CVE-2017-18635: XSS
First published: Sat Jan 12 2019(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/novnc | <0:1.1.0-2.el7 | 0:1.1.0-2.el7 |
| redhat/novnc | <0:1.1.0-1.el8 | 0:1.1.0-1.el8 |
| Novnc Novnc | <0.6.2 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Canonical Ubuntu Linux | =16.04 | |
| Redhat Openstack | =13 | |
| redhat/novnc | <0.6.2 | 0.6.2 |
| ubuntu/novnc | <1:0.4+dfsg+1+20131010+ | 1:0.4+dfsg+1+20131010+ |
| debian/novnc | 1:1.0.0-3 1:1.3.0-1 1:1.3.0-2 | |
| <0.6.2 | ||
| =8.0 | ||
| =9.0 | ||
| =16.04 | ||
| =13 |
Remedy
There is no known mitigation for this issue, the flaw can only be resolved by applying updates.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2017-18635 https://nvd.nist.gov/vuln/detail/CVE-2017-18635 https://github.com/novnc/noVNC/releases/tag/v0.6.2
- https://bugzilla.redhat.com/show_bug.cgi?id=1765660
- https://access.redhat.com/errata/RHSA-2020:0754
- https://access.redhat.com/errata/RHSA-2020:3247
- https://access.redhat.com/security/cve/cve-2017-18635
- https://bugs.launchpad.net/horizon/+bug/1656435
- https://github.com/ShielderSec/cve-2017-18635
- https://github.com/novnc/noVNC/commit/6048299a138e078aed210f163111698c8c526a13#diff-286f7dc7b881e942e97cd50c10898f03L534
- https://github.com/novnc/noVNC/issues/748
- https://github.com/novnc/noVNC/releases/tag/v0.6.2
- https://lists.debian.org/debian-lts-announce/2019/10/msg00004.html
- https://lists.debian.org/debian-lts-announce/2021/12/msg00024.html
- https://usn.ubuntu.com/4522-1/
- https://www.shielder.it/blog/exploiting-an-old-novnc-xss-cve-2017-18635-in-openstack/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1765662
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1765661
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1765663
- https://ubuntu.com/security/notices/USN-4522-1
- https://www.cve.org/CVERecord?id=CVE-2017-18635
- https://nvd.nist.gov/vuln/detail/CVE-2017-18635
- https://launchpad.net/bugs/cve/CVE-2017-18635
- https://security-tracker.debian.org/tracker/CVE-2017-18635
- https://ubuntu.com/security/CVE-2017-18635
Frequently Asked Questions
What is the severity of CVE-2017-18635?
The severity of CVE-2017-18635 is medium with a CVSS score of 6.1.
How can an attacker exploit CVE-2017-18635?
An attacker can exploit CVE-2017-18635 by injecting arbitrary HTML into the noVNC web page.
What versions of noVNC are affected by CVE-2017-18635?
Versions before 0.6.2 of noVNC are affected by CVE-2017-18635.
How can the vulnerability in noVNC be fixed?
To fix the vulnerability in noVNC, update to version 0.6.2 or above.
Are there any references for CVE-2017-18635?
Yes, you can find references for CVE-2017-18635 at the following links: [Link 1](https://github.com/novnc/noVNC/issues/748), [Link 2](https://github.com/novnc/noVNC/commit/6048299a138e078aed210f163111698c8c526a13#diff-286f7dc7b881e942e97cd50c10898f03L534), [Link 3](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1765662).
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