CVE-2019-14853

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-11-26 · updated 2026-06-17
Weakness: CWE-391

Description

An error-handling flaw was found in python-ecdsa before version 0.13.3. During signature decoding, malformed DER signatures could raise unexpected exceptions (or no exceptions at all), which could lead to a denial of service.

Affected products

[UNKNOWN] python-ecdsa: before 0.13.3 — fixed in 0.13.3

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-2019-14853
https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3
https://seclists.org/bugtraq/2019/Dec/33
https://www.debian.org/security/2019/dsa-4588
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14853
https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3
https://seclists.org/bugtraq/2019/Dec/33
https://www.debian.org/security/2019/dsa-4588

Get alerted when CVE-2019-14853 or the next vulnerability affects your stack