---
title: "CVE-2017-11499\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-2017-11499?format=md
keywords: index, follow
---

# CVE-2017-11499

Publication date 25 July 2017

Last updated 26 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-2017-11499?format=md#impact-score)

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## Description

Node.js v4.0 through v4.8.3, all versions of v5.x, v6.0 through v6.11.0,
v7.0 through v7.10.0, and v8.0 through v8.1.3 was susceptible to hash
flooding remote DoS attacks as the HashTable seed was constant across a
given released version of Node.js. This was a result of building with V8
snapshots enabled by default which caused the initially randomized seed to
be overwritten on startup.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| nodejs | 26.04 LTS resolute | Not affected |
| 25.10 questing | Not affected |
| 25.04 plucky | Not affected |
| 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 23.04 lunar | Not affected |
| 22.10 kinetic | Not affected |
| 22.04 LTS jammy | Not affected |
| 21.10 impish | Not affected |
| 21.04 hirsute | Not affected |
| 20.10 groovy | Not affected |
| 20.04 LTS focal | Not affected |
| 19.10 eoan | Not affected |
| 19.04 disco | Not affected |
| 18.10 cosmic | Not affected |
| 18.04 LTS bionic | Not affected |
| 17.10 artful | Not affected |
| 17.04 zesty | Ignored end of life |
| 16.04 LTS xenial | Vulnerable |
| 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-2017-11499)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-11499)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-11499)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-11499)

### Other references

* <https://nodejs.org/en/blog/release/v6.11.1/>
* <https://nodejs.org/en/blog/release/v4.8.4/>
* <https://nodejs.org/en/blog/vulnerability/july-2017-security-releases/>
* <https://www.cve.org/CVERecord?id=CVE-2017-11499>