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CVE-2023-33241

Published: Aug 9, 2023

Modified: Oct 10, 2024

PUBLISHED

CVSS v3.1

9.6

CRITICAL

Description

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.

Vendor	Product	Versions
GG TSS Implementations	Wallet	affected `18` affected `20`

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/gg18-and-gg20-paillier-key-vulnerability-technical-report/

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

https://github.com/fireblocks-labs/safeheron-gg20-exploit-poc

https://eprint.iacr.org/2019/114.pdf

https://eprint.iacr.org/2020/540.pdf

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