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.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-016618 advisory.

    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.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2019-16779)

Note that Nessus relies on the presence of the package as reported by the vendor.

Gitlab reports :

Path Traversal to Arbitrary File Read

User Permissions Not Validated in ProjectExportWorker

XSS Vulnerability in File API

Package and File Disclosure through GitLab Workhorse

XSS Vulnerability in Create Groups

Issue and Merge Request Activity Counts Exposed

Email Confirmation Bypass Using AP

Disclosure of Forked Private Project Source Code

Private Project Names Exposed in GraphQL queries

Disclosure of Issues and Merge Requests via Todos

Denial of Service via AsciiDoc

Last Pipeline Status Exposed

Arbitrary Change of Pipeline Status

Grafana Token Displayed in Plaintext

Update excon gem

Update rdoc gem

Update rack-cors gem

Update rubyzip gem

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.

For Debian 8 'Jessie', this problem has been fixed in version 0.33.0-2+deb8u1.

We recommend that you upgrade your ruby-excon packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for rubygem-excon fixes the following issues :

CVE-2019-16779 (boo#1159342): Fix a race condition around persistent connections, where a connection, which was interrupted, would leave data on the socket. Subsequent requests would then read this data, returning content from the previous response.

ID	Name	Product	Family	Severity
316156	Unity Linux 20.1060e / 20.1070e Security Update: rubygem-excon (UTSA-2026-016618)	Nessus	Unity Linux Local Security Checks	medium
259845	Linux Distros Unpatched Vulnerability : CVE-2019-16779	Nessus	Misc.	medium
133434	FreeBSD : Gitlab -- Multiple Vulnerabilities (c5bd9068-440f-11ea-9cdb-001b217b3468)	Nessus	FreeBSD Local Security Checks	critical
133103	Debian DLA-2070-1 : ruby-excon security update	Nessus	Debian Local Security Checks	medium
132912	openSUSE Security Update : rubygem-excon (openSUSE-2020-36)	Nessus	SuSE Local Security Checks	medium

Detections

Analytics

CVE-2019-16779

medium

Tenable Plugins

medium

medium

critical

medium

medium