CVE-2021-43572

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Summary

CVECVE-2021-43572
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-11-09 22:15:00 UTC
Updated2022-03-24 15:57:00 UTC
DescriptionThe verify function in the Stark Bank Python ECDSA library (aka starkbank-escada or ecdsa-python) before 2.0.1 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

Risk And Classification

Problem Types: CWE-347

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Starkbank Ecdsa-python All All All All
Application Starkbank Ecdsa-python 2.0.0 All All All

References

ReferenceSourceLinkTags
Technical Advisory – Arbitrary Signature Forgery in Stark Bank ECDSA Libraries (CVE-2021-43572, CVE-2021-43570, CVE-2021-43569, CVE-2021-43568, CVE-2021-43571) – NCC Group Research MISC research.nccgroup.com
Release v2.0.1 · starkbank/ecdsa-python · GitHub MISC github.com
Add signature.r and signature.s range check · starkbank/ecdsa-python@d136170 · GitHub MISC github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 980154 Python (pip) Security Update for starkbank-ecdsa (GHSA-92vm-mxjf-jqf3)

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