---
title: "CVE-2019-15892\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-2019-15892?format=md
keywords: index, follow
---

# CVE-2019-15892

Publication date 3 September 2019

Last updated 25 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-2019-15892?format=md#impact-score)

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## Description

An issue was discovered in Varnish Cache before 6.0.4 LTS, and 6.1.x and
6.2.x before 6.2.1. An HTTP/1 parsing failure allows a remote attacker to
trigger an assert by sending crafted HTTP/1 requests. The assert will cause
an automatic restart with a clean cache, which makes it a Denial of Service
attack.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| varnish | 20.04 LTS focal | Not affected |
| 19.10 eoan | Ignored end of life |
| 19.04 disco | Ignored end of life |
| 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)

## 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:3.0/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-2019-15892)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-15892)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-15892)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2019-15892)

### Other references

* <https://varnish-cache.org/security/VSV00003.html>
* <https://github.com/varnishcache/varnish-cache/commit/1cb778f6f69737109e8c070a74b8e95b78f46d13>
* <https://github.com/varnishcache/varnish-cache/commit/0f0e51e9871ed1bd1236378f8b0dea0d33df4e9e>
* <https://github.com/varnishcache/varnish-cache/commit/72df38fa8bfc0f5ca4a75d3e32657e8e590d85ab>
* <https://github.com/varnishcache/varnish-cache/commit/dd47e658a0de9d12c433a4a01fb43ea4fe4d3a41>
* <https://github.com/varnishcache/varnish-cache/commit/34717183beda3803e3d54c9826a1a9f026ca2505>
* <https://github.com/varnishcache/varnish-cache/commit/ec3997a59a93cbc13a3cba22dfe0b4c4710a8f65>
* <https://github.com/varnishcache/varnish-cache/commit/af13de03eaa3d04f60ada52ed3235d545b8d3973>
* <https://github.com/varnishcache/varnish-cache/commit/6da64a47beff44ecdb45c82b033811f2d19819af>
* <https://seclists.org/bugtraq/2019/Sep/5>
* <https://www.debian.org/security/2019/dsa-4514>
* <https://www.cve.org/CVERecord?id=CVE-2019-15892>