Most users
of the iPhone are completely unaware that Apple has assigned their individual
devices a
Unique
Device Identifier (UDID).
While such
an identifier contains numerous privacy implications, it was not until recently
that the general public became acutely aware of these UDIDs.
In a post on Pastebin, on September 4, 2012,
the hacker group AntiSec announced that
they
had obtained a file containing over
twelve
million Apple UDIDs from a FBI laptop.
While
the FBI quickly denied this, stating that the laptop was not hacked and
that the FBI did not hold such a file, this event led to several articles by
numerous tech and law blogs diving into the topic of UDIDs and what these
identifiers actually means for iPod Touch, iPhone and iPad users.
(In addition, it is possible that non-Apple
devices also contain a similar identifier to the UDID and the public has not
been made aware of this yet.)
In a recent article posted on CNET, Frank Heidt, chief
executive of Leviathan Security claimed that with a UDID, a push token, and a
device name, an attacker "could arbitrarily load an app on your
phone." But Alex Radocea, a senior engineer at CrowdStrike, says that’s
not true.
"There’s been a lot of misinformation,"
Radocea told The Verge over the phone. Just as AntiSec released their list of
device IDs, he and his team posted the results of their examination of the iOS
version of FinSpy Mobile, a strain of the infamous FinFisher spyware that was
recently found targeting political dissidents.
In their report, CrowdStrike points out that the
spyware is using ad-hoc distribution, a method usually reserved for testing
which uses UDIDs to bypass Apple’s application signing process. But that
doesn’t mean that a UDID is the magic bullet for remotely installing malware on
a device without the user’s knowledge, Radocea says.
"The main thing is that user interaction is
required to install these applications," he clarified. "They cannot
be silently or arbitrarily installed, as the CNET article alleges." In a
blog post written shortly after news hit of AntiSec’s release, the ACLU
similarly suggested that UDIDs could be used to secretly infect devices with
the spyware.
Kopstein goes on to further discuss how in
the past UDIDs have been used to access the geographic information of an
individual user. In addition, the UDID
is solely in the control of Apple, and the only way for an individual to get a
new UDID is to get a new iPod Touch, iPhone or iPad.
What exactly the release of these 12 million
UDID truly means is still unclear, but if nothing else, this release has raised
public awareness of the issue. (
There is also a large concern over whether or
not the FBI actually had these 12 million UDIDs, what the FBI was doing with
this data, and if they truly did have the file, why was it being stored on a laptop that was so easily hacked?) And, as discussed earlier, Apple is
removing the UDID from the newest version of its operating system. However, the fact remains that millions of iPod
Touches, iPhones and iPads contain a unique identifier over which the user has
no control and which can do uncertain things to a user’s personal device
Via The
Verge
(Written by Brett Alazraki, Fall 2012 IBLT Entrepreneurship Assistance Fellow)