Question 1

Who is affected by the Zilliqa Ledger vulnerability?

Accepted Answer

Only users who signed native, non-EVM ZIL transactions with a Ledger device face risk. Holders who move ZIL exclusively through EVM-compatible tooling, along with the Zilliqa SDKs, are not affected.

Question 2

How could attackers steal private keys from the bug?

Accepted Answer

The Ledger app copied the wrong 32 bytes from a 40-byte value. That fixed the top 64 bits of each signing nonce at zero, and the lost randomness let an attacker reconstruct a private key from about five or more affected signatures using public on-chain data.

Question 3

When did Zilliqa detect the exploitation?

Accepted Answer

Zilliqa said it observed on-chain activity consistent with active exploitation on July 19. It isolated the root cause on July 21, then disclosed the vulnerability publicly on July 22. The project credited KuCoin for confirming the attack.

Zilliqa

Zilliqa halts native ZIL transactions over 2019 Ledger key leak bug

One sharp brief.
Every day.

Zilliqa

Zilliqa halts native ZIL transactions over 2019 Ledger key leak bug

One sharp brief.Every day.

One sharp brief.
Every day.