---
title: "CVE-2015-3643\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-2015-3643?format=md
keywords: index, follow
---

# CVE-2015-3643

Publication date 28 September 2017

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.8 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2015-3643?format=md#impact-score)

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## Description

usb-creator before 0.2.38.3ubuntu0.1 on Ubuntu 12.04 LTS, before
0.2.56.3ubuntu0.1 on Ubuntu 14.04 LTS, before 0.2.62ubuntu0.3 on Ubuntu
14.10, and before 0.2.67ubuntu0.1 on Ubuntu 15.04 allows local users to
gain privileges by leveraging a missing call check\_polkit for the KVMTest
method.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| usb-creator | 15.04 vivid | Fixed 0.2.67ubuntu0.1 |
| 14.10 utopic | Fixed 0.2.62ubuntu0.3 |
| 14.04 LTS trusty | Fixed 0.2.56.3ubuntu0.1 |
| 12.04 LTS precise | Fixed 0.2.38.3ubuntu0.1 |

---

* [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**

7.8 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.8 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3643)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-3643)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-3643)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-3643)

### Other references

* <http://www.openwall.com/lists/oss-security/2015/05/04/3>
* <https://www.cve.org/CVERecord?id=CVE-2015-3643>