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Ãë¾àÁ¡ID 29128
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»ó¼¼¼³¸í Cisco IOSÀÇ ¹öÀü Á¤º¸¿¡ µû¸£¸é ÇØ´ç ¼ÒÇÁÆ®¿þ¾î¿¡´Â Tcl ¼¿ ¸ðµå¿¡¼­ AAA ¸í·É¾î¸¦ ÅëÇÑ ÀÎÁõ ¿ìȸ Ãë¾àÁ¡(CISCO ¹ö±× ID CSCef77770)ÀÌ Á¸ÀçÇÑ´Ù. AAA´Â (Authentication Authorization Accounting) Cisco ¶ó¿ìÅÍ¿¡¼­ Á¢±Ù Á¦¾î¸¦ À§ÇÑ °¡Àå ¿ì¼±ÀûÀÌ°í ÃßõµÇ´Â ¹æ¹ýÀÌ´Ù. Cisco IOS 12.0, 12.1, 12.2, 12.3°ú 12.4 ¹öÀüµéÀº Tcl (Tool Command Language) ½©(shell)À» ÅëÇØ ½ÇÇàµÈ ¸í·É¾îµé¿¡ ´ëÇؼ­´Â AAA ¸í·É¾î ±ÇÇѺο© °Ë»ç¸¦ ºü¶ß¸²À¸·Î ÀÎÇÏ¿©, ÀÎÁõ ¿ìȸ Ãë¾àÁ¡¿¡ Ãë¾àÇÏ´Ù. ÀÌ °áÇÔ¿¡ ´õÇÏ¿©, AAA ±ÇÇÑ ºÎ¿©¿Í Tcl Áö¿øÀÌ »ç¿ë ÇÔÀ¸·Î µÇ¾î ÀÖ´Ù¸é, ¿ø°ÝÁöÀÇ °ø°ÝÀÚ´Â Tcl ½© ¸ðµå ³»¿¡¼­ CIsco IOS·ÎºÎÅÍ »ó½ÂµÈ ±ÇÇÑÀ» ¾ò¾î³¾ ¼öµµ ÀÖ´Ù.

* ¾Ë¸²: ÀÌ Á¡°ËÇ׸ñÀº ÀÌ Ãë¾àÁ¡À» Á¡°ËÇϱâ À§ÇØ ÇØ´ç ½Ã½ºÅÛÀÇ ¹öÀüÁ¤º¸¸¸À» È®ÀÎÇÑ´Ù. µû¶ó¼­ °ÅÁþ ¾ç¼º¹ÝÀÀ(False Positive)À» º¸ÀÏ ¼ö ÀÖ´Ù. ÀÌ Á¡°ËÇ׸ñÀº ¶ÇÇÑ ¹öÀüÁ¤º¸¸¦ ¼öÁýÇϱâ À§ÇÏ¿© Àб⠱ÇÇÑÀÇ SNMP Community ¹®ÀÚ¿­À» ÇÊ¿ä·Î ÇÑ´Ù. À̸¦ À§Çؼ­´Â Á¤Ã¥ ÆíÁý±â¿¡¼­ Á¡°ËÇ׸ñ "snmp/guessable/r"¿¡ Ÿ´çÇÑ Community ¹®ÀÚ¿­À» Ãß°¡ÇÏ¿©¾ß ÇÑ´Ù. ±×¸®°í ¶ÇÇÑ, IPv6°¡ »ç¿ë ÁßÁö µÇ¾î ÀÖ´Ù¸é ÀÌ Ãë¾àÁ¡Àº Àû¿ëµÇÁö ¾Ê´Â´Ù. ¸¸¾à AAA ±ÇÇÑ ºÎ¿©³ª Tcl Áö¿øÀÌ »ç¿ë ÁßÁöµÇ¾î ÀÖ´Ù¸é ÀÌ Ãë¾àÁ¡Àº ¹«½ÃÇÑ´Ù.

* Âü°í »çÀÌÆ®:
http://securitytracker.com/id?1015543
http://secunia.com/advisories/18613
http://www.osvdb.org/22723

* ¿µÇâÀ» ¹Þ´Â Ç÷§Æû:
Cisco IOS 12.0, 12.1, 12.2, 12.3°ú 12.4 ¹öÀüµé
ÇØ°áÃ¥ ´ÙÀ½ Cisco º¸¾È ±Ç°í¾È(Response to AAA Command Authorization by-pass)ÀÇ "Software Versions and Fixes" ¸¦ ÂüÁ¶ÇÏ¿© ¹®Á¦°¡ ÇØ°áµÈ ¹öÀüÀ¸·Î ¾÷±×·¹À̵å ÇÏ¿©¾ß ÇÑ´Ù:
http://www.cisco.com/warp/public/707/cisco-response-20060125-aaatcl.shtml

¾÷±×·¹À̵åµéÀº Cisco À¥ »çÀÌÆ®ÀÎ http://www.cisco.com ¿¡ ÀÖ´Â Software Center¸¦ ÅëÇØ ±¸ÇÒ ¼ö ÀÖ´Ù.
°ü·Ã URL CVE-2006-0485,CVE-2006-0486 (CVE)
°ü·Ã URL 16383 (SecurityFocus)
°ü·Ã URL 24308 (ISS)