CVE-2019-14853

Publication date 14 October 2019

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
python-ecdsa	19.10 eoan	Fixed 0.13.2-2ubuntu0.1
	19.04 disco	Fixed 0.13-3ubuntu0.1
	18.04 LTS bionic	Fixed 0.13-2ubuntu0.18.04.1
	16.04 LTS xenial	Fixed 0.13-2ubuntu0.16.04.1
	14.04 LTS trusty	Not in release

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
python-ecdsa	Upstream: b0ea52b Upstream: 20b3774 Upstream: 897178c Upstream: 9080d1d Upstream: 14abfe0 Upstream: 563d2ee Upstream: 3427fa2 Upstream: 99c907d Upstream: b95be03 Upstream: 1eb2c04 Upstream: 5c4c74a

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-4196-1
python-ecdsa vulnerabilities
18 November 2019