Ledger to Report on XMR App Bug in Nano S Wallet

Do not use Ledger Nano S with client 0.14 until more information is provided, official message says
04 March 2019   670

The manufacturer of the popular hardware cryptocurrency wallets Ledger reported on the appearance of the alleged bug when using the Monero version 0.14 client with the company's own version 1.1.3 client.

In the last version of monero client 0.14 with application 1.1.3, it seems there is a bug with the change address: The change seems to not be correctly send.

Do not use Ledger Nano S with client 0.14 until more information is provided.
 

Ledger Crypto Dev @reddit

As noted by Ledger, the initial tests showed that an undesirable effect is a combination of a specific client version with a specific version of the wallet application. At the same time, users who will not conduct transactions with supposedly vulnerable software risk nothing.

Last week, information was disclosed about the vulnerability of Ledger devices related to addresses for returning coins, but in that case the problem affected Bitcoin wallets.

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   1123

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.