Ledger to Solve Bitcoin Cash Issue

At the beginning of the week, many Ledger users faced issues with Bitcoin Cash on their wallets
11 April 2018   1485

Since the beginning of this week, many users of Ledger wallets began to report difficulties with access to their Bitcoin Cash assets. Problems arise when opening BCH wallets, checking balance or making transactions.

After ~20 hours, this issue is still not resolved. I can't access my BCH wallet at all (no transactions show up, despite being visible on an explorer). Also, the proposed solution of Electron Cash is buggy, slow and crashes every time I start up my ledger.
 

unknown9_ at Reddit

This what Ledger team reported on the issue.

 The new version of Bitcoin-ABC (Bitcoin Cash node) breaks compatibility with our parser. As a result balances shown on the Ledger Wallet are incorrect. Our engineering team is currently working on a fix.
 

Ledger Team

In subsequent updates, it was reported that the team had to transfer all 746 GB of blockchain data and resync the network. Subsequently, the process was delayed and the programmers had to optimize it.

As they say in the last message,"We had confirmation that BCH was now working and displaying the correct balance." and the team is working on "deploying the patches on our remaining BCH servers."

Ledger to Discover HSM Vulnerability

HSM is an external device designed to store public and private keys used to generate digital signatures and to encrypt data, used by banks, exchanges, etc
10 June 2019   1279

A group of researchers from Ledger identified several vulnerabilities in the Hardware Security Module (HSM) devices, which can be used to extract keys or perform a remote attack to replace the firmware of an HSM device. The problem report is currently available only in French, the English-language report is scheduled to be published in August during the Blackhat USA 2019 conference. HSM is a specialized external device designed to store public and private keys used to generate digital signatures and to encrypt data.

HSM allows you to significantly increase protection, as it completely isolates keys from the system and applications, only by providing an API to perform basic cryptographic primitives implemented on the device side. Typically, HSM is used in areas where you need to provide the highest protection, for example, in banks, cryptocurrency exchanges, certification centers for checking and generating certificates and digital signatures.

The proposed attack methods allow an unauthenticated user to gain complete control over the contents of the HSM, including extracting all the cryptographic keys and administrative credentials stored on the device. The problems are caused by a buffer overflow in the internal PKCS # 11 command handler and an error in the implementation of the cryptographic protection of the firmware, which bypasses the firmware check using the PKCS # 1v1.5 digital signature and initiates loading the own firmware in the HSM.

The name of the manufacturer, the HSM devices of which have vulnerabilities, has not yet been disclosed, but it is argued that the problem devices are used by some large banks and cloud service providers. At the same time it is reported that information about the problems was previously sent to the manufacturer and it has already eliminated vulnerabilities in the fresh firmware update. Independent researchers suggest that the problem may be in the devices of the company Gemalto, which in May released an update to Sentinel LDK with the elimination of vulnerabilities, access to information about which is still closed.