CVE-2021-43571

The verify function in the Stark Bank Node.js ECDSA library (ecdsa-node) 1.1.2 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

CVSS v3.1 NVD

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

CVSS v2.0 NVD

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

1.03% chance of exploitation in the next 30 days, 63rd percentile

Published

2021-11-09

Updated

2024-08-04

Proof-of-concept exploits (1)

• https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-i…

Security advisories

• starkbank/ecdsa-node/releases/tag/v1.1.3
• https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-i…
• advisories/GHSA-q9q6-f556-gpm7

References

• CVE Record
• NVD entry