CVE-2017-18635
MEDIUMCVSS 6.1/10EPSS 4.81%
Last modified
CVE-2017-18635 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 4.81% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Novnc | Novnc | < 0.6.2 |
| Debian | Debian Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Canonical | Ubuntu Linux | 16.04 |
| Redhat | Openstack | 13 |
References
- https://access.redhat.com/errata/RHSA-2020:0754Third Party Advisory
- https://bugs.launchpad.net/horizon/+bug/1656435Issue Tracking, Third Party Advisory
- https://github.com/ShielderSec/cve-2017-18635Third Party Advisory
- https://github.com/novnc/noVNC/issues/748Patch, Third Party Advisory
- https://github.com/novnc/noVNC/releases/tag/v0.6.2Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00004.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00024.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/4522-1/Third Party Advisory
- https://www.shielder.it/blog/exploiting-an-old-novnc-xss-cve-2017-18635-in-openstack/Exploit, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0754Third Party Advisory
- https://bugs.launchpad.net/horizon/+bug/1656435Issue Tracking, Third Party Advisory
- https://github.com/ShielderSec/cve-2017-18635Third Party Advisory
- https://github.com/novnc/noVNC/issues/748Patch, Third Party Advisory
- https://github.com/novnc/noVNC/releases/tag/v0.6.2Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00004.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00024.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/4522-1/Third Party Advisory
- https://www.shielder.it/blog/exploiting-an-old-novnc-xss-cve-2017-18635-in-openstack/Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2017-18635?
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.
How severe is CVE-2017-18635?
CVE-2017-18635 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 4.81% probability of exploitation in the next 30 days.
How do I fix CVE-2017-18635?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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