Executive Summary

Summary
Title tigervnc security and bug fix update
Informations
Name RHSA-2017:0630 First vendor Publication 2017-03-21
Vendor RedHat Last vendor Modification 2017-03-21
Severity (Vendor) N/A Revision 01

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:P)
Cvss Base Score 6.8 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem 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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, noarch, x86_64 Red Hat Enterprise Linux HPC Node Optional (v. 6) - noarch, x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 6) - i386, noarch, ppc64, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, noarch, x86_64

3. Description:

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.

4. Solution:

For details on how to apply this update, which includes the changes described in this advisory, refer to:

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

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

1323065 - tigervnc cannot build against xorg-x11-server-source 1378922 - tigervnc-server needs to be rebuilt to re-enable listen-on-tcp behavior in RHEL 6.8 1390458 - New version of tigervnc-server disconnects Xsession when initiated from xinetd 1415712 - CVE-2017-5581 tigervnc: Buffer overflow in ModifiablePixelBuffer::fillRect 1418761 - CVE-2016-10207 tigervnc: VNC server can crash when TLS handshake terminates early

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2017-0630.html

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-119 Failure to Constrain Operations within the Bounds of a Memory Buffer

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 12
Os 2

Nessus® Vulnerability Scanner

Date Description
2018-01-12 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201801-13.nasl - Type : ACT_GATHER_INFO
2017-09-11 Name : The remote EulerOS host is missing multiple security updates.
File : EulerOS_SA-2017-1227.nasl - Type : ACT_GATHER_INFO
2017-09-11 Name : The remote EulerOS host is missing multiple security updates.
File : EulerOS_SA-2017-1228.nasl - Type : ACT_GATHER_INFO
2017-09-01 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2017-879.nasl - Type : ACT_GATHER_INFO
2017-08-25 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2017-2000.nasl - Type : ACT_GATHER_INFO
2017-08-22 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20170801_tigervnc_and_fltk_on_SL7_x.nasl - Type : ACT_GATHER_INFO
2017-08-09 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2017-2000.nasl - Type : ACT_GATHER_INFO
2017-08-02 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2017-2000.nasl - Type : ACT_GATHER_INFO
2017-04-06 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20170321_tigervnc_on_SL6_x.nasl - Type : ACT_GATHER_INFO
2017-03-30 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2017-0630.nasl - Type : ACT_GATHER_INFO
2017-03-27 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2017-0630.nasl - Type : ACT_GATHER_INFO
2017-03-22 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2017-0630.nasl - Type : ACT_GATHER_INFO
2017-03-08 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0622-1.nasl - Type : ACT_GATHER_INFO
2017-02-21 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201702-19.nasl - Type : ACT_GATHER_INFO
2017-02-21 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0519-1.nasl - Type : ACT_GATHER_INFO
2017-02-13 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2017-243.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2017-03-31 13:22:46
  • Multiple Updates
2017-03-28 13:25:26
  • Multiple Updates
2017-03-23 13:24:15
  • Multiple Updates
2017-03-21 13:24:03
  • First insertion