CVE-2019-14859

moderate-risk
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.

Do I need to act?

-
0.07% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.1/10 Critical
NETWORK / LOW complexity

Affected Products (8)

Python-Ecdsa

Affected Vendors

Redhat Python-Ecdsa Project

References (8)

Exploit https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14859
Exploit https://github.com/warner/python-ecdsa/issues/114
Release Notes https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3
Release Notes https://pypi.org/project/ecdsa/0.13.3/
Exploit https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14859
Exploit https://github.com/warner/python-ecdsa/issues/114
Release Notes https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3
Release Notes https://pypi.org/project/ecdsa/0.13.3/
45
/ 100
moderate-risk
Severity 31/34 · Critical
Exploitability 0/34 · Minimal
Exposure 14/34 · Moderate