---
title: "CVE-2020-36855\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-2020-36855?format=md
keywords: index, follow
---

# CVE-2020-36855

Publication date 21 October 2025

Last updated 7 September 2026

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**5.3 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2020-36855?format=md#impact-score)

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## Description

A security vulnerability has been detected in DCMTK up to 3.6.5. The
affected element is the function parseQuota of the component dcmqrscp. The
manipulation of the argument StorageQuota leads to stack-based buffer
overflow. Local access is required to approach this attack. The exploit has
been disclosed publicly and may be used. Upgrading to version 3.6.6 is
sufficient to fix this issue. The identifier of the patch is 0fef9f02e. It
is recommended to upgrade the affected component.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| dcmtk | 26.04 LTS resolute | Not affected |
| 25.10 questing | Not affected |
| 24.04 LTS noble | Not affected |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Needs evaluation |
| 18.04 LTS bionic | Needs evaluation |
| 16.04 LTS xenial | Needs evaluation |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:

CVSS v4.0

[CVSS v4.0](https://ubuntu.com/security/CVE-2020-36855?format=md)
[CVSS v3.0](https://ubuntu.com/security/CVE-2020-36855?format=md)

**Base score**

1.9 · Low

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | Low |
  | Attack requirements | None |
  | Privileges required | Low |
  | User interaction | None |
  | Vulnerable system - Confidentiality impact | Low |
  | Vulnerable system - Integrity impact | Low |
  | Vulnerable system - Availability impact | Low |
  | Subsequent system - Confidentiality impact | None |
  | Subsequent system - Integrity impact | None |
  | Subsequent system - Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 1.9 · Low |
  | Base + Threat score | - |
  | Base + Environmental score | - |
  | Base + Threat + Environmental score | - |

**Vector:** CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36855)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2020-36855)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2020-36855)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2020-36855)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2020-36855>