---
title: "CVE-2022-4639\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-2022-4639?format=md
keywords: index, follow
---

# CVE-2022-4639

Publication date 21 December 2022

Last updated 11 July 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**5.6 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2022-4639?format=md#impact-score)

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## Description

A vulnerability, which was classified as critical, has been found in sslh.
This issue affects the function hexdump of the file probe.c of the
component Packet Dumping Handler. The manipulation of the argument msg\_info
leads to format string. The attack may be initiated remotely. The name of
the patch is b19f8a6046b080e4c2e28354a58556bb26040c6f. It is recommended to
apply a patch to fix this issue. The identifier VDB-216497 was assigned to
this vulnerability.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| sslh | 26.04 LTS resolute | Needs evaluation |
| 25.10 questing | Ignored end of life, was needs-triage |
| 25.04 plucky | Ignored end of life, was needs-triage |
| 24.10 oracular | Ignored end of life, was needs-triage |
| 24.04 LTS noble | Needs evaluation |
| 23.10 mantic | Ignored end of life, was needs-triage |
| 23.04 lunar | Ignored end of life, was needs-triage |
| 22.10 kinetic | Ignored end of life, was needs-triage |
| 22.04 LTS jammy | Needs evaluation |
| 20.04 LTS focal | Needs evaluation |
| 18.04 LTS bionic | Needs evaluation |
| 16.04 LTS xenial | Needs evaluation |
| 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)
* [Patch details](https://ubuntu.com/security/CVE-2022-4639?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 |
| --- | --- |
| sslh | * Upstream:   [b19f8a6](https://github.com/yrutschle/sslh/commit/b19f8a6046b080e4c2e28354a58556bb26040c6f) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.6 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.6 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-4639)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2022-4639)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2022-4639)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2022-4639)

### Other references

* <https://github.com/yrutschle/sslh/pull/353>
* <https://www.cve.org/CVERecord?id=CVE-2022-4639>