---
title: "CVE-2018-6356\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-2018-6356?format=md
keywords: index, follow
---

# CVE-2018-6356

Publication date 20 February 2018

Last updated 17 July 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**6.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2018-6356?format=md#impact-score)

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## Description

Jenkins before 2.107 and Jenkins LTS before 2.89.4 did not properly prevent
specifying relative paths that escape a base directory for URLs accessing
plugin resource files. This allowed users with Overall/Read permission to
download files from the Jenkins master they should not have access to. On
Windows, any file accessible to the Jenkins master process could be
downloaded. On other operating systems, any file within the Jenkins home
directory accessible to the Jenkins master process could be downloaded.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| jenkins | 17.10 artful | Not in release |
| 16.04 LTS xenial | Not in release |
| 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)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

6.5 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.5 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6356)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-6356)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-6356)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-6356)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2018-6356>