---
title: "CVE-2017-3167\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-2017-3167?format=md
keywords: index, follow
---

# CVE-2017-3167

Publication date 19 June 2017

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**9.8 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2017-3167?format=md#impact-score)

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## Description

In Apache httpd 2.2.x before 2.2.33 and 2.4.x before 2.4.26, use of the
ap\_get\_basic\_auth\_pw() by third-party modules outside of the authentication
phase may lead to authentication requirements being bypassed.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| apache2 | 17.04 zesty | Fixed 2.4.25-3ubuntu2.1 |
| 16.10 yakkety | Fixed 2.4.18-2ubuntu4.2 |
| 16.04 LTS xenial | Fixed 2.4.18-2ubuntu3.3 |
| 14.04 LTS trusty | Fixed 2.4.7-1ubuntu4.16 |

---

* [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-2017-3167?format=md#patch-details)

### 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 |
| --- | --- |
| apache2 | * Upstream:   <https://www.apache.org/dist/httpd/patches/apply_to_2.2.32/CVE-2017-3167.patch> * Upstream:   [78f0f0b](https://github.com/apache/httpd/commit/78f0f0b6585f13ec1175c7020ee01cd0237fc1ba) * Upstream:   [7103baa](https://github.com/apache/httpd/commit/7103baa2e70e37eeaf7847abaa6f3567ef2cdf73) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

9.8 · Critical

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 9.8 · Critical |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-3167)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-3167)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-3167)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-3167)

### Related Ubuntu Security Notices (USN)

+ [USN-3340-1](https://usn.ubuntu.com/USN-3340-1)
+ Apache HTTP Server vulnerabilities
+ 26 June 2017

+ [USN-3373-1](https://usn.ubuntu.com/USN-3373-1)
+ Apache HTTP Server vulnerabilities
+ 31 July 2017

### Other references

* <https://lists.apache.org/thread.html/8409e41a8f7dd9ded37141c38df001be930115428c3d64f70bbdb8b4@%3Cdev.httpd.apache.org%3E>
* <https://www.cve.org/CVERecord?id=CVE-2017-3167>