Trezor's Bridge New Version Released

Updates are being introduced as part of the gradual transition of the service from Google Chrome extensions to full-fledged software
20 February 2018   700

Developers of the Trezor hardware wallet presented a new version of the Bridge software that provides a connection between the Internet browser and the wallet itself. According to them, Bridge application was rewritten from scratch on the basis of modernized program code, which will make the connection "faster, safer and more reliable".

Updates are being introduced as part of the gradual transition of the service from Google Chrome extensions to full-fledged software. Existing users can still use the browser extension or the previous version of Bridge. At this stage, the transition to new software will be carried out exclusively on a voluntary basis.

New users will be offered two options - to install a new version of Bridge or the extension of Google Chrome, but in Trezor recommend the first option. As soon as the transition becomes mandatory, all users will be notified.

In the coming weeks, the next stage of the process will begin: in the new version of the Trezor Wallet software, the option of expanding Google Chrome will be absent. Only those who installed it earlier can use it, however Trezor will continue to remind such users about the possibility of installing the Bridge software.

Ledger to Report on Trezor Vulnerabilities

As reported, the security research by the Attack Lab found 5 serious vulnerabilities 
12 March 2019   176

The leading manufacturer of cryptocurrency hardware wallets Ledger spoke about the vulnerabilities identified in the devices of his direct competitor Trezor. This is stated in a message distributed by the French company on Monday, March 11.

The Ledger study states that the vulnerabilities were discovered by employees of Attack Lab, a division of the company, which, to increase security, hacks both own wallets and competitors' devices. Representatives of Ledger claim that they have repeatedly contacted Trezor regarding the weak points in their Trezor One and Trezor T wallets, and after the disclosure period ended, they decided to make them public.

The first problem is related to authenticity of devices. As Ledger claims, the Trezor device can be simulated by hacking it with malware, and then resealing it in a box, forging a sticker designed to protect against unauthorized access. The latter, said the French company, is easy to remove. It is also claimed that this vulnerability can be eliminated only by reformatting the entire design of Trezor wallets, in particular, by replacing one of the main components with the Secure Secure chip.

Secondly, Ledger hackers were able to pick up a PIN on a Trezor wallet using an attack on a third-party channel. Later, Trezor solved this problem in its firmware update 1.8.0.

The third and fourth vulnerabilities, which Ledger also proposes to eliminate by replacing the main component with the Secure Element chip, are the possibility of stealing confidential data from the device. Ledger claims that an attacker with physical access to Trezor One and Trezor T can extract all data from flash memory and gain control over the assets stored on devices.

The last discovered weakness is also related to the Trezor security model: as stated by Ledger, the Trezor One cryptographic library does not contain adequate countermeasures against hardware attacks. It is alleged that a hacker with physical access to the device can extract the secret key through an attack on a third-party channel, although Trezor claimed that his wallets are resistant to such an attack.

It is noteworthy that in November 2018 Trezor representatives themselves warned that an unknown third party was distributing individual copies of their flagship device, Trezor One, urging users to buy wallets only through their official website.

However, in its report, Ledger claims that users cannot be sure, even if they buy equipment on the Trezor website. An attacker can buy multiple devices, hack them, and then send them back to the manufacturer for compensation. Ledger researchers conclude that if a compromised device is resold, user cryptocurrencies may be stolen.

There's no comment from Trezor team yet.