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   쉡ÄÚµå Á¦ÀÛ°ü·Ã Áú¹®ÀÔ´Ï´Ù.

http://www.hackerschool.org/HS_Boards/zboard.php?id=QNA_system&no=329 [º¹»ç]


main()
{
        int *ret;
        ret = (int *)&ret + 2;
        (*ret) = (int)shellcode;
}

¿©±â¿¡¼­¿ä +2¸¦ ÇØÁÖ´Â ÀÌÀ¯°¡ ±Ã±ÝÇÕ´Ï´Ù.

±×´Ï±ñ
========
¸®ÅÏÁÖ¼Ò
========
ebp(4¹ÙÀÌÆ®)
========
ret(À§¿¡¼­ ÁöÁ¤ÇѺ¯¼ö)


ÀÌ·¸°Ô ½ºÅØ¿¡ ÀúÀåµÇ¾î ÀÖÀ»Å×´Ï +8ÀÌ ¸Â´Â°Ô ¾Æ´Ñ°¡¿ä?
Èì Ȥ½Ã (int *)&ret + 2;  ¿©±â¼­  &ret°¡ ÁÖ¼ÒÀ̴ϱñ ÁÖ¼ÒÀÇ 4¹ÙÀÌÆ® ´ÜÀ§¿¡ ¸ÂÃ߾´õÇØÁö´Ï±ñ ±×·±°Ç°¡¿ä?(¤»¤» c¾ð¾î °øºÎ¸¦ ¿À·¡Àü¿¡ ÇØ¼­ °¡¹°)
Áï +2°¡ 4¹ÙÀÌÆ® ´ÜÀ§·ÎÇØ¼­ +8¹ÙÀÌÆ®¸¦ ¶æÇϴ°ǰ¡¿ä?

  Hit : 4992     Date : 2004/11/08 09:33



    
fool3 intÇü Æ÷ÀÎÅÍ´Â 4¹ÙÀÌÆ®¸¦ °¡¸®Å°±â ¶§¹®¿¡ 2004/11/11  
fool3 ¸¸ÀÏ char* ¸¦ »ç¿ëÇϸé +8ÀÌ ¸Â°ÚÁÒ. ¹°·Ð char ÇüÀÌ ÇÑ ¹ÙÀÌÆ®¸¸ ´ãÀ» ¼ö À־ 2004/11/11  
fool3 ÁÖ¼Ò °ªÀ» °¡Áú ¼ö ¾øÁö¸¸ 2004/11/11  
indra <a href=http://indra.linuxstudy.pe.kr/mydata/hmmm.txt target=_blank>http://indra.linuxstudy.pe.kr/mydata/hmmm.txt</a> 2004/11/16
1576   ¹ö±×¹Ù¿îƼ¸¦ ÇÒ Á¤µµÀÇ ¼öÁØÀÌ¸é ¾î¶»°Ô ·Îµå¸ÊÀ» Àâ¾Æ¾ß Çϳª¿ä?     ÇØÅ·ÀßÇϰí½Í´Ù
05/03 1307
1575   LOB ¹®Á¦ ÀͽºÇ÷ÎÀÕÀ» C·Î ÀÛ¼ºÇϸ鼭 Ǫ´Âµ¥¿ä.[2]     ÇØÅ·ÀßÇϰí½Í´Ù
09/18 1577
1574   pwnable.kr echo1 Áú¹®2 (½ºÆ÷ ÁÖÀÇ)[2]     turttle2s
10/05 2684
1573   LOB GATE¹®Á¦ Ç®¸é¼­ ±Ã±ÝÇÑÁ¡[3]     hackxx123
08/24 2313
1572   libc°ü·Ã - 2[5]     lMaxl04
08/24 2287
1571   ASLRÀÌ °É·ÁÀÖÀ»¶§ ret¿¡ ROPÀ¸·Î jmp %espÀ» »ç¿ëÇÑ °æ¿ì.[3]     lMaxl04
06/29 2476
1570   ¸®¸ðÆ® ȯ°æ¿¡¼­ÀÇ ½ºÅà ÁÖ¼Ò È®ÀÎ ¹æ¹ýÀÌ ±Ã±ÝÇÕ´Ï´Ù.[2]     lMaxl04
06/16 2076
1569   ÇØÅ· ÇÁ¸®¼­¹ö ¾ø¾îÁ³³ª¿ä?[1]     terfkim
04/15 2973
1568   ½ºÅÿ¡ µ¥ÀÌÅÍ ³ÖÀ» ¶§ SIGSEGV[4]     turttle2s
02/04 2665
1567   pwnable.kr echo1 Áú¹®[2]     turttle2s
06/17 2957
1566   ROP strcpy °ü·Ã Áú¹®ÀÔ´Ï´Ù.[3]     heeyoung0511
06/16 2630
1565   Level2 -> Level3 ¿¡¼­ vi¿Í /usr/bin/EditorÀÇ Â÷ÀÌ[2]     hyemin1826
07/18 3052
1564   Trainer3 ftz.hackerschool.org È£½ºÆ® Á¢¼Ó ºÒ°¡[1]     hyemin1826
07/18 4851
1563   dllÀÎÁ§¼Ç ½ÇÇèÁß Áú¹® µå¸³´Ï´Ù.[1]     kkk477
05/31 3005
1562   ÆÐŶ º¹È£È­¸¦ ¸¶½ºÅÍ ÇÏ·Á¸é ¾î¶² °úÁ¤ÀÌ ÀÖ¾î¾ßÇϳª¿ä?     sa0814
04/01 2575
1561   »ç±â[2]     jas08
03/31 2920
1560   ½Ã½ºÅÛ ÄÝÀÌ °¡´ÉÇÑ ¸Þ¸ð¸® ¿µ¿ª°ú ºÒ°¡´ÉÇÑ ¸Þ¸ð¸® ¿µ¿ªÀÌ Á¸ÀçÇϳª¿ä?     ocal
03/30 2573
1559   pwntools »ç¿ë½Ã¿Í ±âº» socket ¸ðµâ ÀÌ¿ë½Ã Â÷ÀÌ?[4]     ocal
01/09 3495
1558   lob level19(nightmare) °ü·ÃÁú¹®[1]     dnjsdnwja
12/18 2570
1557   ftz level2 Áú¹®ÀÖ½À´Ï´Ù[1]     kihyun1998
12/13 2772
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