CVE-2023-33242
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.51%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 1.51% probability · 73th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-74
- Affected
- lindell17 project/lindell17
- Source
- disclosures@halborn.com
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.