OneKey reproduces transaction replacement attack on old version of Ledger

The in-house security team at open-source wallet provider OneKey said it successfully reproduced an exploit targeting an outdated version of Ledger’s on-device Ethereum application in a test environment.

Ledger said exploiting the vulnerability required control over communications between the device and its host, such as through malware, compromised wallet software or a hostile webpage. Ledger added app-level safeguards with Ethereum app 1.22.2 released on Aug. 13, before fixing the underlying issue in Secure SDK 26.6.1 on Aug. 21.

The security test follows the Coldcard exploit in July, when attackers exploited a firmware bug introduced in March 2021 that weakened seed randomness on some Coldcard wallets, leaving the resulting private keys vulnerable to brute-force attacks.

The vulnerability reproduced by OneKey is unrelated to seed generation and instead affects how transactions are handled during the signing process.

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