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.

Related CPE's

a

gg18_project

gg18

-

Vulnerable

a

gg20_project

gg20

-

Vulnerable

References

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

ExploitThird Party Advisory

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

ExploitThird Party Advisory

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

Exploit

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

Exploit

https://www.fireblocks.com/blog/gg18-and-gg20-paillier-key-vulnerability-technical-report/

Third Party Advisory

Weaknesses

[email protected]

Primary
CWE-74

CVSS impact metrics

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

9.1 · Critical

  • CVSS V3.1

  • CVSS V3.0

  • CVSS V2.0

Information

Source identifier

[email protected]

Vulnerability status

Analyzed

Published

2023-08-09T22:15:10.323

11 months ago

Last modified

2023-08-25T16:14:33.433

11 months ago