CVE-2023-33241
GG18 / GG20 TSS Beta Parameter Vulnerability
CRITICAL 9.1EPSS 1.2%
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.
- Affected
- GG TSS Implementations · Wallet
- CVSS v3.1 NVD
- 9.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - CVSS v3.1 HALBORN
- 9.6 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N - EPSS
- 1.18% chance of exploitation in the next 30 days, 67th percentile
- Published
- 2023-08-09
- Updated
- 2024-10-10
Proof-of-concept exploits (1)
- fireblocks-labs/safeheron-gg20-exploit-poc13★ · 2023-08-06
Security advisories
- https://eprint.iacr.org/2019/114.pdf
- https://eprint.iacr.org/2020/540.pdf
- https://www.fireblocks.com/blog/gg18-and-gg20-paillier-key-vulnerability-technical-report