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   libc°ü·Ã - 2

http://www.hackerschool.org/HS_Boards/zboard.php?id=QNA_system&no=2009 [º¹»ç]


¸¹Àº ctf¸¦ º¸¸é libc ÆÄÀÏÀ» Á¦°øÇÕ´Ï´Ù.
ÇØ´ç ÆÄÀÏÀ» ld preload¸¦ ÅëÇØ ÂüÁ¶Çϸé, ld ÆÄÀÏ°ú ¹öÀüÀÌ ¸ÂÁö ¾Ê¾Æ ¿¡·¯°¡ ¹ß»ýÇÏ´Â °æ¿ì°¡ ´ëºÎºÐÀÎ °Í °°½À´Ï´Ù.
ÀÌ °æ¿ì ¾î¶»°Ô ÇØ°áÇÏ´Â°Ô ÁÁÀº°¡¿ä?

´õºÒ¾î libcÀÇ md5 °ªÀ¸·Î ld ÆÄÀÏÀ» ã¾Æ libc¿Í ld ÆÄÀÏÀ» ±³Ã¼ÇØÁÙ ¼ö ÀÖ±ä ÇÕ´Ï´Ù¸¸, ld ÆÄÀÏÀÌ Àß Ã£¾ÆÁöÁö ¾Ê´Â °æ¿ìµµ ¸¹ÀÌ ÀÖ´Â °Í °°½À´Ï´Ù.
ÀÌ °æ¿ì¿¡´Â ¾î¶»°Ô Çϳª¿ä?

  Hit : 875     Date : 2022/08/24 07:21



    
cd80 Á¦°øµÈ libc¶û °°ÀÌ ½ÇÇàÇØ¾ß ÇÒ ÀÌÀ¯°¡ ¾ø½À´Ï´Ù
±×³É ³» ½Ã½ºÅÛ¿¡ ÀÖ´Â libc·Î ÀͽºÇ÷ÎÀÕ ÀÛ¼ºÇÏ°í ½ÇÁ¦ exploitÇÒ ¶§´Â ¸®¸ðÆ®¼­¹öÀÇ offsetÀ¸·Î ¼öÁ¤ÇØÁÖ¸é µË´Ï´Ù
2022/08/24  
lMaxl04 ¾È³çÇϼ¼¿ä ¤¾¤¾
¸»¾¸ÇϽŠ°Íµµ ÀÌÇØ°¡ µÇ°í ´ëºÎºÐ ±×·¸°Ô Ç®°í ÀÖ½À´Ï´Ù¸¸, ±×³É ¿øÃÊÀûÀÎ ±Ã±ÝÁ¡ÀÔ´Ï´Ù ¤¾¤¾
2022/08/24  
lMaxl04 ¿ä¾àÇϸé
1. ldÆÄÀÏ ¾øÀÌ libc ÆÄÀÏÀ» ·Îµå °¡´ÉÇÑ°¡
2. libc ¹öÀü¿¡ ¸Â´Â ld ÆÄÀÏÀº ¾î¶»°Ô ¾îµð¼­ ãÀ» ¼ö Àִ°¡
ÀÔ´Ï´Ù ¤¾¤¾
2022/08/24  
cd80 libcÀÇ md5 °ªÀ¸·Î ldÆÄÀÏÀ» ã¾Æº¸¼Ì´Ü°ÉºÁ¼­ ¾Æ½Ç°Å°°±âµµÇѵ¥ Á¦°¡ ¾Ë±â·Ð libc-database°¡ °¡Àå ÁÁÁö ¾ÊÀ»±î ½Í½À´Ï´Ù
https://github.com/niklasb/libc-database
¿©±â¿¡µµ ´ÙÀÖ´Â°Ç ¾Æ´Ï±äÇÏÁö¸¸ ²Ï ¸¹ÀÌ ÀÖ½À´Ï´Ù

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2022/08/25  
lMaxl04 °¨»çÇÕ´Ï´Ù. Çѹø ½ÃµµÇغ¸°Ú½À´Ï´Ù ¤¾¤¾ 2022/08/25  
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07/26 1360
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10/05 1230
12   ASLRÀÌ °É·ÁÀÖÀ»¶§ ret¿¡ ROPÀ¸·Î jmp %espÀ» »ç¿ëÇÑ °æ¿ì.[3]     lMaxl04
06/29 1138
11   ¸®¸ðÆ® ȯ°æ¿¡¼­ÀÇ ½ºÅà ÁÖ¼Ò È®ÀÎ ¹æ¹ýÀÌ ±Ã±ÝÇÕ´Ï´Ù.[2]     lMaxl04
06/16 934
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08/24 913
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08/24 874
8 ºñ¹Ð±ÛÀÔ´Ï´Ù  asdad[6]     knightpop
12/07 855
7 ºñ¹Ð±ÛÀÔ´Ï´Ù  À̰͵µ ÇØÅ·Àΰ¡¿ä?     rain37
03/19 4
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07/17 2
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1 ºñ¹Ð±ÛÀÔ´Ï´Ù  À¯·¹Ä« Æ÷Å» ½Ã½ºÅÛ¿¡ ´ëÇØ Àß ¾Æ½Ã´Â ºÐ     cla12
12/24 0
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