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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Ã³¸®ÇÐȸ ³í¹®Áö > Á¤º¸Ã³¸®ÇÐȸ ³í¹®Áö C

Á¤º¸Ã³¸®ÇÐȸ ³í¹®Áö C

Current Result Document : 4 / 8 ÀÌÀü°Ç ÀÌÀü°Ç   ´ÙÀ½°Ç ´ÙÀ½°Ç

ÇѱÛÁ¦¸ñ(Korean Title) ¹«Â÷º° °ø°Ý¿¡ È¿°úÀûÀÎ ´ÙÁß Address Space Randomization ¹æ¾î ±â¹ý
¿µ¹®Á¦¸ñ(English Title) Multiple ASR for efficient defense against brute force attacks
ÀúÀÚ(Author) ¹Ú¼öÇö   ±è¼±ÀÏ   Soohyun Park   Sunil Kim  
¿ø¹®¼ö·Ïó(Citation) VOL 18-C NO. 02 PP. 0089 ~ 0096 (2011. 04)
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(Korean Abstract)
Address Space Randomization(ASR)Àº ¼º´É ºÎÇÏ°¡ ¾ø°í ±¤¹üÀ§ÇÑ µ¥ÀÌÅÍ ¸Þ¸ð¸® ¿µ¿ªÀÇ º¸È£°¡ °¡´ÉÇÑ ¿ì¼öÇÑ ¹æ¾î ±â¹ýÀÌ´Ù. ASRÀº »ç¿ë °¡´ÉÇÑ µ¥ÀÌÅÍ ¸Þ¸ð¸® ¿µ¿ª ³»¿¡¼­ º¯¼ö¸¦ Àç¹èÄ¡ ÇÔÀ¸·Î½á °ø°ÝÀÚ¿¡°Ô º¯¼öÀÇ ÁÖ¼Ò¸¦ ¼û±â´Âµ¥, µ¥ÀÌÅÍ ¸Þ¸ð¸® ¿µ¿ªÀÇ Å©±â°¡ ÇÑÁ¤µÇ¾î¼­ ¹«Â÷º° °ø°Ý¿¡ Ãë¾àÇÑ ´ÜÁ¡ÀÌ ÀÖ´Ù. º» ³í¹®Àº ±âÁ¸ ASRÀÇ ´ÜÁ¡À» Á¦°ÅÇϱâ À§ÇÑ ´ÙÁß ASR ±â¹ýÀ» Á¦½ÃÇÑ´Ù. ´ÙÁß ASR ±â¹ýÀº µ¥ÀÌÅÍ ¸Þ¸ð¸® ¿µ¿ªÀ» ¿øº» ¹× º¹»ç ¿µ¿ªÀ¸·Î ³ª´©°í °¢ ¸Þ¸ð¸® ¿µ¿ªÀÇ º¯¼ö °ªÀ» ºñ±³ÇÔÀ¸·Î½á °ø°ÝÀ» ŽÁöÇÏ°í ¹æ¾îÇÑ´Ù. ´ÙÁß ASR¿¡¼­ °¢ µ¥ÀÌÅÍ ¸Þ¸ð¸® ¿µ¿ªÀÇ º¯¼ö´Â ¼­·Î ´Ù¸¥ ¼ø¼­·Î ¹èÄ¡µÇ¹Ç·Î ÇÑ ¹øÀÇ °ø°ÝÀ» ÅëÇØ µ¿½Ã¿¡ µ¿ÀÏÇÑ º¯¼ö °ªÀ» Á¶ÀÛÇÏ´Â °ÍÀº ºÒ°¡´ÉÇÏ´Ù. ´ÙÁß ASRÀÌ Àû¿ëµÈ ÇÁ·Î±×·¥Àº Áߺ¹ ¼öÇàÀ¸·Î ÀÎÇØ ºñ±³Àû ³ôÀº ¼º´É ºÎÇϸ¦ º¸À̳ª, ½ÇÁ¦ °ø°Ý ´ë»óÀÌ µÇ´Â À¥¼­¹ö µî I/O 󸮰¡ ¸¹ÀÌ ¿ä±¸µÇ´Â ÇÁ·Î±×·¥ÀÇ °æ¿ì 40%~50% Á¤µµÀÇ ¼º´É ºÎÇϸ¦ º¸ÀδÙ. ¾Æ¿ï·¯ º» ³í¹®¿¡¼­´Â ÇÁ·Î±×·¥¿¡ ´ÙÁß ASRÀ» Àû¿ëÇϱâ À§ÇÑ º¯È¯ÇÁ·Î±×·¥À» °³¹ßÇÏ¿´´Ù.
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(English Abstract)
ASR is an excellent program security technique that protects various data memory areas without run-time overhead. ASR hides the addresses of variables from attackers by reordering variables within a data memory area; however, it can be broken by brute force attacks because of a limited data memory space. In this paper, we propose Multiple ASR to overcome the limitation of previous ASR approaches. Multiple ASR separates a data memory area into original and duplicated areas, and compares variables in each memory area to detect an attack. In original and duplicated data memory areas variables are arranged in the opposite order. This makes it impossible to overwrite the same variables in the different data areas in a single attack. Although programs with Multiple ASR show a relatively high run-time overhead due to duplicated execution, programs with many I/O operations such as web servers, a favorite attack target, show 40~50% overhead. In this paper we develop and test a tool that transforms a program into one with Multiple ASR applied.
Å°¿öµå(Keyword) ÇÁ·Î±×·¥ º¸¾È   ASR(Address Space Randomization)   ¹öÆÛ¿À¹öÇ÷Π  ÇÁ·Î±×·¥ º¯È¯   Program Security   ASR(Address Space Randomization)   Buffer Overflow   Program Transformation  
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