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Red Hat Security Advisory

Synopsis: Important: libvncserver security update
Advisory ID: RHSA-2020:3281-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3281
Issue date: 2020-08-03
CVE Names: CVE-2017-18922
=====================================================================

1. Summary:

An update for libvncserver is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact
of Important. 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 Client (v. 7) – x86_64
Red Hat Enterprise Linux Client Optional (v. 7) – x86_64
Red Hat Enterprise Linux Server (v. 7) – ppc64le, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) – ppc64le, x86_64
Red Hat Enterprise Linux Workstation (v. 7) – x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) – x86_64

3. Description:

LibVNCServer is a C library that enables you to implement VNC server
functionality into own programs.

Security Fix(es):

* libvncserver: websocket decoding buffer overflow (CVE-2017-18922)

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.

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/):

1852356 – CVE-2017-18922 libvncserver: websocket decoding buffer overflow

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
libvncserver-0.9.9-14.el7_8.1.src.rpm

x86_64:
libvncserver-0.9.9-14.el7_8.1.i686.rpm
libvncserver-0.9.9-14.el7_8.1.x86_64.rpm
libvncserver-debuginfo-0.9.9-14.el7_8.1.i686.rpm
libvncserver-debuginfo-0.9.9-14.el7_8.1.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
libvncserver-debuginfo-0.9.9-14.el7_8.1.i686.rpm
libvncserver-debuginfo-0.9.9-14.el7_8.1.x86_64.rpm
libvncserver-devel-0.9.9-14.el7_8.1.i686.rpm
libvncserver-devel-0.9.9-14.el7_8.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
libvncserver-0.9.9-14.el7_8.1.src.rpm

ppc64le:
libvncserver-0.9.9-14.el7_8.1.ppc64le.rpm
libvncserver-debuginfo-0.9.9-14.el7_8.1.ppc64le.rpm

x86_64:
libvncserver-0.9.9-14.el7_8.1.i686.rpm
libvncserver-0.9.9-14.el7_8.1.x86_64.rpm
libvncserver-debuginfo-0.9.9-14.el7_8.1.i686.rpm
libvncserver-debuginfo-0.9.9-14.el7_8.1.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

ppc64le:
libvncserver-debuginfo-0.9.9-14.el7_8.1.ppc64le.rpm
libvncserver-devel-0.9.9-14.el7_8.1.ppc64le.rpm

x86_64:
libvncserver-debuginfo-0.9.9-14.el7_8.1.i686.rpm
libvncserver-debuginfo-0.9.9-14.el7_8.1.x86_64.rpm
libvncserver-devel-0.9.9-14.el7_8.1.i686.rpm
libvncserver-devel-0.9.9-14.el7_8.1.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
libvncserver-0.9.9-14.el7_8.1.src.rpm

x86_64:
libvncserver-0.9.9-14.el7_8.1.i686.rpm
libvncserver-0.9.9-14.el7_8.1.x86_64.rpm
libvncserver-debuginfo-0.9.9-14.el7_8.1.i686.rpm
libvncserver-debuginfo-0.9.9-14.el7_8.1.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
libvncserver-debuginfo-0.9.9-14.el7_8.1.i686.rpm
libvncserver-debuginfo-0.9.9-14.el7_8.1.x86_64.rpm
libvncserver-devel-0.9.9-14.el7_8.1.i686.rpm
libvncserver-devel-0.9.9-14.el7_8.1.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2017-18922
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2020 Red Hat, Inc.
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