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Apple ignores VPN bug in iOS for months

#1

MichaelRSorg

MichaelRSorg

An interesting read from ProtonVPN. Basically, when an iOS VPN kicks in, it does not corral all existing threads/sockets/connections. I have seen this in other VPN contexts too. If you have a professional grade router, you should be able to monitor/log any new outgoing connection that is not destined for the VPN server.
https://protonvpn.com/blog/apple-ios-vulnerability-disclosure/
Its one thing to have a bug, and quite another thing to ignore it for months.


#2

ScruffyDan

ScruffyDan

There are pro's and cons to killing all current connections where connecting to the VPN. Many applications don't handle this very well. Slack for instance takes many minutes before it realizes that the connection it had established is no longer valid, so no new messages show up and all slack calls are dropped. Thankfully zoom almost doesn't miss a beat. But Slack is hardly alone, SSH, and file transfers both break if you connect to a VPN.

Of course there are privacy/security implications of current connections not using the VPN, but for my usage, where I need to use a VPN tp access certain resources, but find it too slow to leave it on all the time, I like the current implementation.


#3

saguaro

saguaro

TL;dr: if you're bothered, turn on VPN, then turn on Airplane Mode, pause, turn off Airplane Mode.

I wonder where the CVE for this "vulnerability" is. ProtonVPN blog says Apple addressed the issue in mid-October, but apparently not to ProtonVPN's liking. I don't hear much outrage about this elsewhere.

Turns out ProtonVPN started banging a drum about this is 13.4, last spring. Sophos has, what looks like a good analysis.

Sophos News - The Sophos Blog

The Sophos Blog
nakedsecurity.sophos.com nakedsecurity.sophos.com

@Steve just noted on SN794, Firefox had to step back from encypting all DNS traffic for valid enterprise network concerns. I wonder whether this vpn issue is related to enterprise users.


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