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CVE-2017-18635: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

August 28, 2020 (updated January 4, 2022)

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.

References

  • access.redhat.com/errata/RHSA-2020:0754
  • bugs.launchpad.net/horizon/+bug/1656435
  • github.com/ShielderSec/cve-2017-18635
  • github.com/advisories/GHSA-49rv-g7w5-m8xx
  • github.com/novnc/noVNC/commit/6048299a138e078aed210f163111698c8c526a13
  • github.com/novnc/noVNC/issues/748
  • github.com/novnc/noVNC/releases/tag/v0.6.2
  • lists.debian.org/debian-lts-announce/2019/10/msg00004.html
  • lists.debian.org/debian-lts-announce/2021/12/msg00024.html
  • nvd.nist.gov/vuln/detail/CVE-2017-18635
  • snyk.io/vuln/SNYK-JS-NOVNCNOVNC-469136
  • usn.ubuntu.com/4522-1/
  • www.npmjs.com/advisories/1204
  • www.shielder.it/blog/exploiting-an-old-novnc-xss-cve-2017-18635-in-openstack/

Code Behaviors & Features

Detect and mitigate CVE-2017-18635 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →

Affected versions

All versions before 0.6.2

Fixed versions

  • 0.6.2

Solution

Upgrade to version 0.6.2 or above.

Impact 6.1 MEDIUM

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

Learn more about CVSS

Weakness

  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Source file

npm/@novnc/novnc/CVE-2017-18635.yml

Spotted a mistake? Edit the file on GitLab.

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