---
title: "CVE-2018-19960\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-2018-19960?format=md
keywords: index, follow
---

# CVE-2018-19960

Publication date 7 December 2018

Last updated 8 July 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.0 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2018-19960?format=md#impact-score)

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## Description

The debug\_mode function in web/web.py in OnionShare through 1.3.1, when
--debug is enabled, uses the /tmp/onionshare\_server.log pathname for
logging, which might allow local users to overwrite files or obtain
sensitive information by using this pathname.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2018-19960?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| onionshare | 25.04 plucky | Not affected |
| 24.10 oracular | Not affected |
| 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 | Not in release |
| 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 | Not affected |
| 18.10 cosmic | Ignored end of life |
| 18.04 LTS bionic | Fixed 0.9.2-1ubuntu0.1~esm1  Ubuntu Pro |
| 16.04 LTS xenial | Fixed 0.8.1-1ubuntu0.1~esm1  Ubuntu Pro |
| 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-2018-19960?format=md#patch-details)

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## Notes

---

### [john-breton](https://launchpad.net/~john-breton)

Per Debian: "Debian uses kernel hardening on Linux by
default which renders this non-exploitable (and the
release notes state that if rolls a custom kernel the
same options need to be enabled). The only remaining
impact is that on a multi user environment one user
using the debug mode prevents others from using debug
mode, but that's mostly a bug, not a security issue."
That being said, the fix is trivial. This can be
bundled in with other security fixes, and this bug
can be fixed as a consequence.

### 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 |
| --- | --- |
| onionshare | * Upsteam:   [aa5fdde](https://github.com/onionshare/onionshare/commit/aa5fdde6a4e4de7f113e01a3b446dcc14dcecb1a) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.0 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.0 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-19960)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-19960)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-19960)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-19960)

### Related Ubuntu Security Notices (USN)

+ [USN-7625-1](https://usn.ubuntu.com/USN-7625-1)
+ OnionShare vulnerabilities
+ 8 July 2025

### Other references

* <https://bugs.debian.org/915859>
* <https://www.cve.org/CVERecord?id=CVE-2018-19960>