CVE-2023-33242 Information

Description

Crypto wallets implementing the Lindell17 TSS protocol might allow an attacker to extract the full ECDSA private key by exfiltrating a single bit in every signature attempt (256 in total) because of not adhering to the paper’s security proof’s assumption regarding handling aborts after a failed signature.

Reference

https://www.fireblocks.com/blog/lindell17-abort-vulnerability-technical-report/ https://github.com/fireblocks-labs/zengo-lindell17-exploit-poc https://eprint.iacr.org/2017/552.pdf https://github.com/fireblocks-labs/mpc-ecdsa-attacks-23