iOS 阻擋 WoSign 憑證

mozilla.dev.security.policy 上看到有人行動了:「Apple's response to the WoSign incidents」。這使得 Apple 成為 WoSign 事件中第一個行動的單位。

Apple 這次先把 WoSign 放入 iOS 憑證清單的黑名單公告在這邊:「Blocking Trust for WoSign CA Free SSL Certificate G2」。

WoSign 在 iOS 產品線中是靠 StartComComodo 的交叉簽章,所以如果 Apple 只想擋 WoSign 憑證的話,必須以阻擋 Intermediate CA 的方式避開:

Although no WoSign root is in the list of Apple trusted roots, this intermediate CA used cross-signed certificate relationships with StartCom and Comodo to establish trust on Apple products.

不過為了降低對 user 的影響,這次的阻擋會有例外。當 CT log server 在 2016-09-19 前收到的 SSL certificate 還是會信任 (要注意的重點是,這邊的日期不是簽發,是送到 CT log server 上):

To avoid disruption to existing WoSign certificate holders and to allow their transition to trusted roots, Apple products will trust individual existing certificates issued from this intermediate CA and published to public Certificate Transparency log servers by 2016-09-19.

接下來會開始更深入的調查 WoSign 與 StartCom:

As the investigation progresses, we will take further action on WoSign/StartCom trust anchors in Apple products as needed to protect users.

另外本來的棚子裡,Qihoo 360 與 StartCom 正式提出要求在 2016/10/04 與 Mozilla 的人面對面討論 (在英國):「WoSign and StartCom: next steps」:

Following the publication of the recent investigative report, representatives of Qihoo 360 and StartCom have requested a face-to-face meeting with Mozilla. We have accepted, and that meeting will take place next Tuesday in London.

繼續來看進度... 下個禮拜應該會有更多的資料出來。

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