ­ ÃÑ 20¸¶¸®ÀÇ ¸ó½ºÅ͵éÀÌ GATE1 ¼­¹ö¿¡ ¹èÄ¡µÇ¾ú½À´Ï´Ù.

LEVEL20±îÁö ¸ðµÎ ÀâÀ¸½Å ºÐµé²´ º»ÀÎ IDÀÇ ±ÇÇÑÀ» »ó½Â½ÃÄÑ µå¸³´Ï´Ù.

±ÇÇÑÀÌ »ó½ÂµÇ¸é ÀÌ °Ô½ÃÆÇÀÇ ¸ðµç ºñ¹Ð ±ÛµéÀ» º¼ ¼ö ÀÖ½À´Ï´Ù.

±×¸®°í GATE2·Î ÁøÀÔÇÒ ¼ö ÀÖ´Â °Ô½ÃÆÇ ÁÖ¼Ò¸¦ ¾Ë·Áµå¸³´Ï´Ù.
(¸çÄ¥ Àü¿¡ LEVEL15±îÁö Ç®¸é ÁÖ¼Ò¸¦ ¾Ë·Áµå¸°´Ù°í Çß¾ú´Âµ¥ LEVEL20À¸·Î Á¤Á¤ÇÕ´Ï´Ù.)

GATE2¿¡¼± ´õ ÀÌ»ó RedhatÀÌ ¾Æ´Ñ, Fedora ȯ°æ¿¡¼­ ¹®Á¦¸¦ Ç®¾î ³ª°¡°Ô µË´Ï´Ù.

LEVEL20À» Á¡·ÉÇϽŠºÐÀº death_knight µð·ºÅ丮¿¡ ¶³±ÅÁø ¾ÆÀÌÅÛÀ» º¹»çÇؼ­

°Ô½ÃÆÇ¿¡ ºñ¹Ð ±Û·Î ºÙ¿©³Ö±â ÇØÁֽøé Á¦°¡ ´ñ±Û·Î GATE2ÀÇ ÁÖ¼Ò¸¦ ¾Ë·Áµå¸³´Ï´Ù.


  Hit : 2803     Date : 2010/03/30 03:43



    
CodeAche ¿À¿ì +_+
ÁÖ¼Ò´Â ¾ðÁ¦°ø°³µÇ³ª¿ä +_+
2010/03/30  
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buff3r ¿À¿Ê !! Fedora !!! XD 2010/03/31  
     [°øÁö] Welcome to the Fedora Castle !! (´Ù Ǫ½Å ºÐ¸¸ ºÁÁÖ¼¼¿ä) [5] ¸Û¸Û 04/13 8783
     [°øÁö] ±âº» ·ê [3] ¸Û¸Û 02/26 5002
216   level1~3 Ç®ÀÌ ¸ðÀ½[2]     ¸Û¸Û
02/26 4068
215   argv0¿¡ ½©Äڵ带 ³Ö±âÀ§ÇÏ¿© ½Éº¼¸¯¸µÅ©¸¦ ÇÏ·Á´Âµ¥.. ¾ÈµÇ³×¿ä... ¿Ö ¾ÈµÇ´ÂÁö ¾Ë·ÁÁÖ¼¼¿ä~[13]     ¸Ó¤¾
05/28 3806
214   Åä¿äÀÏ¿¡ ½©ÄÚµå ¸¸µé±â °­Á µéÀ¸½Ç ºÐ~?[12]     ¸Û¸Û
03/06 3788
213   ½©ÄÚµå ¸¸µé±â °­ÀÇ PPT¿Í ¿¹Á¦ÀÔ´Ï´Ù[2]     ¸Û¸Û
03/08 3769
212   LEVEL1(gremlin) - ÀϹÝÀûÀÎ BOF     ¸Û¸Û
02/26 3579
211   argv[2]...[3]     µÎ·ç¹¶¼ú
06/05 3469
210   ·¹º§1~3 Ç®ÀÌ     HEx0D
02/26 3236
209   ¸ó½ºÅÍ ¼­¿­     ¸Û¸Û
02/26 3133
208   LOB Redhat6 (VmÀ̹ÌÁö)°¡ ºÎÆÃÀÌ ¾ÈµË´Ï´Ù     everpall
04/26 3000
207   Æäµµ¶ó¼º ÀÔÀå±Ç ÁÖ¼¼¿ä ¤Ð¤Ð[1]     prudentiae
11/16 2955
206   level4 (goblin) µµÀúÈ÷ Ç®¸®Áö°¡¾Ê½À´Ï´Ù;...[1]     94cyan
05/13 2860
  [°øÁö] GATE1 ¼­¹ö°¡ ¿Ï¼ºµÇ¾ú½À´Ï´Ù.[3]     ¸Û¸Û
03/30 2802
204   ·¹º§ 6, 7 Ãß°¡!     ¸Û¸Û
02/27 2725
203   level 4, 5 Ãß°¡![7]     ¸Û¸Û
02/26 2725
202   ¸ó½ºÅÍ ¸ñ·Ï[2]     ¸Û¸Û
03/08 2721
201   ¾ÆÁ÷ Àú·¾ ¸÷¿¡¼­ Çì¸Å½Ã´Â ºÐµé~     ¸Û¸Û
03/08 2698
200   [°øÁö] ·¹º§15±îÁö Á¡·ÉÇϽŠºÐ²²´Â[3]     ¸Û¸Û
03/24 2645
199   ¿ìÀ¡ Å䳪¿Â´Ù     kangms0801
02/27 2638
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