
1. ï½èª°ãã®å¤±æãä»å±±ã®ç³ã«ï½ èå¼±æ§äºä¾ã«å¦ã¶ã»ãã¥ã¢ã³ã¼ãã£ã³ã° ãSSL/TLS証ææ¸æ¤è¨¼ãç·¨ JPCERT/CC æ å ±æµé対çã°ã«ã¼ã æ¸ç° æ´ä¸ (yozo.toda@jpcert.or.jp) 1 KOF2014 version 2. Copyright©2014 JPCERT/CC All rights reserved. èªå·±ç´¹ä» http://www.tomo.gr.jp/root/e9706.html JPCERT/CC æ å ±æµé対çã°ã«ã¼ã 解æãã¼ã ãªã¼ãã¢ããªã¹ã æ¸ç° æ´ä¸ èå¼±æ§æ å ±åæ, ã»ãã¥ã¢ã³ã¼ ãã£ã³ã°æ®ååçºæ´»åâ¦â¦ ã«åªãã¦ã¾ã 2
SSL証ææ¸é¸ã³ãééãã㨠ãã£ããã®ã¹ããããã®å£²ä¸ãéãããï¼ ECãµã¤ãéå¶è ã«ã¨ã£ã¦ãã¹ãã¼ããã©ã³ã¸ã®å¯¾å¿ã¯ç«æ¥ã®èª²é¡ã§ããå®éã«ã¹ãã対å¿ãé²ããéã«ã¯ãã¶ã¤ã³ãæä½æ§ã«é æ ®ããå¿ è¦ãããã®ã¯ãã¡ããã§ãããæå¤ã¨å¿ããããã¡ãªã¹ãã対å¿ã®ãã¤ã³ããããã¾ããããã¯ãECãµã¤ãã«ä¸å¯æ¬ ãªSSLãµã¼ãã¼è¨¼ææ¸ã«é¢ããåé¡ã§ãã ECãµã¤ãã®ã¹ãã対å¿ã§SSL証ææ¸ãæ°ã«ããªããã°ãããªãã¨ããã®ã¯ã©ããããã¨ã§ããããï¼ ããã¯ãã±ã¼ã¿ã¤ECã§èµ·ãã¦ããåé¡ã¨åæ§ã®ãã®ã§ããã·ã§ããã³ã°ã«ã¼ããªã©ã®HTTPSéä¿¡ã®ããã«ãµã¼ãã¼ã§SSL証ææ¸ãå©ç¨ãã¾ãããä¸é¨ã®è¨¼ææ¸ãã³ãã¼ã®çºè¡ãã証ææ¸ã§ã¯ã端æ«ã«ãã£ã¦ã¯SSLéä¿¡ãæå¹ã«ãªããªãã¨ããåé¡ã§ãã ããã¨åæ§ã®ãã¨ãã¹ããã§ãæèãã¦ããã®ã大åãªã®ã§ãã ã¹ããå¸å ´ã§ä¸å¤§å¢åã¨ãªã£ã¦ããAndroid端æ«ãä¾ã«èª¬æãã¾
GoogleãOpenSSLããã©ã¼ã¯ãããBoringSSLãã¨ãã¦å ¬éãã(ImperialVioletããã°ã®è¨äºã Ars Technicaã®è¨äºã æ¬å®¶/.)ã Googleã¯ä½å¹´ãã®éãOpenSSLã«æ°å¤ãã®ããããå½ã¦ã¦ä½¿ç¨ãã¦ããã¨ãããä¸é¨ã®ãããã¯OpenSSLã®ã¡ã¤ã³ãªãã¸ããªã«åãè¾¼ã¾ãããã大åã¯APIãABIã®å®å®æ§ã®åé¡ããããªã©ã®çç±ã§åãè¾¼ã¾ãã¦ããªãã£ããAndroidãChromeãªã©ã®è£½åã¯ãããã®ä¸é¨ãå¿ è¦ã¨ãããããããã¯70以ä¸ãããããã«ä½æ¥ãè¤éã«ãªã£ã¦ããããã ããã®ãããOpenSSLããã©ã¼ã¯ãã¦ãOpenSSLå´ã®å¤æ´ãã¤ã³ãã¼ãããæ¹å¼ã«å¤æ´ããã¨ãã¦ãããBoringSSLã¯è¿ããã¡ã«Chromiumã®ãªãã¸ããªã«è¿½å ãããäºå®ã§ããããAndroidãå é¨çã«ã使ãããããã«ãªãããã ããBoringSSLã§ã¯APIãABI
ãã®ã¨ã³ããªã§ã¯ãã¹ãã¼ããã©ã³ã¢ããªã±ã¼ã·ã§ã³ã®éä¿¡æå·åã®å¿ è¦æ§ã«ã¤ãã¦è°è«ãã¾ãã ã¯ããã« å æ¥ãã¹ãã¼ããã©ã³ã¢ããªã±ã¼ã·ã§ã³ã®ã»ãã¥ãªãã£ã«é¢ããã»ããã¼ãè´è¬ãã¾ããï¼2æ8æ¥è¿½è¨ãè¬æ¼è ããã®ä¾é ¼ã«ããã»ããã¼ã®ãµã¤ãã¸ã®ãªã³ã¯ããããã¾ããï¼ããã®éã«ãã¹ãã¼ããã©ã³ã¢ããªã±ã¼ã·ã§ã³ã®è å¨ã«å¯¾ããå ±éèªèãã¾ã ãªãã¨ãã課é¡ãæ¹ãã¦æãã¾ããããã®èª²é¡ãçæã§ããã¨ããç¹ã§ãã»ããã¼ã¯ç§ã«ã¨ã£ã¦ã¯æçã§ããã ãã®ãããå½ããã°ã§ã¯ã¹ãã¼ããã©ã³ã¢ããªã±ã¼ã·ã§ã³ã®è©±é¡ããã¾ãåãä¸ãã¦ãã¾ããã§ããããä»å¾ã¯ãã¨ãããããã¨æãã¾ããã¾ãã¯ãã¹ãã¼ããã©ã³ã¢ããªã±ã¼ã·ã§ã³ã§ã¯æå·åãå¿ é ã¨ããã¹ããã¨ãã話é¡ã§ãããã®è©±é¡ã¯ãåè¨ã»ããã¼ã§ãã¨ãããããã¦ãã¾ããã æå·åã®ç®çã¯ä½ã ã¾ããæå·åã®å¿ è¦æ§ãè«ããããã«ã¯ãæå·åã®ç®çãæ確ã«ããå¿ è¦ãããã¾ããåè¨ã»ã
ãªãªã¼ã¹ãé害æ å ±ãªã©ã®ãµã¼ãã¹ã®ãç¥ãã
ææ°ã®äººæ°ã¨ã³ããªã¼ã®é ä¿¡
å¦çãå®è¡ä¸ã§ã
j次ã®ããã¯ãã¼ã¯
kåã®ããã¯ãã¼ã¯
lãã¨ã§èªã
eã³ã¡ã³ãä¸è¦§ãéã
oãã¼ã¸ãéã
{{#tags}}- {{label}}
{{/tags}}