The Privacy BlogPrivacy, Security, Cryptography, and Anonymity

CAT | Security Breaches

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Dark Hotel hall

Kaspersky recently announced the discovery of a new Advanced Persistent Threat (APT) that they are calling DarkHotel. This is in the fine tradition of giving all newly discovered hackers or vulnerabilities clever and evil sounding names. In this case they have found something quite interesting.

For the last 7 years a group has been systematically targeting executives and government officials staying at high end hotels. They hack their computers and grab their files, sniff their keyboards, and install virus that can then spread within the victim’s organization. (more…)

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sudo make me a sandwich

https://xkcd.com/149/

Security researcher Emil Kvarnhammar of TrueSec announced the discovery of a new vulnerability in Mac OS X from 10.8.5 though the current 10.10.

The attack is against a unix utility called “sudo” which allows commands to run as the “root” user (which has absolute power on the system). Normally a user with admin privileges needs to type in their password and approve the running of these tasks, but this attack bypasses the user authentication step.

They have not released details on the vulnerability to give Apple time to issue a fix. In the mean time, it looks like you can protect yourself by making your your normal account is not an admin account. (more…)

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Oct/14

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Two new attacks on Tor

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Tor webpage

Two new attacks on Tor were recently announced.

The first involves using an exit node to automatically modify software patches to include malware. This one is being seen in the wild already. (more…)

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USB connectorA couple of months ago researcher Karsten Nohl demonstrated a security vulnerability that he called BadUSB. Basically it was a demonstration that an attacker could alter the firmware in a USB device to automatically attack anything it was plugged in to. At the recent DerbyCon, researchers Adam Caudill and Brandon Wilson demonstrated their version of the attack and released sample code for how to implement it. This really opens pandora’s box.

The problem here is that this is not actually a bug in USB. It is exactly how USB is designed to work (as insecure as that might be), and changing that behavior is likely to break a lot of other things. A good and effective fix for this vulnerability is probably years away.

In the mean time, take great care with USB devices. My suggestion is to never use another person’s USB device. Don’t use USB to transfer files, and make sure that any USB devices you do use are obtained directly in unopened packaging. There could still be exploits introduced in manufacturing, but at least you are as safe as reasonably possible.

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Lance Cottrell is the Founder and Chief Scientist of Anonymizer. Follow me on Facebook, Twitter, and Google+.

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HiRes

The Internet is on fire with discussions of the recent release of stolen nude photos of over 100 female celebrities. This is a massive invasion of their privacy, and it says something sad about our society that there is an active market for such pictures. While this particular attack was against the famous, most of us have information in the cloud that we would like to stay secret.

While there is not a definitive explanation of the breach the current consensus is that it was probably caused by a vulnerability in Apple’s “Find My iPhone” feature. Apparently the API interface to this service did not check for multiple password failures, a standard security practice. This allowed attackers to test effectively unlimited numbers of passwords for each of the accounts they wanted to access.

Because most people use relatively weak passwords, this attack is quite effective. Once they gained access to the accounts, they could sync down photos or any other information stored in iCloud.

Of course, the first rule of secrecy is: If it does not exist, it can’t be discovered.

If you do want to create something that you would be pained to see released publicly, then make sure you keep close control of it. Store it locally, and encrypted.

Wherever you keep it, make sure it has a strong password. Advice for strong passwords has changed over time because of the increasing speed of computers. It used to be that fancy pneumonics would do the trick but now the fundamental truth is: if you can remember it, it is too weak.

This is particularly true because you need to be using completely different passwords for every website. Changing a good password in a simple obvious way for every website is obvious. It might prevent brute force attacks but if some other attack gives access to your password, the attacker will be able to easily guess your password on all other websites.

You need to be using a password manager like 1Password (Mac), LastPass, Dashlane, etc. Let the password manager generate your passwords for you. This is what a good password should look like: wL?7mpEyfpqs#kt9ZKVvR

Obviously I am never going to remember that, but I don’t try. I have one good password that I have taken the time to memorize, and it unlocks the password manager which has everything else.

UPDATE: There appears to be some question about whether this vulnerability is actually to blame.

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