CVE-2019-14859

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-01-02 · updated 2026-06-17
Weakness: CWE-347

Description

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.

Affected products

[UNKNOWN] python-ecdsa: before 0.13.3 — fixed in 0.13.3
Red Hat Ceph Storage: 2.0, 3.0
OpenStack: 10, 13, 14, 15
RedHat Virtualization: 4.0

How to fix

Upgrade to a fixed version: [UNKNOWN] python-ecdsa 0.13.3. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14859
https://github.com/warner/python-ecdsa/issues/114
https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3
https://pypi.org/project/ecdsa/0.13.3/
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14859
https://github.com/warner/python-ecdsa/issues/114
https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3
https://pypi.org/project/ecdsa/0.13.3/

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