CVE-2023-33241

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.

• CWE-74

• https://eprint.iacr.org/2019/114.pdfExploit, Third Party Advisory
• https://eprint.iacr.org/2020/540.pdfExploit, Third Party Advisory
• https://github.com/fireblocks-labs/mpc-ecdsa-attacks-23Exploit
• https://github.com/fireblocks-labs/safeheron-gg20-exploit-pocExploit
• https://www.fireblocks.com/blog/gg18-and-gg20-paillier-key-vulnerability-technical-report/Third Party Advisory
• https://eprint.iacr.org/2019/114.pdfExploit, Third Party Advisory
• https://eprint.iacr.org/2020/540.pdfExploit, Third Party Advisory
• https://github.com/fireblocks-labs/mpc-ecdsa-attacks-23Exploit
• https://github.com/fireblocks-labs/safeheron-gg20-exploit-pocExploit
• https://www.fireblocks.com/blog/gg18-and-gg20-paillier-key-vulnerability-technical-report/Third Party Advisory

Published

Aug 9, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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