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PYSEC-2020-163
Quick fix
PYSEC-2020-163 — ecdsa: upgrade to the fixed version with the command below.
pip install --upgrade 'ecdsa>=0.13.3'Details
A flaw was found in all python-ecdsa versions before 0.13.3, where it did not correctly verify whether signatures used DER encoding. Without this verification, a malformed signature could be accepted, making the signature malleable. Without proper verification, an attacker could use a malleable signature to create false transactions.
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14859[REPORT]
- https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3[WEB]
- https://github.com/warner/python-ecdsa/issues/114[REPORT]
- https://pypi.org/project/ecdsa/0.13.3/[PACKAGE]
- https://github.com/advisories/GHSA-8qxj-f9rh-9fg2[ADVISORY]