RHEL 6 : tigervnc (RHSA-2017:0630)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

An update for tigervnc is now available for Red Hat Enterprise Linux
6.

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

Virtual Network Computing (VNC) is a remote display system which
allows users to view a computing desktop environment not only on the
machine where it is running, but from anywhere on the Internet and
from a wide variety of machine architectures. TigerVNC is a suite of
VNC servers and clients. The tigervnc packages contain a client which
allows users to connect to other desktops running a VNC server.

Security Fix(es) :

* A denial of service flaw was found in the TigerVNC's Xvnc server. A
remote unauthenticated attacker could use this flaw to make Xvnc crash
by terminating the TLS handshake process early. (CVE-2016-10207)

* A buffer overflow flaw, leading to memory corruption, was found in
TigerVNC viewer. A remote malicious VNC server could use this flaw to
crash the client vncviewer process resulting in denial of service.
(CVE-2017-5581)

Additional Changes :

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 6.9 Release Notes and Red Hat Enterprise Linux 6.9
Technical Notes linked from the References section.

See also :

https://www.redhat.com/security/data/cve/CVE-2016-10207.html
https://www.redhat.com/security/data/cve/CVE-2017-5581.html
http://www.nessus.org/u?cfcf474c
http://rhn.redhat.com/errata/RHSA-2017-0630.html

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 6.8
(CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 5.0
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 97876 ()

Bugtraq ID:

CVE ID: CVE-2016-10207
CVE-2017-5581

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