---
title: "CVE-2017-10784\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-2017-10784?format=md
keywords: index, follow
---

# CVE-2017-10784

Publication date 19 September 2017

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**8.8 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2017-10784?format=md#impact-score)

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## Description

The Basic authentication code in WEBrick library in Ruby before 2.2.8,
2.3.x before 2.3.5, and 2.4.x through 2.4.1 allows remote attackers to
inject terminal emulator escape sequences into its log and possibly execute
arbitrary commands via a crafted user name.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| ruby1.9.1 | 18.04 LTS bionic | Not in release |
| 17.10 artful | Not in release |
| 17.04 zesty | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Fixed 1.9.3.484-2ubuntu1.5 |
| ruby2.0 | 18.04 LTS bionic | Not in release |
| 17.10 artful | Not in release |
| 17.04 zesty | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Fixed 2.0.0.484-1ubuntu2.10 |
| ruby2.3 | 18.04 LTS bionic | Not in release |
| 17.10 artful | Fixed 2.3.3-1ubuntu1.2 |
| 17.04 zesty | Ignored end of life |
| 16.04 LTS xenial | Fixed 2.3.1-2~16.04.5 |
| 14.04 LTS trusty | Not in release |

---

* [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-2017-10784?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 |
| --- | --- |
| ruby2.3 | * Upstream:   [6617c41](https://github.com/ruby/ruby/commit/6617c41292b7d1e097abb8fdb0cab9ddd83c77e7) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

8.8 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 8.8 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-10784)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-10784)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-10784)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-10784)

### Related Ubuntu Security Notices (USN)

+ [USN-3439-1](https://usn.ubuntu.com/USN-3439-1)
+ Ruby vulnerabilities
+ 5 October 2017

+ [USN-3685-1](https://usn.ubuntu.com/USN-3685-1)
+ Ruby vulnerabilities
+ 13 June 2018

+ [USN-3528-1](https://usn.ubuntu.com/USN-3528-1)
+ Ruby vulnerabilities
+ 10 January 2018

### Other references

* <https://www.ruby-lang.org/en/news/2017/09/14/webrick-basic-auth-escape-sequence-injection-cve-2017-10784/>
* <https://hackerone.com/reports/223363>
* <https://www.cve.org/CVERecord?id=CVE-2017-10784>