4.3 - RHSA-2015:0833

Problem Description:

An updated novnc package that fixes one security issue is now available for Red Hat Enterprise Linux OpenStack Platform 5.0 for Red Hat Enterprise Linux 6.

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux OpenStack Platform 5.0 for RHEL 6 - noarch

3. Description:

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

It was discovered that noVNC did not properly set the 'secure' flag when issuing cookies. An attacker could use this flaw to intercept cookies via a man-in-the-middle attack. (CVE-2013-7436)

All novnc users are advised to upgrade to this updated package, which corrects this issue.

4. 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

5. Bugs fixed (https://bugzilla.redhat.com/):

1193451 - CVE-2013-7436 novnc: session hijack through insecurely set session token cookies