---
title: "CVE-2011-3374\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-2011-3374?format=md
keywords: index, follow
---

# CVE-2011-3374

Publication date 26 November 2019

Last updated 25 August 2025

---

Ubuntu priority

**Critical**

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

## Cvss 3 Severity Score

**3.7 · Low**

[Score breakdown](https://ubuntu.com/security/CVE-2011-3374?format=md#impact-score)

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## Description

It was found that apt-key in apt, all versions, do not correctly validate
gpg keys with the master keyring, leading to a potential man-in-the-middle
attack.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2011-3374?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| apt | 11.04 natty | Fixed 0.8.13.2ubuntu4.2 |
| 10.10 maverick | Fixed 0.8.3ubuntu7.2 |
| 10.04 LTS lucid | Fixed 0.7.25.3ubuntu9.7 |
| 8.04 LTS hardy | Fixed 0.7.9ubuntu17.3 |

---

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

## Notes

---

### [sbeattie](https://launchpad.net/~sbeattie)

Ubuntu specific, debian does not enable net-update. After CVE-2012-0954, net-update was disabled permanently in apt 0.9.6ubuntu3

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

3.7 · Low

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 3.7 · Low |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3374)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2011-3374)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2011-3374)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2011-3374)

### Other references

* <http://seclists.org/fulldisclosure/2011/Sep/221>
* <https://www.cve.org/CVERecord?id=CVE-2011-3374>