---
title: "CVE-2023-5679\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-2023-5679?format=md
keywords: index, follow
---

# CVE-2023-5679

Publication date 13 February 2024

Last updated 4 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2023-5679?format=md#impact-score)

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## Description

A bad interaction between DNS64 and serve-stale may cause `named` to crash
with an assertion failure during recursive resolution, when both of these
features are enabled.
This issue affects BIND 9 versions 9.16.12 through 9.16.45, 9.18.0 through
9.18.21, 9.19.0 through 9.19.19, 9.16.12-S1 through 9.16.45-S1, and
9.18.11-S1 through 9.18.21-S1.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2023-5679?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| bind9 | 25.04 plucky | Fixed 1:9.18.24-0ubuntu1 |
| 24.10 oracular | Fixed 1:9.18.24-0ubuntu1 |
| 24.04 LTS noble | Fixed 1:9.18.24-0ubuntu1 |
| 23.10 mantic | Fixed 1:9.18.18-0ubuntu2.1 |
| 22.04 LTS jammy | Fixed 1:9.18.18-0ubuntu0.22.04.2 |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not affected |
| bind9-libs | 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 affected |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |
| isc-dhcp | 25.04 plucky | Not affected |
| 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | 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-2023-5679?format=md#patch-details)

## Notes

---

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

As of isc-dhcp-4.4.3-1, isc-dhcp vendors bind9 libs

---

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

possibly introduced in 9.16.12

### 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 |
| --- | --- |
| bind9 | * Upstream:   <https://ftp.isc.org/isc/bind9/9.16.48/patches/0003-CVE-2023-5679.patch> |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.5 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-5679)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2023-5679)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2023-5679)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2023-5679)

### Related Ubuntu Security Notices (USN)

+ [USN-6633-1](https://usn.ubuntu.com/USN-6633-1)
+ Bind vulnerabilities
+ 13 February 2024

### Other references

* <https://kb.isc.org/docs/cve-2023-5679>
* <https://www.cve.org/CVERecord?id=CVE-2023-5679>