2016/03/02

SSLv2 可能也不安全了

More than 11 million HTTPS websites imperiled by new decryption attack
http://arstechnica.com/security/2016/03/more-than-13-million-https-websites-imperiled-by-new-decryption-attack/

解釋:
最新的 SSL connection 攻擊:DROWN attack
https://blog.gslin.org/archives/2016/03/02/6381/


目前自己的機器好像沒受到影響,被份一下 nginx 的 HTTP 設定 (從多方搜尋來得設定值):
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA';
ssl_prefer_server_ciphers on;


若不清楚自己的 server 設定是否安全,可以透過 SSL Labs 提供的服務,來檢查是否有什麼潛在的問題。

1 則留言:

  1. 這裡有個服務,可以檢查 domain 是否有被攻擊的記錄
    https://test.drownattack.com/

    回覆刪除