---
title: "CVE-2017-12778\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-2017-12778?format=md
keywords: index, follow
---

# CVE-2017-12778

Publication date 9 May 2019

Last updated 4 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.1 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2017-12778?format=md#impact-score)

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## Description

The UI Lock feature in qBittorrent version 3.3.15 is vulnerable to
Authentication Bypass, which allows Attack to gain unauthorized access to
qBittorrent functions by tampering the affected flag value of the config
file at the C:\Users\<username>\Roaming\qBittorrent pathname. The attacker
must change the value of the "locked" attribute to "false" within the
"Locking" stanza. NOTE: This is an intended behavior. See
https://github.com/qbittorrent/qBittorrent/wiki/I-forgot-my-UI-lock-password

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| qbittorrent | 24.04 LTS noble | Not affected |
| 23.10 mantic | Ignored end of life, was needs-triage |
| 23.04 lunar | Ignored end of life, was needs-triage |
| 22.10 kinetic | Ignored end of life, was needs-triage |
| 22.04 LTS jammy | Not affected |
| 21.10 impish | Ignored end of life |
| 21.04 hirsute | Ignored end of life |
| 20.10 groovy | Ignored end of life |
| 20.04 LTS focal | Not affected |
| 19.10 eoan | Ignored end of life |
| 19.04 disco | Ignored end of life |
| 18.10 cosmic | Ignored end of life |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |
| 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**

7.1 · 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 | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.1 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-12778)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-12778)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-12778)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-12778)

### Other references

* <http://archive.is/eF2GR>
* <http://qbittorrent.com>
* <https://medium.com/@BaYinMin/cve-2017-12778-qbittorrent-ui-lock-authentication-bypass-30959ff55ada>
* <https://www.cve.org/CVERecord?id=CVE-2017-12778>