CVE-2019-14859: Improper Verification of Cryptographic Signature in Pure-Python ECDSA
CVE-2019-14859 · Severity: low · CVSS 3.1 · Published 2020-01-02
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.
No. Junglewise Threat Intelligence has no report of CVE-2019-14859 being exploited in the wild.
How severe is CVE-2019-14859?
Low severity, with a CVSS score of 3.1, published 2 January 2020.
Which products and versions are affected?
ecdsa (PyPI) ECOSYSTEM:introduced=0,fixed=0.13.3.
Is there a fix for CVE-2019-14859?
Yes. ecdsa (PyPI): upgrade to 0.13.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2019-14859?
Check whether you run ecdsa (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.