GHSA-r28h-x6hv-2fq3

Improper Verification of Cryptographic Signature in starkbank-ecdsa

Source: GitHub Advisory Database (reviewed) Critical CVE-2021-43570

Packages

Ecosystem	Package	Affected	Fixed in
Maven	com.starkbank.ellipticcurve:starkbank-ecdsa	< 1.0.1	1.0.1

Details

As written in the advisory (Markdown source, shown as plain text).

The verify function in the Stark Bank Java ECDSA library (ecdsa-java) 1.0.0 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

References

External links from the advisory. They lead to third-party sites.

https://nvd.nist.gov/vuln/detail/CVE-2021-43570 advisory
https://github.com/starkbank/ecdsa-java/pull/16 web
https://github.com/starkbank/ecdsa-java/commit/ed22e484186d6c66d3686bfe39d01bdbabf219b6 web
https://github.com/starkbank/ecdsa-java package
https://github.com/starkbank/ecdsa-java/releases/tag/v1.0.1 web
https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries web