---
title: "CVE-2019-14853\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2019-14853?format=md
keywords: index, follow
---

# CVE-2019-14853

Publication date 14 October 2019

Last updated 25 August 2025

---

Ubuntu priority

**Low**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2019-14853?format=md#impact-score)

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## 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 |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2019-14853?format=md#patch-details)

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| python-ecdsa | * Upstream:   [b0ea52b](https://github.com/warner/python-ecdsa/commit/b0ea52bb3aa9a16c9a4a91fdc0041edbfed10b31) * Upstream:   [20b3774](https://github.com/warner/python-ecdsa/commit/20b377491e2d759a3f47eb7aedba41292cc82238) * Upstream:   [897178c](https://github.com/warner/python-ecdsa/commit/897178ca093282979ff19cc4035eadbc30ac0d23) * Upstream:   [9080d1d](https://github.com/warner/python-ecdsa/commit/9080d1d5ac533da0de00466aaffb49bee808bb4e) * Upstream:   [14abfe0](https://github.com/warner/python-ecdsa/commit/14abfe020d4907fd9849f269b98f5f8f1060366b) * Upstream:   [563d2ee](https://github.com/warner/python-ecdsa/commit/563d2ee2c07e10ae4f77ccde4161d6a14c681b1b) * Upstream:   [3427fa2](https://github.com/warner/python-ecdsa/commit/3427fa29f319b27898a28601955807abb44c0830) * Upstream:   [99c907d](https://github.com/warner/python-ecdsa/commit/99c907d7acc94da6685470328174ea7299863dfd) * Upstream:   [b95be03](https://github.com/warner/python-ecdsa/commit/b95be03d8540b3a088263cbb3a0a376a8a0efbd0) * Upstream:   [1eb2c04](https://github.com/warner/python-ecdsa/commit/1eb2c0410b97ac5101b5db20e2924d79db3e8ec5) * Upstream:   [5c4c74a](https://github.com/warner/python-ecdsa/commit/5c4c74a454c852727ac3c0207a4010486dde1866) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.5 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | None |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14853)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-14853)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-14853)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2019-14853)

### Related Ubuntu Security Notices (USN)

+ [USN-4196-1](https://usn.ubuntu.com/USN-4196-1)
+ python-ecdsa vulnerabilities
+ 18 November 2019

### Other references

* <https://github.com/warner/python-ecdsa/pull/115>
* <https://github.com/warner/python-ecdsa/pull/124>
* <https://www.cve.org/CVERecord?id=CVE-2019-14853>