userpref.c in libimobiledevice 1.1.4, when $HOME and $XDG_CONFIG_HOME are not set, allows local users to overwrite arbitrary files via a symlink attack on (1) HostCertificate.pem, (2) HostPrivateKey.pem, (3) libimobiledevicerc, (4) RootCertificate.pem, or (5) RootPrivateKey.pem in /tmp/root/.config/libimobiledevice/.
http://www.ubuntu.com/usn/USN-1927-1
http://www.openwall.com/lists/oss-security/2013/06/04/11
http://libiphone.lighthouseapp.com/projects/27916-libiphone/tickets/331-insecure-tmp-directory-use