CVE-2023-33242

Name: CVE-2023-33242
Creator: NVD / NIST
Published: 2023-08-09T22:15:11.18+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 1.09%

Last modified Jun 17, 2026

CVE-2023-33242 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 1.09% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

1.09%

61.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-74

Affected Software

Vendor	Product	Versions
Lindell17 Project	Lindell17	All versions

References

https://eprint.iacr.org/2017/552.pdfExploit, Third Party Advisory
https://github.com/fireblocks-labs/mpc-ecdsa-attacks-23Exploit
https://github.com/fireblocks-labs/zengo-lindell17-exploit-pocExploit
https://www.fireblocks.com/blog/lindell17-abort-vulnerability-technical-report/Third Party Advisory
https://eprint.iacr.org/2017/552.pdfExploit, Third Party Advisory
https://github.com/fireblocks-labs/mpc-ecdsa-attacks-23Exploit
https://github.com/fireblocks-labs/zengo-lindell17-exploit-pocExploit
https://www.fireblocks.com/blog/lindell17-abort-vulnerability-technical-report/Third Party Advisory

Timeline

Published: Aug 9, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-33242?

How severe is CVE-2023-33242?

CVE-2023-33242 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.09% probability of exploitation in the next 30 days.

How do I fix CVE-2023-33242?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-33242?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST