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Date: Mon, 04 Dec 2017 08:22:49 +0000
From: "Mark Wadham" <>
Subject: [FD] CVE-2017-16895 Local root privesc in Arq Backup <= 5.9.7

As well as the other bugs affecting Arq <= 5.9.6 there is also another 
with the suid-root restorer binaries in Arq for Mac. There are three of 
and they are used to execute restores of backed up files from the 
cloud providers.

After reversing the inter-app protocol I discovered that the path to the
restorer binary was specified as part of the data packet sent by the UI. 
receiving this, the restorer binaries then set +s and root ownership on 
path. This means we can specify an arbitrary path which will receive +s 
and root

This issue is fixed in Arq 5.10.


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