CVE-2023-33242

Lindell17 TSS Abort Mishandling

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.

Affected

Lindell TSS Implementations · Wallet

CVSS v3.1 NVD

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

CVSS v3.1 HALBORN

9.6 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

EPSS

1.51% chance of exploitation in the next 30 days, 74th percentile

Published

2023-08-09

Updated

2024-10-10

Proof-of-concept exploits (2)

• fireblocks-labs/zengo-lindell17-exploit-poc8★ · 2023-08-06
• d0rb/CVE-2023-332424★ · 2023-08-15

Security advisories

• https://eprint.iacr.org/2017/552.pdf
• https://www.fireblocks.com/blog/lindell17-abort-vulnerability-technical-report

References

• CVE Record
• NVD entry

Related

• CVE-2023-33241
• CVE-2021-34527
• CVE-2021-3773
• CVE-2023-26469
• CVE-2023-2916
• CVE-2023-30943