Sinatra before 2.0.2 has XSS via the 400 Bad Request page that occurs upon a params parser exception.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:0212 advisory.

    Red Hat CloudForms Management Engine delivers the insight, control, and automation needed to address the     challenges of managing virtual environments. CloudForms Management Engine is built on Ruby on Rails, a     model-view-controller (MVC) framework for web application development. Action Pack implements the     controller and the view components.

    Security Fix(es):

    * rubygem-sinatra: XSS in the 400 Bad Request page (CVE-2018-11627)

    For more details about the security issue(s), including the impact, a CVSS score, and other related     information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    This update fixes various bugs and adds enhancements. Documentation for these changes is available from     the Release Notes document linked to in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2019:0315 advisory.

    Red Hat CloudForms Management Engine delivers the insight, control, and automation needed to address the     challenges of managing virtual environments. CloudForms Management Engine is built on Ruby on Rails, a     model-view-controller (MVC) framework for web application development. Action Pack implements the     controller and the view components.

    Security Fix(es):

    * rubygem-sinatra: XSS in the 400 Bad Request page (CVE-2018-11627)

    For more details about the security issue(s), including the impact, a CVSS score, and other related     information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    This update fixes various bugs and adds enhancements. Documentation for these changes is available from     the Release Notes document linked to in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

Fix XSS in the 400 Bad Request page (CVE-2018-11627, rhbz#1585218).

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Sinatra blog :

Sinatra had a critical vulnerability since v2.0.0. The purpose of this release is to fix CVE-2018-11627.

The vulnerability is that XSS can be executed by using illegal parameters.

ID	Name	Product	Family	Severity
210303	RHEL 7 : CloudForms 4.7 (RHSA-2019:0212)	Nessus	Red Hat Local Security Checks	high
194132	RHEL 7 : CloudForms 4.6.8 (RHSA-2019:0315)	Nessus	Red Hat Local Security Checks	medium
120372	Fedora 28 : 1:rubygem-sinatra (2018-3f61c5cf7c)	Nessus	Fedora Local Security Checks	medium
111479	FreeBSD : sinatra -- XSS vulnerability (ca05d9da-ac1d-4113-8a05-ffe9cd0d6160)	Nessus	FreeBSD Local Security Checks	medium
110667	Fedora 27 : 1:rubygem-sinatra (2018-0b17e1e529)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2018-11627

medium

Tenable Plugins

high

medium

medium

medium

medium