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»ó¼¼¼³¸í ¿ø°Ý È£½ºÆ®¿¡ ¼³Ä¡µÈ OpenSSL ¹öÀüÀº 1.0.2y ÀÌÀüÀÇ 1.0.2ÀÔ´Ï´Ù. µû¶ó¼­ 1.0.2y ±Ç°í¿¡ ¾ð±Þ µÈ Ãë¾àÁ¡ÀÇ ¿µÇâÀ» ¹Þ½À´Ï´Ù.

-OpenSSL °ø¿ë API ÇÔ¼ö X509_issuer_and_serial_hash ()´Â X509 ÀÎÁõ¼­¿¡ Æ÷ÇÔ µÈ ¹ß±ÞÀÚ ¹× ÀÏ·Ã ¹øÈ£ µ¥ÀÌÅ͸¦ ±â¹ÝÀ¸·Î °íÀ¯ ÇÑ Çؽà °ªÀ» »ý¼ºÇÏ·Á°í ÇÕ´Ï´Ù. ±×·¯³ª issuer Çʵ带 ±¸¹® ºÐ¼®ÇÏ´Â µ¿¾È ¹ß»ýÇÒ ¼ö ÀÖ´Â ¿À·ù¸¦ ¿Ã¹Ù¸£°Ô ó¸®ÇÏÁö ¸øÇÕ´Ï´Ù (issuer Çʵ尡 ¾ÇÀÇÀûÀ¸·Î ±¸¼ºµÈ °æ¿ì ¹ß»ýÇÒ ¼ö ÀÖÀ½). ÀÌ·Î ÀÎÇØ NULL Æ÷ÀÎÅÍ deref°¡ ¹ß»ýÇÏ°í ¼­ºñ½º °ÅºÎ °ø°ÝÀÌ ¹ß»ýÇÒ ¼ö ÀÖ´Â Ãæµ¹ÀÌ ¹ß»ýÇÒ ¼ö ÀÖ½À´Ï´Ù. X509_issuer_and_serial_hash () ÇÔ¼ö´Â OpenSSL ÀÚü¿¡¼­ Á÷Á¢ È£ÃâµÇÁö ¾ÊÀ¸¹Ç·Î ÀÀ¿ë ÇÁ·Î±×·¥Àº ÀÌ ÇÔ¼ö¸¦ Á÷Á¢ »ç¿ëÇÏ°í ½Å·ÚÇÒ ¼ö ¾ø´Â ¼Ò½º¿¡¼­ ¾òÀº ÀÎÁõ¼­¿¡ »ç¿ëÇÏ´Â °æ¿ì¿¡¸¸ Ãë¾àÇÕ´Ï´Ù. OpenSSL ¹öÀü 1.1.1i ÀÌÇÏ´ÂÀÌ ¹®Á¦ÀÇ ¿µÇâÀ» ¹Þ½À´Ï´Ù. ÀÌ·¯ÇÑ ¹öÀüÀÇ »ç¿ëÀÚ´Â OpenSSL 1.1.1j·Î ¾÷±×·¹À̵åÇؾßÇÕ´Ï´Ù. OpenSSL ¹öÀü 1.0.2x ÀÌÇÏ´Â ÀÌ ¹®Á¦ÀÇ ¿µÇâÀ» ¹Þ½À´Ï´Ù. ±×·¯³ª OpenSSL 1.0.2´Â Áö¿øµÇÁö ¾ÊÀ¸¸ç ´õ ÀÌ»ó °ø°³ ¾÷µ¥ÀÌÆ®¸¦ ¹ÞÁö ¾Ê½À´Ï´Ù. OpenSSL 1.0.2ÀÇ ÇÁ¸®¹Ì¾ö Áö¿ø °í°´Àº 1.0.2y·Î ¾÷±×·¹À̵åÇØ¾ß ÇÕ´Ï´Ù. ´Ù¸¥ »ç¿ëÀÚ´Â 1.1.1j·Î ¾÷±×·¹À̵åÇØ¾ß ÇÕ´Ï´Ù. OpenSSL 1.1.1j¿¡¼­ ¼öÁ¤µÇ¾ú½À´Ï´Ù (¿µÇâÀ»¹Þ´Â 1.1.1-1.1.1i). OpenSSL 1.0.2y¿¡¼­ ¼öÁ¤µÇ¾ú½À´Ï´Ù (¿µÇâÀ»¹Þ´Â ¹öÀü 1.0.2-1.0.2x). (CVE-2021-23841)

-EVP_CipherUpdate, EVP_EncryptUpdate ¹× EVP_DecryptUpdate¿¡ ´ëÇÑ È£ÃâÀº ÀÔ·Â ±æÀÌ°¡ Ç÷§ÆûÀÇ Á¤¼ö¿¡ ´ëÇØ Çã¿ëµÇ´Â ÃÖ´ë ±æÀÌ¿¡ °¡±î¿î °æ¿ì¿¡ Ãâ·Â ±æÀÌ Àμö¸¦ ¿À¹öÇ÷ΠÇÒ ¼ö ÀÖ½À´Ï´Ù. ÀÌ·¯ÇÑ °æ¿ì ÇÔ¼ö È£ÃâÀÇ ¹Ýȯ °ªÀº 1 (¼º°øÀ» ³ªÅ¸³¿)ÀÌ µÇÁö¸¸ Ãâ·Â ±æÀÌ °ªÀº À½¼ö°¡µË´Ï´Ù. ÀÌ·Î ÀÎÇØ ÀÀ¿ë ÇÁ·Î±×·¥ÀÌ À߸ø ÀÛµ¿Çϰųª Ãæµ¹ÀÌ ¹ß»ýÇÒ ¼ö ÀÖ½À´Ï´Ù.
OpenSSL ¹öÀü 1.1.1i ÀÌÇÏ´Â ÀÌ ¹®Á¦ÀÇ ¿µÇâÀ»¹Þ½À´Ï´Ù. ÀÌ·¯ÇÑ ¹öÀüÀÇ »ç¿ëÀÚ´Â OpenSSL 1.1.1j·Î ¾÷±×·¹À̵åÇØ¾ß ÇÕ´Ï´Ù. OpenSSL ¹öÀü 1.0.2x ÀÌÇÏ´ÂÀÌ ¹®Á¦ÀÇ ¿µÇâÀ» ¹Þ½À´Ï´Ù. ±×·¯³ª OpenSSL 1.0.2´Â Áö¿øµÇÁö ¾ÊÀ¸¸ç ´õ ÀÌ»ó °ø°³ ¾÷µ¥ÀÌÆ®¸¦¹ÞÁö ¾Ê½À´Ï´Ù. OpenSSL 1.0.2ÀÇ ÇÁ¸®¹Ì¾ö Áö¿ø °í°´Àº 1.0.2y·Î ¾÷±×·¹À̵åÇØ¾ß ÇÕ´Ï´Ù. ´Ù¸¥ »ç¿ëÀÚ´Â 1.1.1j·Î ¾÷±×·¹À̵åÇØ¾ß ÇÕ´Ï´Ù. OpenSSL 1.1.1j¿¡¼­ ¼öÁ¤µÇ¾ú½À´Ï´Ù (¿µÇâÀ»¹Þ´Â 1.1.1-1.1.1i).
OpenSSL 1.0.2y¿¡¼­ ¼öÁ¤µÇ¾ú½À´Ï´Ù (¿µÇâÀ»¹Þ´Â 1.0.2-1.0.2x). (CVE-2021-23840)
* Âü°í »çÀÌÆ®:
https://www.openssl.org/news/secadv/20210216.txt

* ¿µÇâÀ» ¹Þ´Â Ç÷§Æû:
1.0.2wÀÌÀüÀÇ OpenSSL 1.0.2x
Linux Any version
Unix Any version
Microsoft Windows Any version
ÇØ°áÃ¥ OpenSSL À¥ »çÀÌÆ®ÀÎ http://www.openssl.org/ ¿¡¼­ ±¸ÇÒ ¼ö ÀÖ´Â OpenSSLÀÇ °¡Àå ÃֽŠ¹öÀü(1.0.2y ¶Ç´Â ÀÌÈÄ)À¸·Î ¾÷±×·¹À̵å ÇÏ¿©¾ß ÇÑ´Ù.
°ü·Ã URL CVE-2021-23839,CVE-2021-23840,CVE-2021-23841 (CVE)
°ü·Ã URL (SecurityFocus)
°ü·Ã URL (ISS)