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»ó¼¼¼³¸í ÇØ´ç ½Ã½ºÅÛ¿¡´Â 'Exchange Server 5.5¸¦ À§ÇÑ OWA¿¡ ÀÖ´Â XSS Ãë¾àÁ¡'¿¡ ´ëÇÑ hotfix(895179)°¡ ¼³Ä¡µÇ¾î ÀÖÁö ¾Ê´Ù. Outlook Web Access (OWA) ¼­ºñ½º¸¦ ÀÌ¿ëÇÏ¿© Microsoft Exchange 5.5 ¼­¹ö´Â Compose New Message ÆûÀ¸·Î HTML encodingÀ» OWA°¡ ¼öÇàÇÏ´Â °úÁ¤¿¡¼­ÀÇ Ãë¾àÁ¡À¸·Î ÀÎÇÏ¿© Cross-Site Scripting ¹× Spoofing °ø°Ýµé¿¡ Ãë¾àÇÏ´Ù.
Cross-Site Scripting Ãë¾àÁ¡Àº °ø°ÝÀÚ°¡ ¾ÇÀÇÀûÀÎ ½ºÅ©¸³Æ®¸¦ ¾î¶² »ç¿ëÀÚ°¡ ½ÇÇàÇϵµ·Ï À¯µµÇÒ ¼ö ÀÖ°Ô ÇØ ÁØ´Ù. ÀÌ Ãë¾àÁ¡À» ¼º°øÀûÀ¸·Î µµ¿ëÇÏ°Ô µÇ¸é °ø°ÝÀÚ´Â Web Access ¼¼¼ÇÀ¸·Î ÀÓÀÇÀÇ ½ºÅ©¸³Æ® Äڵ带 ÁÖÀÔÇÒ ¼ö ÀÖ´Ù. ÀÌ°ÍÀº ÀÎÁõ Á¤º¸ÀÇ Å»Ã븦 Çã¿ëÇÏ¿© ¸ÞÀÏ °èÁ¤ Á¤º¸°¡ À¯ÃâµÉ ¼ö ÀÖ´Ù. ½ÇÁ¦ µµ¿ëÀÌ ÀÌ·ç¾îÁö±â À§Çؼ­´Â ´ë»ó »ç¿ëÀÚ°¡ ´ÜÁö °ø°ÝÀڷκÎÅÍ ¹ÞÀº e-mailÀ» º¸±â¸¸ ÇÏ¸é µÈ´Ù. ¶ÇÇÑ À¥ ºê¶ó¿ìÀú ij½¬(cache)¿Í Áß°è ÇÁ·Ï½Ã(proxy) ¼­¹ö ij½¬¸¦ Á¶ÀÛÇÏ¿© ±× ij½¬µé¿¡ °¡Â¥ ³»¿ëÀ» ³Ö±â À§ÇÏ¿© ÀÌ Ãë¾àÁ¡À» µµ¿ëÇÒ °¡´É¼ºµµ ÀÖ´Ù.

* ¾Ë¸²: ÀÌ Á¡°ËÇ׸ñÀº Á¡°ËÇϱâ À§ÇÑ ¿ø°ÝÁö È£½ºÆ®ÀÇ ·¹Áö½ºÆ®¸®¸¦ ¾×¼¼½ºÇÒ ¼ö ÀÖ´Â Guest ȤÀº ±× ÀÌ»óÀÇ ±ÇÇÑÀ» °¡Áø °èÁ¤À» ÇÊ¿ä·Î ÇÑ´Ù. ÀÌ·¯ÇÑ Á¶°ÇÀÌ ¾ÈµÇ¸é Á¡°ËÀ» ¼öÇàÇÒ ¼ö ¾øÀ¸¸ç ¸ðµç Ãë¾àÇÑ È£½ºÆ®µé¿¡ ´ëÇؼ­ °ÅÁþ À½¼º¹ÝÀÀ(False Negative)À» º¸ÀÏ ¼ö ÀÖ´Ù.

* Âü°í »çÀÌÆ®:
http://www.microsoft.com/technet/security/bulletin/ms05-029.mspx
http://secunia.com/advisories/15697
http://www.kb.cert.org/vuls/id/300373

* ¿µÇâÀ» ¹Þ´Â Ç÷§Æû:
Microsoft Exchange 5.5 SP4
Microsoft IIS 5.0
Microsoft Internet Explorer 6.0 SP1
Microsoft Windows 2000 SP3 ȤÀº ÀÌÈÄ
ÇØ°áÃ¥ ´ÙÀ½ ¸¶ÀÌÅ©·Î¼ÒÇÁÆ® º¸¾È °Ô½Ã¹° MS05-029¸¦ ÂüÁ¶ÇÏ¿© ½Ã½ºÅÛ¿¡ ´ëÇÑ ÀûÀýÇÑ ÆÐÄ¡(KB895179)¸¦ Àû¿ëÇÑ´Ù:
http://www.microsoft.com/technet/security/bulletin/ms05-029.mspx

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Windows Ç÷§ÆûµéÀ» À§ÇÑ ÆÐÄ¡µéÀº ¶ÇÇÑ Microsoft Windows Update À¥ »çÀÌÆ®ÀÎ http://windowsupdate.microsoft.com ¿¡¼­µµ ±¸ÇÒ ¼ö ÀÖ´Ù. Windows Update´Â »ç¿ë ÁßÀÎ WindowsÀÇ ¹öÀüÀ» ÀÚµ¿À¸·Î ã¾Æ³»°í ÀûÀýÇÑ ÆÐÄ¡¸¦ Á¦°øÇØ ÁØ´Ù.
°ü·Ã URL CVE-2005-0563 (CVE)
°ü·Ã URL 13952 (SecurityFocus)
°ü·Ã URL 20967 (ISS)