---
title: "CVE-2019-16779\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-2019-16779?format=md
keywords: index, follow
---

# CVE-2019-16779

Publication date 16 December 2019

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**5.8 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2019-16779?format=md#impact-score)

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## Description

In RubyGem excon before 0.71.0, there was a race condition around
persistent connections, where a connection which is interrupted (such as by
a timeout) would leave data on the socket. Subsequent requests would then
read this data, returning content from the previous response. The race
condition window appears to be short, and it would be difficult to
purposefully exploit this.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| ruby-excon | 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 | Ignored end of life |
| 19.04 disco | Ignored end of life |
| 18.04 LTS bionic | Needs evaluation |
| 16.04 LTS xenial | Needs evaluation |
| 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)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.8 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.8 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16779)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-16779)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-16779)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2019-16779)

### Other references

* <https://github.com/excon/excon/security/advisories/GHSA-q58g-455p-8vw9>
* <https://github.com/excon/excon/commit/ccb57d7a422f020dc74f1de4e8fb505ab46d8a29>
* <https://www.cve.org/CVERecord?id=CVE-2019-16779>