CAT | hacking
OS News has an interesting article: The second operating system hiding in every mobile phone
It discusses the security implications of the fact that all cell phones run two operating systems. One is the OS that you see and interact with: Android, iOS, Windows Phone, BlackBerry, etc. The other is the OS running on the baseband processor. It is responsible for everything to do with the radios in the phone, and is designed to handle all the real time processing requirements.
The baseband processor OS is generally proprietary, provided by the maker of the baseband chip, and generally not exposed to any scrutiny or review. It also contains a huge amount of historical cruft. For example, it responds to the old Hays AT command set. That was used with old modems to control dialing, answering the phone, and setting up the speed, and other parameters required to get the devices to handshake.
It turns out that if you can feed these commands to many baseband processors, you can tell them to automatically and silently answer the phone, allowing an attacker to listen in on you.
Unfortunately the security model of these things is ancient and badly broken. Cell towers are assumed to be secure, and any commands from them are trusted and executed. As we saw at Def Con in 2010, it is possible for attackers to spoof those towers.
The baseband processor, and its OS, is generally superior to the visible OS on the phone. That means that the visible OS can’t do much to secure the phone against these vulnerabilities.
There is not much you can do about this as an end user, but I thought you should know.
Infosec Institute published an article showing in detail how application signing on Android devices can be defeated.
This trick allows the attacker to modify a signed application without causing the application to fail its signature check.
The attack works by exploiting a flaw in the way signed files in the .apk zip file are installed and verified. Most zip tools don’t allow duplicate file names, but the zip standard does support it. The problem is that, when confronted by such a situation the signature verification system and the installer do different things.
The signature verifier checks the first copy of a duplicated file, but the installer actually installs the last one.
So, if the first version of a file in the archive is the real one, then the package will check as valid, but then your evil second version actually gets installed and run.
This is another example of vulnerabilities hiding in places you least expect.
Welcome to The Privacy Blog Podcast for May 2013.
In this month’s episode, I’ll discuss how shared hosting is increasingly becoming a target and platform for mass phishing attacks. Also, I’ll speak about the growing threat of Chinese hackers and some of the reasons behind the increase in online criminal activity.
Towards the end of the episode, we’ll address the hot topic of Google Glass and why there’s so much chatter regarding the privacy and security implications of this technology. In related Google news, I’ll provide my take on the recent announcement that Google is upgrading the security of their public keys and certificates.
Leave any comments or questions below. Thanks for listening!
When we hear that a company has been hacked by China what is usually meant is that the company has been hacked from a computer with a Chinese IP address. The immediate implication is that it is Chinese government sponsored.
Of course, there are many ways in which the attacks might not be from anyone in China at all. Using proxies or compromised computers as relays, would allow the attacker to be anywhere in the world while appearing to be in China. The fact that there is so much hype about Chinese government hacking right now, makes China the perfect false flag for any attacker. It sends investigators down the wrong path immediately. However, there is growing evidence that many of the attacks are actually being perpetrated by independent Chinese civilian criminal hackers out to make a buck. They are intent on stealing and selling intellectual property. The huge supply, and under employment, of computer trained people in China may be to blame. They have the skills, the time, and a need for money.
The Chinese government has also been very lax about trying to track down these individuals and generally suppress this kind of activity. The hacking activity is certainly beneficial to the Chinese economy, as the IP is generally stolen from outside China and sold to give advantage to Chinese companies. That gives a kind of covert and subtle support to the hacking activity without any actual material help or direction.
So, it is not quite government sponsored, and it IS actually Chinese. The bottom line is that it is a real problem, and a threat that is actually harder to track down and prevent because it is so amorphous.
Another from the “if the data exists, it will get compromised” file.
This article from the Washington Post talks about an interesting case of counter surveillance hacking.
In 2010, Google disclosed that Chinese hackers breached Google’s servers. What only recently came to light was that one of the things compromised was a database containing information about government requests for email records.
Former government officials speculate that they may have been looking for indications of which of their agents had been discovered. If there were records of US government requests for information on any of their agents, it would be evidence that those agents had been exposed. This would allow the Chinese to shut down operations to prevent further exposure and to get those agents out of the country before they could be picked up.
I had not thought about subpoenas and national security letters being a counter intelligence treasure trove, but it makes perfect sense.
Because Google / Gmail are so widely used, they present a huge and valuable target for attackers. Good information on almost any target is likely to live within their databases.