RHSA-2020:0754 - Security Advisory

Topic

An updated novnc package that fixes one security issue is now available for
Red Hat Enterprise Linux OpenStack Platform 13.0.

Red Hat Product Security has rated this update as having Moderate security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.

Description

The novnc package provides a VNC client that uses HTML5 (Web Sockets, Canvas) and includes encryption support.

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). (CVE-2017-18635)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat OpenStack for IBM Power 13 ppc64le
• Red Hat OpenStack 13 x86_64

Fixes

• BZ - 1484711 - [OSP13] rebase novnc to 1.1.0
• BZ - 1765660 - CVE-2017-18635 novnc: XSS vulnerability via the messages propagated to the status field

CVEs

• CVE-2017-18635

References

• https://access.redhat.com/security/updates/classification/#moderate