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AUSCERT External Security Bulletin Redistribution
ESB-2020.2657
libvncserver security update
4 August 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: libvncserver
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Red Hat Enterprise Linux WS/Desktop 7
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-18922
Reference: ESB-2020.2469
Original Bulletin:
https://access.redhat.com/errata/RHSA-2020:3281
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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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