CVE-2023-33242

Published: 09/08/2023 Updated: 25/08/2023

CVSS v3 Base Score: 8.1 | Impact Score: 5.2 | Exploitability Score: 2.8

VMScore: 0

Crypto wallets implementing the Lindell17 TSS protocol might allow an malicious user 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.

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# Server Abort Error on KillSwitch Event Compromises ECDSA Key Signatures Leaking Bits of ECDSA Keys By Spacebot23 -spacebot@wearhackeronecom Copyright 2024 © Dwayne Hans All Rights Reserved Table of Content I The What - Details of vulnerability in a nutshell II The Where - Components/users affected III The When - Exploit and PoC IV The Why - Reason why the

CVE-2023-33242 PoC

CVE-2023-33242 CVE-2023-33242 PoC The simulated Lindell17 protocol is vulnerable to a bit extraction exploit, allowing an attacker to recover the private key by iteratively extracting individual bits of the key The protocol is designed to generate ECDSA signatures in a client-server model, with each party holding a share of the ECDSA secret key The vulnerability lies in the

CWE-74 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 https://nvd.nist.gov https://github.com/dcar2121/Acme https://github.com/d0rb/CVE-2023-33242

CVE-2023-33242

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