Crypto wallets implementing the GG18 or GG20 TSS protocol might allow an attacker to extract a full ECDSA private key by injecting a malicious pallier key and cheating in the range proof. Depending on the Beta parameters chosen in the protocol implementation, the attack might require 16 signatures or more fully exfiltrate the other parties' private key shares.
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
| Link | Tags |
|---|---|
| https://www.fireblocks.com/blog/gg18-and-gg20-paillier-key-vulnerability-technical-report/ | third party advisory |
| https://github.com/fireblocks-labs/mpc-ecdsa-attacks-23 | exploit |
| https://github.com/fireblocks-labs/safeheron-gg20-exploit-poc | exploit |
| https://eprint.iacr.org/2019/114.pdf | third party advisory exploit |
| https://eprint.iacr.org/2020/540.pdf | third party advisory exploit |