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Possible DNS leak in SailfishOS 2.0

asked 2016-01-20 11:53:14 +0300

dazo gravatar image

After upgrading to SailfishOS 2.0 I noticed that the DNS cache is not flushed when chaning networks.

This was noticed In networks which use split-view. For example server.example.com may resolve to 7.7.7.7 when connected to the Internet via mobile network (2G/3G/4G). While on a local WLAN it may resolve to 192.168.7.7.

When changing connection from mobile network to WLAN the public IP address is resolved regardless of what the internal DNS server provides.

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answered 2016-01-20 23:29:49 +0300

tigeli gravatar image

I don't think the cache should be flushed when the network is switched to another. You should make sure that you use low enough TTL for your DNS records.

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Asked: 2016-01-20 11:53:14 +0300

Seen: 584 times

Last updated: Jan 20 '16