Bug 1765660 (CVE-2017-18635)

Summary:	CVE-2017-18635 novnc: XSS vulnerability via the messages propagated to the status field
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	apevec, dbecker, dblechte, dfediuck, eedri, eglynn, gkadam, jjoyce, jschluet, kbasil, lhh, lpeer, lsurette, lyarwood, mburns, mgoldboi, michal.skrivanek, mwitt, sbonazzo, sclewis, sherold, slinaber, srevivo, sross, tony, yturgema
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	novnc 0.6.2	Doc Type:	If docs needed, set a value
Doc Text:	An XSS vulnerability was discovered in noVNC in which arbitrary HTML could be injected into the noVNC web page. An attacker having access to a VNC server could use target host values in a crafted URL to gain access to secure information (such as VM tokens).	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-03-10 16:31:49 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1765663, 1765661, 1765662, 1767695, 1767696, 1767697, 1788343
Bug Blocks:	1765669

Description Guilherme de Almeida Suckevicz 2019-10-25 16:48:42 UTC

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.

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

Upstream commit:
https://github.com/novnc/noVNC/commit/6048299a138e078aed210f163111698c8c526a13#diff-286f7dc7b881e942e97cd50c10898f03L534

Comment 1 Guilherme de Almeida Suckevicz 2019-10-25 16:49:00 UTC

Created novnc tracking bugs for this issue:

Affects: epel-all [bug 1765662]
Affects: fedora-all [bug 1765661]
Affects: openstack-rdo [bug 1765663]

Comment 3 Summer Long 2019-11-01 05:03:16 UTC

External References:

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

Comment 5 Summer Long 2019-11-01 05:48:37 UTC

Mitigation:

There is no known mitigation for this issue, the flaw can only be resolved by applying updates.

Comment 7 errata-xmlrpc 2020-03-10 11:20:49 UTC

This issue has been addressed in the following products:

  Red Hat OpenStack Platform 13.0 (Queens)
  Red Hat OpenStack Platform 13.0 (Queens) for RHEL 7.6 EUS

Via RHSA-2020:0754 https://access.redhat.com/errata/RHSA-2020:0754

Comment 8 Product Security DevOps Team 2020-03-10 16:31:49 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2017-18635

Comment 9 errata-xmlrpc 2020-08-04 13:15:37 UTC

This issue has been addressed in the following products:

  Red Hat Virtualization Engine 4.4

Via RHSA-2020:3247 https://access.redhat.com/errata/RHSA-2020:3247