by Kastro
Paper/Archive/CVE-2023-33241

CVE-2023-33241

GG TSS Implementations Wallet — GG18 / GG20 TSS Beta Parameter Vulnerability

EPSS 1%CVSS 9.6
critical.is priorityof 100
42
CVSS 9.6 (CNA)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 67.8.678 × 2013.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
Wallet18–CNA
Wallet20–CNA

Scores by source

Halborn (CNA)9.6CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

reffireblocks.com/blog/gg18-and-gg20-paillier-key-vulnerability-technical-reportrefgithub.com/fireblocks-labs/mpc-ecdsa-attacks-23refgithub.com/fireblocks-labs/safeheron-gg20-exploit-pocrefeprint.iacr.org/2019/114.pdfrefeprint.iacr.org/2020/540.pdf