---
title: "CVE-2022-41318\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-2022-41318?format=md
keywords: index, follow
---

# CVE-2022-41318

Publication date 23 September 2022

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**8.6 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2022-41318?format=md#impact-score)

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## Description

A buffer over-read was discovered in libntlmauth in Squid 2.5 through 5.6.
Due to incorrect integer-overflow protection, the SSPI and SMB
authentication helpers are vulnerable to reading unintended memory
locations. In some configurations, cleartext credentials from these
locations are sent to a client. This is fixed in 5.7.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| squid | 24.04 LTS noble | Fixed 5.6-1ubuntu3 |
| 23.10 mantic | Fixed 5.6-1ubuntu3 |
| 23.04 lunar | Fixed 5.6-1ubuntu3 |
| 22.10 kinetic | Fixed 5.6-1ubuntu3 |
| 22.04 LTS jammy | Fixed 5.2-1ubuntu4.2 |
| 20.04 LTS focal | Fixed 4.10-1ubuntu1.7 |
| 18.04 LTS bionic | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |
| squid3 | 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Fixed 3.5.27-1ubuntu1.14 |
| 16.04 LTS xenial | Fixed 3.5.12-1ubuntu7.16+esm3  Ubuntu Pro |
| 14.04 LTS trusty | Ignored end of standard support |

---

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

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## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

8.6 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 8.6 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-41318)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2022-41318)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2022-41318)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2022-41318)

### Related Ubuntu Security Notices (USN)

+ [USN-5641-1](https://usn.ubuntu.com/USN-5641-1)
+ Squid vulnerabilities
+ 26 September 2022

+ [USN-6857-1](https://usn.ubuntu.com/USN-6857-1)
+ Squid vulnerabilities
+ 27 June 2024

### Other references

* <https://www.openwall.com/lists/oss-security/2022/09/23/2>
* <https://www.cve.org/CVERecord?id=CVE-2022-41318>