CVE-2019-16779

Name: CVE-2019-16779
Creator: NVD / NIST
Published: 2019-12-16T20:15:15.54+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 1.40%

Last modified Jun 17, 2026

CVE-2019-16779 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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. EPSS estimates a 1.40% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

1.40%

69.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Excon Project	Excon	< 0.71.0	—
Opensuse	Backports Sle	15.0	Sp1
Opensuse	Leap	15.1	—
Debian	Debian Linux	8.0	—

References

http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00021.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00062.htmlThird Party Advisory
https://github.com/excon/excon/commit/ccb57d7a422f020dc74f1de4e8fb505ab46d8a29Patch, Third Party Advisory
https://github.com/excon/excon/security/advisories/GHSA-q58g-455p-8vw9Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/01/msg00015.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00021.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00062.htmlThird Party Advisory
https://github.com/excon/excon/commit/ccb57d7a422f020dc74f1de4e8fb505ab46d8a29Patch, Third Party Advisory
https://github.com/excon/excon/security/advisories/GHSA-q58g-455p-8vw9Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/01/msg00015.htmlMailing List, Third Party Advisory

Timeline

Published: Dec 16, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-16779?

How severe is CVE-2019-16779?

CVE-2019-16779 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 1.40% probability of exploitation in the next 30 days.

How do I fix CVE-2019-16779?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-16779?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST