Home/CVE/An XSS vulnerability was discovered in noVNC before 0.6.2 in which the remote VNC server could inject arbitrary HTML int
CVE

CVE-2017-18635

An XSS vulnerability was discovered in noVNC before 0.6.2 in which the remote VNC server could inject arbitrary HTML int

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.

MEDIUM · CVSS 6.1 EPSS 0.06495
Schedule remediation
  • EPSS percentile: top 9% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

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

Affected Products & Versions

4
novnc< 0.6.2
debian linuxall versions
canonical ubuntu linuxall versions
redhat openstackall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
npm @novnc/novnc MODERATE fixed in 0.6.2
⚠

Public Exploits & PoCs

1
pocwww.shielder.it · exploiting-an-old-novnc-xss-cve-2017-18635-in-openstackwww.shielder.it
▣

Scoring & Timeline

6.1
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD25 Sep 2019 · 11:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
⚑

Vendor Advisories

3
usnUSN-4522-1
rhsaRHSA-2020:3247Moderate
rhsaRHSA-2020:0754Moderate
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugs.launchpad.net/horizon/+bug/1656435Issue TrackingThird Party Advisory
https://github.com/ShielderSec/cve-2017-18635Third Party Advisory
https://github.com/novnc/noVNC/commit/6048299a138e078aed210f163111698c8c526a13#diff-286f7dc7b881e942e97cd50c10898f03L534PatchThird Party Advisory
https://github.com/novnc/noVNC/issues/748PatchThird Party Advisory
https://github.com/novnc/noVNC/releases/tag/v0.6.2Release NotesThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00004.htmlMailing ListThird Party Advisory
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