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CVE-2023-33242

Published: Aug 9, 2023

Modified: Oct 10, 2024

PUBLISHED

CVSS v3.1

9.6

CRITICAL

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.

Vendor	Product	Versions
Lindell TSS Implementations	Wallet	affected `17`

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

References

https://www.fireblocks.com/blog/lindell17-abort-vulnerability-technical-report/

https://github.com/fireblocks-labs/mpc-ecdsa-attacks-23

https://github.com/fireblocks-labs/zengo-lindell17-exploit-poc

https://eprint.iacr.org/2017/552.pdf

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