CVE-2017-18635

moderate-risk

Published 2019-09-25

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.

Do I need to act?

8.3% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 6.1/10 Medium

NETWORK / LOW complexity

Affected Products (5)

Novnc

Debian Linux

Ubuntu Linux

Openstack

Affected Vendors

Debian Redhat Canonical Novnc

References (20)

Third Party Advisory https://access.redhat.com/errata/RHSA-2020:0754

Issue Tracking https://bugs.launchpad.net/horizon/+bug/1656435

Third Party Advisory https://github.com/ShielderSec/cve-2017-18635

Patch https://github.com/novnc/noVNC/commit/6048299a138e078aed210f163111698c8c526a13#d...

Patch https://github.com/novnc/noVNC/issues/748

Release Notes https://github.com/novnc/noVNC/releases/tag/v0.6.2

Mailing List https://lists.debian.org/debian-lts-announce/2019/10/msg00004.html

Mailing List https://lists.debian.org/debian-lts-announce/2021/12/msg00024.html

Third Party Advisory https://usn.ubuntu.com/4522-1/

Exploit https://www.shielder.it/blog/exploiting-an-old-novnc-xss-cve-2017-18635-in-opens...