CVE-2021-43572

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Source

https://nvd.nist.gov/vuln/detail/CVE-2021-43572

Import Source

https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-43572.json

JSON Data

https://api.test.osv.dev/v1/vulns/CVE-2021-43572

Aliases

Published

2021-11-09T22:15:07.727Z

Modified

2025-11-14T12:34:15.478642Z

Severity

9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

[none]

Details

The 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.

References

Affected packages

Git / github.com/starkbank/ecdsa-python

Affected ranges

Type: GIT
Repo: https://github.com/starkbank/ecdsa-python
Events: Introduced

0 Unknown introduced commit / All previous commits are affected

Fixed

cb6d807a697d952916a0c46ce05ddd4d78718ca7

Fixed

d136170666e9510eb63c2572551805807bd4c17f

Affected versions

v0.*

v0.1

v0.1.0

v0.1.1

v0.1.2

v0.1.3

v0.1.4

v0.1.7

v0.1.8

v0.1.9

v1.*

v1.0.0

v1.1.0

v1.1.1

v2.*

v2.0.0

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-43572.json"