---
title: "CVE-2018-1302\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-2018-1302?format=md
keywords: index, follow
---

# CVE-2018-1302

Publication date 26 March 2018

Last updated 25 August 2025

---

Ubuntu priority

**Low**

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

## Cvss 3 Severity Score

**5.9 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2018-1302?format=md#impact-score)

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## Description

When an HTTP/2 stream was destroyed after being handled, the Apache HTTP
Server prior to version 2.4.30 could have written a NULL pointer
potentially to an already freed memory. The memory pools maintained by the
server make this vulnerability hard to trigger in usual configurations, the
reporter and the team could not reproduce it outside debug builds, so it is
classified as low risk.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2018-1302?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| apache2 | 18.04 LTS bionic | Fixed 2.4.29-1ubuntu4.4 |
| 17.10 artful | Not affected |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not affected |

---

* [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-2018-1302?format=md#patch-details)

## Notes

---

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

artful and older don't enable http2 in the build.
this needs to be fixed by backporting the whole http2 module
from a more-recent apache2

### 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:   <http://svn.apache.org/viewvc?view=revision&revision=1822624> * Upstream:   <http://svn.apache.org/viewvc?view=revision&revision=1823781> * Upstream:   [1acf5c9](https://github.com/apache/httpd/commit/1acf5c9fd27cbf166c1f3e9b20e3bcfe8e790e48) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.9 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.9 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1302)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-1302)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-1302)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-1302)

### Related Ubuntu Security Notices (USN)

+ [USN-3783-1](https://usn.ubuntu.com/USN-3783-1)
+ Apache HTTP Server vulnerabilities
+ 3 October 2018

### Other references

* <http://www.openwall.com/lists/oss-security/2018/03/24/5>
* <https://httpd.apache.org/security/vulnerabilities_24.html>
* <https://www.cve.org/CVERecord?id=CVE-2018-1302>