There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - An XSS vulnerability was discovered in noVNC before 0.6.2 in which the remote VNC server could inject
    arbitrary HTML into the noVNC web page via the messages propagated to the status field, such as the VNC
    server name. (CVE-2017-18635)

The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2854 advisory.

    An XSS vulnerability was discovered in noVNC, a HTML5 VNC client, in which the remote VNC server could     inject arbitrary HTML into the noVNC web page via the messages propagated to the status field, such as the     VNC server name. For Debian 9 stretch, this problem has been fixed in version     1:0.4+dfsg+1+20131010+gitf68af8af3d-6+deb9u1. We recommend that you upgrade your novnc packages. For the     detailed security status of novnc please refer to its security tracker page at: https://security-     tracker.debian.org/tracker/novnc Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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.

  - An XSS vulnerability was discovered in noVNC before 0.6.2 in which the remote VNC server could inject     arbitrary HTML into the noVNC web page via the messages propagated to the status field, such as the VNC     server name. (CVE-2017-18635)

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3247 advisory.

    The ovirt-engine package provides the Red Hat Virtualization Manager, a     centralized management platform that allows system administrators to view and manage virtual machines. The     Manager provides a comprehensive range of features including search capabilities, resource management,     live migrations, and virtual infrastructure provisioning.

    The Manager is a JBoss Application Server application that provides several interfaces through which the     virtual environment can be accessed and interacted with, including an Administration Portal, a VM Portal,     and a Representational State Transfer (REST) Application Programming Interface (API).

    A list of bugs fixed in this update is available in the Technical Notes     book:

    https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.4/html-single/technical_notes

    Security Fix(es):

    * apache-commons-beanutils: does not suppresses the class property in PropertyUtilsBean by default     (CVE-2019-10086)

    * libquartz: XXE attacks via job description (CVE-2019-13990)

    * novnc: XSS vulnerability via the messages propagated to the status field (CVE-2017-18635)

    * bootstrap: XSS in the tooltip or popover data-template attribute (CVE-2019-8331)

    * nimbus-jose-jwt: Uncaught exceptions while parsing a JWT (CVE-2019-17195)

    * ovirt-engine: response_type parameter allows reflected XSS (CVE-2019-19336)

    * nodejs-minimist: prototype pollution allows adding or modifying properties of Object.prototype using a     constructor or __proto__ payload (CVE-2020-7598)

    * ovirt-engine: Redirect to arbitrary URL allows for phishing (CVE-2020-10775)

    * Cross-site scripting due to improper injQuery.htmlPrefilter method (CVE-2020-11022)

    * jQuery: passing HTML containing <option> elements to manipulation methods could result in untrusted code     execution (CVE-2020-11023)

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

An XSS vulnerability was discovered in noVNC in which the remote VNC server could inject arbitrary HTML into the noVNC web page via the messages propagated to the status field, such as the VNC server name.

For Debian 8 'Jessie', this problem has been fixed in version 1:0.4+dfsg+1+20131010+gitf68af8af3d-4+deb8u1.

We recommend that you upgrade your novnc 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.

The remote Ubuntu 16.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-4522-1 advisory.

    It was discovered that noVNC did not properly manage certain messages,

    resulting in the remote VNC server injecting arbitrary HTML into the noVNC web page. An attacker could use     this issue to conduct cross-site

    scripting (XSS) attacks. (CVE-2017-18635)

Tenable has extracted the preceding description block directly from the Ubuntu 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 remote Redhat Enterprise Linux 7 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2020:0754 advisory.

    The novnc package provides a VNC client that uses HTML5 (Web Sockets, Canvas) and includes encryption     support.

    An XSS vulnerability was discovered in noVNC in which arbitrary HTML could be injected into the noVNC web     page. An attacker having access to a VNC server could use target host values in a crafted URL to gain     access to secure information (such as VM tokens). (CVE-2017-18635)

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

ID	Name	Product	Family	Published	Updated	Severity
410082	SCA: security update for @novnc/novnc (GHSA-49rv-g7w5-m8xx)	Tenable Cloud Security	SCA Checks	1/23/2025	7/2/2026	medium
410082	SCA: security update for @novnc/novnc (GHSA-49rv-g7w5-m8xx)	Tenable Self-Hosted Container Security	SCA Checks	1/23/2025	7/2/2026	medium
156332	Debian DLA-2854-1 : novnc - LTS security update	Nessus	Debian Local Security Checks	12/28/2021	1/24/2025	medium
252847	Linux Distros Unpatched Vulnerability : CVE-2017-18635	Nessus	Misc.	8/20/2025	8/20/2025	medium
210560	RHEL 8 : RHV Manager (ovirt-engine) 4.4 (RHSA-2020:3247)	Nessus	Red Hat Local Security Checks	11/8/2024	3/6/2025	critical
129594	Debian DLA-1946-1 : novnc security update	Nessus	Debian Local Security Checks	10/7/2019	4/19/2024	medium
140717	Ubuntu 16.04 LTS : noVNC vulnerability (USN-4522-1)	Nessus	Ubuntu Local Security Checks	9/21/2020	8/27/2024	medium
170343	RHEL 7 : novnc (RHSA-2020:0754)	Nessus	Red Hat Local Security Checks	1/23/2023	11/7/2024	medium

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