从全屏退出来后，后置摄像头被激活。
脸书频现网络安全隐患似乎已经算不上是大新闻了，不过最近网友爆料的有关摄像头的bug还是让不少人担心起来。
图 via VCG
Recently, several Facebook users noticed the app is opening the camera while they're scrolling through their feeds. Many of them took to platforms like Twitter and Reddit to report their findings.
最近，多名脸书用户注意到，当他们使用app时，摄像头被启动了。很多人在推特和Reddit等平台上爆料了。
A common description of the problem seems to be that the app opens up the camera mode while users watch videos or are looking at the newsfeed. Some experience the issue when they switch to fullscreen mode, which seems to call the camera view on the screen for a brief moment.
这一问题最常见的情形是，当用户观看视频或查看新闻提要时，该应用程序会打开相机模式。一些人在切换到全屏模式时遇到这个问题，屏幕上会短暂地出现相机视图。
▲ iPhone bug shows Facebook app accessing the camera while scrolling through videos and the newsfeed (via techspot)
最早爆料这个问题的是一个网页设计公司的负责人Joshua Maddux。发布的视频显示，他点开了一个用户的头像，然后在关闭的时候发现后置摄像头启动了。
发现脸书一个安全和隐私的问题。使用App期间它会积极调用摄像头。我在App里发现一个bug，在你浏览时还能看到摄像头也在开着。注意，我的镜头对着地毯。
不少网友跟帖表示他们也遇到同样的问题。
Thanks for pointing that out. Can also confirm on my phone. Seems like a bug but equally, I’ve seen the ads sometimes be tailored to things I’ve said rather than having searched for / looked at. If camera and mic are live that would explain that.
谢谢你的爆料。我手机上一样。看起来是个bug，不过同时，我发现我这儿的广告有时是根据我说过的东西量身定制的，而不是搜索或看过的。要是摄像头和麦克风都开着，就能说得通了。
I noticed mine doing it too.... I turned off access to the camera but I may have to delete the app. This is creepy
我注意到我手机上也是这样...我关了访问摄像头的权限，但可能还是得删掉它。这真的太恐怖了。
Maddux进一步提醒道，说不定前置摄像头也被悄悄启动了。
It's how @facebook accesses your camera and microphone... This is proof that they are accessing your back camera. They may also be accessing the front camera. If they process that through a facial recognition they could see your actual reaction to posts.
@Facebook就是这样访问你们相机和麦克风的。这只是他们正在访问后置摄像头的证据。他们可能也在访问前置摄像头。如果用面部识别技术处理一下(前置摄像头)获取到的信息，他们就可以看到你对帖子的实际反应。
有网友说想测一下自己手机上的脸书有没有这个漏洞，突然意识到已经很久不用它了。
I was going to try this for myself but then I remembered that I don’t use the app anymore.
我刚想自己测一下，又想起来我早都不用这个app了。
不过有工程师成功复现并证实了这个漏洞。
Jerry Gamblin, principal security engineer at Kenna Security, was able to replicate the bug and told CNN "there is no indication that the data actually is transmitted to Facebook."
肯纳安保公司的首席安全工程师杰里⋅甘布林复现了这个漏洞，不过他向CNN表示：“没有迹象表明这些数据实际上被传输给了脸书。”
