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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸°úÇÐȸ ³í¹®Áö > Á¤º¸°úÇÐȸ ³í¹®Áö C : ÄÄÇ»ÆÃÀÇ ½ÇÁ¦

Á¤º¸°úÇÐȸ ³í¹®Áö C : ÄÄÇ»ÆÃÀÇ ½ÇÁ¦

Current Result Document : 8 / 11 ÀÌÀü°Ç ÀÌÀü°Ç   ´ÙÀ½°Ç ´ÙÀ½°Ç

ÇѱÛÁ¦¸ñ(Korean Title) ½ºÅà °ø°Ý ŽÁö¿Í ¹æ¾î¸¦ À§ÇÑ ¹Ýȯ ÁÖ¼Ò ÀÌÁß ÀÎÄÚµù
¿µ¹®Á¦¸ñ(English Title) Dual-Encoding of Return Addresses for Detection and Defense against Stack Attacks
ÀúÀÚ(Author) ±è°æÅ   ǥâ¿ì   ±è¼±ÀÏ   ÀÌ°æÈ£   Kyungtae Kim   Changwoo Pyo   Sunil Kim   Gyungho Lee  
¿ø¹®¼ö·Ïó(Citation) VOL 17 NO. 03 PP. 0159 ~ 0164 (2011. 03)
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(Korean Abstract)
ÇÁ·Î±×·¥ Ä«¿îÅÍ ÀÎÄÚµùÀº Á¦¾î µ¥ÀÌÅÍÀÇ ´ëºÎºÐÀ» Â÷ÁöÇÏ´Â ÄÚµå Æ÷ÀÎÅ͸¦ ¾Ïȣȭ ÇÏ´Â ÇÁ·Î±×·¥ Àڱ⺸ȣÀÇ ¹æ¹ýÀÌ´Ù. ÀÌ ³í¹®Àº ÇÔ¼ö ¹Ýȯ ÁÖ¼Ò¿¡ ´ëÇÑ ÇÁ·Î±×·¥ Ä«¿îÅÍ ÀÎÄÚµùÀÇ ¹æ¾î·Â°ú °ø°Ý ŽÁö ´É·ÂÀ» °³¼±Çϱâ À§ÇÑ ¹æ¹ýÀ¸·Î¼­ ¹Ýȯ ÁÖ¼Ò ÀÌÁß ÀÎÄÚµùÀ» Á¦½ÃÇÑ´Ù. ¹Ýȯ ÁÖ¼Ò ÀÌÁß ÀÎÄÚµùÀº ¹Ýȯ ÁÖ¼Ò¸¦ ¾Ïȣȭ ÇÒ ¶§ µ¶¸³ÀûÀÎ 2°³ÀÇ ¾Ïȣȭ Å°¸¦ »ç¿ëÇÏ¿© 2¹úÀÇ ¾Ïȣȭ µÈ ¹Ýȯ ÁÖ¼Ò¸¦ ¸¸µé¾î º¸°üÇÑ´Ù. 64 ºñÆ®ÀÇ ¾Ïȣȭ Å°¸¦ »ç¿ëÇÏ¿© ÀÎÄÚµù ÇÑ °Í°ú °°Àº È¿°ú¸¦ °¡Á®¿Í ¹Ýȯ ÁÖ¼Ò¿¡ ´ëÇÑ °ø°Ý ¼º°ø È®·üÀ» 1/264·Î ³·Ã߸ç, 2¹úÀÇ ¾ÏȣȭµÈ ÁÖ¼Ò¸¦ µðÄÚµùÇÏ¿© ºñ±³ÇÔÀ¸·Î½á °ø°Ý ¿©ºÎ¸¦ Á¤È®È÷ ÆÇÁ¤ÇÒ ¼ö ÀÖ´Ù. x86 ¸¶ÀÌÅ©·ÎÇÁ·Î¼¼¼­¸¦ Ÿ°ÙÀ¸·Î ÇÏ´Â GNU C ÄÄÆÄÀÏ·¯¸¦ ¼öÁ¤ÇÏ¿© ¹Ýȯ ÁÖ¼Ò ÀÌÁß ÀÎÄÚµùÀ» ±¸ÇöÇÏ¿´°í, À̸¦ »ç¿ëÇÑ ¸ðÀÇ °ø°Ý°ú ¼º´É ½ÇÇèÀ» ½Ç½ÃÇÏ¿´´Ù. GCC¿¡ ³»ÀåµÈ ProPolice¿Í ºñ±³ÇÒ ¶§ ProPolice°¡ ŽÁöÇÏÁö ¸øÇÏ´Â 2°¡Áö °ø°Ý À¯ÇüÀ» Ãß°¡·Î ŽÁöÇÏ¿´°í, 8.62% ¼öÁØÀÇ ½ÇÇà ½Ã°£ °úºÎÇÏ ¼öÁØÀ» º¸¿´´Ù. ÀÌÁß ÀÎÄÚµùÀº ¹Ýȯ ÁÖ¼Ò»Ó¸¸ ¾Æ´Ï¶ó ¸ðµç ÄÚµå Æ÷ÀÎÅÍ¿¡ ´ëÇØ Àû¿ëÀÌ °¡´ÉÇϸç, ÀϺΠµ¥ÀÌÅÍ Æ÷ÀÎÅ͵µ Àû´çÇÑ ¼º´É °úºÎÇÏ·Î Àû¿ëÇÒ ¼ö ÀÖÀ» °ÍÀ¸·Î ¿¹»óµÈ´Ù.
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(English Abstract)
Program counter encoding is a programs¡¯ self-protection method by encrypting code pointers that comprise most control data. This paper presents return address dual-encoding improving defense and detection capabilities of program counter encoding for return addresses. Return address dual-encoding stores two versions of a return address encrypted by using two independent keys. It has the same effect using 64-bit keys suppressing the probability of successful attacks to 1/264. Two version of return address can be used for accurate detection of attacks by decrypting the encrypted addresses and comparing one with the other. We have implemented the idea in the GCC compiler for x86 and experimented defense capabilities and performance using the compiler. Compared with ProPolice embedded in GCC, ours could detect defend against two additional attack patterns. Performance overhead was less than 9%. Dual-encoding can be applied to all code pointers and some data pointers with reasonable performance overhead.
Å°¿öµå(Keyword) ÇÁ·Î±×·¥ Ä«¿îÅÍ ÀÎÄÚµù   ÀÌÁß ÀÎÄÚµù   ÇÁ·Î±×·¥ Àڱ⠺¸È£   ÇÁ·Î±×·¥ °ø°Ý ŽÁö   ½ºÅà °ø°Ý   program counter encoding   dual-encoding   program self-protection   program attack detection   stack attack  
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