---
title: "CVE-2021-41585\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-2021-41585?format=md
keywords: index, follow
---

# CVE-2021-41585

Publication date 3 November 2021

Last updated 11 July 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-2021-41585?format=md#impact-score)

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## Description

Improper Input Validation vulnerability in accepting socket connections in
Apache Traffic Server allows an attacker to make the server stop accepting
new connections. This issue affects Apache Traffic Server 5.0.0 to 9.1.0.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| trafficserver | 25.10 questing | Not affected |
| 25.04 plucky | Ignored end of life, was needs-triage |
| 24.10 oracular | Ignored end of life, was needs-triage |
| 24.04 LTS noble | Not affected |
| 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 | Not affected |
| 21.10 impish | Ignored end of life |
| 21.04 hirsute | Ignored end of life |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |
| 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)

## 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-2021-41585)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2021-41585)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2021-41585)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2021-41585)

### Other references

* <https://www.openwall.com/lists/oss-security/2021/11/02/11>
* <https://github.com/apache/trafficserver/pull/8456/>
* <https://github.com/apache/trafficserver/commit/268b540edae0b3e51d033795a4dd7404a5756a93 (master)>
* <https://github.com/apache/trafficserver/commit/2b078741ecf14cbc7f5773b3e14ef0c1d3cf4cfb (8.1.x)>
* <https://www.cve.org/CVERecord?id=CVE-2021-41585>