A libusbmuxd security update has been released for Debian GNU/Linux 8 LTS to address incorrectly handled socket permissions.

Package : libusbmuxd
Version : 1.0.9-1+deb8u1
CVE ID : CVE-2016-5104
Debian Bug : 825554

It was discovered that libusbmuxd incorrectly handled socket
permissions. A remote attacker could use this issue to access
services on iOS devices, contrary to expectations.

For Debian 8 "Jessie", this problem has been fixed in version
1.0.9-1+deb8u1.

We recommend that you upgrade your libusbmuxd packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS