---
title: "CVE-2022-23943\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-2022-23943?format=md
keywords: index, follow
---

# CVE-2022-23943

Publication date 14 March 2022

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-2022-23943?format=md#impact-score)

Toggle side navigation

## Description

Out-of-bounds Write vulnerability in mod\_sed of Apache HTTP Server allows
an attacker to overwrite heap memory with possibly attacker provided data.
This issue affects Apache HTTP Server 2.4 version 2.4.52 and prior
versions.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| apache2 | 22.04 LTS jammy | Fixed 2.4.52-1ubuntu2 |
| 21.10 impish | Fixed 2.4.48-3.1ubuntu3.3 |
| 20.04 LTS focal | Fixed 2.4.41-4ubuntu3.10 |
| 18.04 LTS bionic | Fixed 2.4.29-1ubuntu4.22 |
| 16.04 LTS xenial | Fixed 2.4.18-2ubuntu3.17+esm5  Ubuntu Pro |
| 14.04 LTS trusty | Fixed 2.4.7-1ubuntu4.22+esm4  Ubuntu Pro |

---

* [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-2022-23943?format=md#patch-details)

### Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

[Get Ubuntu Pro](https://ubuntu.com/pro)
[30-day free trial](https://ubuntu.com/pro/free-trial)

### 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:   [943f57b](https://github.com/apache/httpd/commit/943f57b336f264d77e5b780c82ab73daf3d14deb) * Upstream:   [e266bd0](https://github.com/apache/httpd/commit/e266bd09c313a668d7cca17a8b096d189148be49) * Upstream:   <https://svn.apache.org/viewvc?view=revision&revision=1898695> * Upstream:   <https://svn.apache.org/viewvc?view=revision&revision=1898772> |

## 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-2022-23943)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2022-23943)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2022-23943)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2022-23943)

### Related Ubuntu Security Notices (USN)

+ [USN-5333-1](https://usn.ubuntu.com/USN-5333-1)
+ Apache HTTP Server vulnerabilities
+ 17 March 2022

+ [USN-5333-2](https://usn.ubuntu.com/USN-5333-2)
+ Apache HTTP Server vulnerabilities
+ 17 March 2022

### Other references

* <https://httpd.apache.org/security/vulnerabilities_24.html>
* <https://www.cve.org/CVERecord?id=CVE-2022-23943>