English
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Ãë¾àÁ¡ID 14046
À§Çèµµ 30
Æ÷Æ® 22
ÇÁ·ÎÅäÄÝ TCP
ºÐ·ù SSH
»ó¼¼¼³¸í OpenSSHÀÇ ¹è³Ê Á¤º¸¿¡ µû¸£¸é ÇØ´ç ¼­¹ö¿¡´Â GSSAPI ´ÙÁß Ãë¾àÁ¡µéÀÌ Á¸ÀçÇÑ´Ù. OpenSSHÀº Secure Shell (SSH) ÇÁ·ÎÅäÄÝÀÇ °ø°³ ¼Ò½º Ŭ¶óÀ̾ðÆ® ¹× ¼­¹ö ±¸ÇöÀÌ´Ù. OpenSSH 4.4 ÀÌÀüÀÇ ¹öÀüµéÀº ´ÙÀ½°ú °°Àº ´ÙÁßÀÇ Ãë¾àÁ¡µé¿¡ Ãë¾àÇÏ´Ù:

1) ¿ø°ÝÁöÀÇ °ø°ÝÀÚ´Â GSSAPI ÀÎÁõ ½ÇÆÐ ¿À·ù¸¦ µµ¿ëÇÏ¿© ¸î¸î Ç÷§Æûµé¿¡¼­ »ç¿ëÀÚ¸íµéÀÇ Å¸´ç¼ºÀ» °áÁ¤ÇÒ ¼ö ÀÖ´Ù.
2) ¿ø°ÝÁöÀÇ °ø°ÝÀÚ´Â º¸È£µÇÁö ¾ÊÀº ½Ã±×³Î 󸮱â(signal handler)¿¡ ÀÖ´Â °æÀï Á¶°Ç(race condition)À» µµ¿ëÇÏ¿© ¼­ºñ½º °ÅºÎ Á¶°ÇµéÀ» ÀÏÀ¸Å³ ¼ö ÀÖ´Ù. ¿ø°ÝÁöÀÇ °ø°ÝÀÚ°¡ ÀÌ·ÐÀûÀ¸·Î´Â ÀÌ °áÇÔÀ» µµ¿ëÇÏ¿© GSSAPI ÀÎÁõÀÌ »ç¿ë ÁßÀÎ Á¶°Ç¿¡¼­ ÀÓÀÇÀÇ Äڵ带 ½ÇÇà½Ãų ¼ö ÀÖ´Ù.

* ¾Ë¸²: ÀÌ Á¡°ËÇ׸ñÀº ÀÌ Ãë¾àÁ¡À» Á¡°ËÇϱâ À§ÇØ ÇØ´ç SSH ¼­¹öÀÇ ¹è³Ê Á¤º¸¸¸À» È®ÀÎÇÑ´Ù. µû¶ó¼­ °ÅÁþ ¾ç¼º¹ÝÀÀ(False Positive)À» º¸ÀÏ ¼ö ÀÖ´Ù.

* Âü°í »çÀÌÆ®:
http://www.openssh.com/txt/release-4.4
http://www.kb.cert.org/vuls/id/851340
http://www.arkoon.fr/upload/alertes/36AK-2006-07-FR-1.0_FAST360_OPENSSH.pdf
http://www.arkoon.fr/upload/alertes/43AK-2006-09-FR-1.0_SSL360_OPENSSH.pdf
http://www.securitytracker.com/alerts/2006/Sep/1016939.html
http://www.securitytracker.com/alerts/2006/Sep/1016940.html
http://secunia.com/advisories/22173
http://www.securityfocus.com/archive/1/archive/1/447861/100/200/threaded

* ¿µÇâÀ» ¹Þ´Â Ç÷§Æû:
OpenSSH ¹öÀü 4.3 ±×¸®°í ±× ÀÌÀüÀÇ ¹öÀüµé
¸ðµç ¿î¿µÃ¼Á¦ ¸ðµç ¹öÀü
ÇØ°áÃ¥ OpenSSHÀÇ À¥ »çÀÌÆ®ÀÎ http://www.openssh.org/ ¿¡¼­ ±¸ÇÒ ¼ö ÀÖ´Â OpenSSHÀÇ °¡Àå ÃֽŠ¹öÀü(4.4 ȤÀº ÀÌÈÄ)À¸·Î ¾÷±×·¹À̵å ÇÏ¿©¾ß ÇÑ´Ù.
°ü·Ã URL CVE-2006-5051,CVE-2006-5052 (CVE)
°ü·Ã URL 20241,20245 (SecurityFocus)
°ü·Ã URL 29254,29255 (ISS)