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CVE-2023-33241

9.6 · CRITICAL

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.

Published Aug 9, 2023CWE-74EPSS 1.18%

Overview

CVE-2023-33241 is a critical-severity vulnerability. It was published on August 9, 2023 and has a CVSS 3.1 base score of 9.6 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.6, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refeprint.iacr.org/2019/114.pdfRefeprint.iacr.org/2020/540.pdfGitHubgithub.com/fireblocks-labs/mpc-ecdsa-attacks-23GitHubgithub.com/fireblocks-labs/safeheron-gg20-exploit-pocRefwww.fireblocks.com/blog/gg18-and-gg20-paillier-key-vulnerability-technical-report/Refeprint.iacr.org/2019/114.pdfRefeprint.iacr.org/2020/540.pdfGitHubgithub.com/fireblocks-labs/mpc-ecdsa-attacks-23GitHubgithub.com/fireblocks-labs/safeheron-gg20-exploit-pocRefwww.fireblocks.com/blog/gg18-and-gg20-paillier-key-vulnerability-technical-report/

How CyberStrike helps

Frequently asked questions

What is CVE-2023-33241?

CVE-2023-33241 is a critical-severity vulnerability. It was published on August 9, 2023 and has a CVSS 3.1 base score of 9.6 (CRITICAL).

How severe is CVE-2023-33241?

This vulnerability has a CVSS 3.1 base score of 9.6, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-33241?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-33241?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-33241 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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