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CVE-2023-33242

9.6 · CRITICAL

Crypto wallets implementing the Lindell17 TSS protocol might allow an attacker to extract the full ECDSA private key by exfiltrating a single bit in every signature attempt (256 in total) because o…

Published Aug 9, 2023CWE-74EPSS 1.51%

Overview

CVE-2023-33242 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 Lindell17 TSS protocol might allow an attacker to extract the full ECDSA private key by exfiltrating a single bit in every signature attempt (256 in total) because of not adhering to the paper's security proof's assumption regarding handling aborts after a failed signature.

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/2017/552.pdfGitHubgithub.com/fireblocks-labs/mpc-ecdsa-attacks-23GitHubgithub.com/fireblocks-labs/zengo-lindell17-exploit-pocRefwww.fireblocks.com/blog/lindell17-abort-vulnerability-technical-report/Refeprint.iacr.org/2017/552.pdfGitHubgithub.com/fireblocks-labs/mpc-ecdsa-attacks-23GitHubgithub.com/fireblocks-labs/zengo-lindell17-exploit-pocRefwww.fireblocks.com/blog/lindell17-abort-vulnerability-technical-report/

How CyberStrike helps

Frequently asked questions

What is CVE-2023-33242?

CVE-2023-33242 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-2023-33242?

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-2023-33242?

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-2023-33242?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-33242 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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