---
title: "CVE-2016-1000109\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-2016-1000109?format=md
keywords: index, follow
---

# CVE-2016-1000109

Publication date 19 February 2020

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**5.3 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2016-1000109?format=md#impact-score)

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## Description

HHVM does not attempt to address RFC 3875 section 4.1.18 namespace
conflicts and therefore does not protect CGI applications from the presence
of untrusted client data in the HTTP\_PROXY environment variable, which
might allow remote attackers to redirect a CGI application's outbound HTTP
traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP
request, aka an "httpoxy" issue. This issue affects HHVM versions prior to
3.9.6, all versions between 3.10.0 and 3.12.4 (inclusive), and all versions
between 3.13.0 and 3.14.2 (inclusive).

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| hhvm | 26.04 LTS resolute | Not in release |
| 25.10 questing | Not in release |
| 25.04 plucky | Not in release |
| 24.10 oracular | Not in release |
| 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 21.10 impish | Not in release |
| 21.04 hirsute | Not in release |
| 20.10 groovy | Not in release |
| 20.04 LTS focal | Not in release |
| 19.10 eoan | Not in release |
| 19.04 disco | Not in release |
| 18.10 cosmic | Not in release |
| 18.04 LTS bionic | Not affected |
| 17.10 artful | Not affected |
| 17.04 zesty | Not affected |
| 16.10 yakkety | Not in release |
| 16.04 LTS xenial | Vulnerable |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | 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-2016-1000109?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 |
| --- | --- |
| hhvm | * Upstream:   [423b4b7](https://github.com/facebook/hhvm/commit/423b4b719afd5ef4e6e19d8447fbf7b6bc0d0a25) * Upstream:   [5e689ba](https://github.com/facebook/hhvm/commit/5e689baa819c5018799beafc50868c80efd8d74e) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.3 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.3 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1000109)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-1000109)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-1000109)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-1000109)

### Other references

* <https://www.kb.cert.org/vuls/id/JLAD-ABYJS2>
* <https://www.cve.org/CVERecord?id=CVE-2016-1000109>