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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: tigervnc security, bug fix, and enhancement update
Advisory ID:       RHSA-2021:1783-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:1783
Issue date:        2021-05-18
CVE Names:         CVE-2020-26117 
=====================================================================

1. Summary:

An update for tigervnc is now available for Red Hat Enterprise Linux 8.

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 AppStream (v. 8) - aarch64, noarch, ppc64le, s390x,
 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 following packages have been upgraded to a later upstream version:
tigervnc (1.11.0). (BZ#1880985)

Security Fix(es):

* tigervnc: certificate exceptions stored as authorities (CVE-2020-26117)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 8.4 Release 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/):

1841537 - StandardError doesn't work with Xvnc as socket activated service
1853608 - Fail to start tigervnc server
1880985 - Rebase tigervnc to 1.11.0
1882841 - CVE-2020-26117 tigervnc: certificate exceptions stored as authorities
1883415 - Tigervnc cannot use boolean values in config files
1897498 - Starting the xvnc service starts a vncsession process and goes into
 zombie state
1897504 - Add vncserver wrapper script again to allow non-root users to start
 and stop the service

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

Source:
tigervnc-1.11.0-6.el8.src.rpm

aarch64:
tigervnc-1.11.0-6.el8.aarch64.rpm
tigervnc-debuginfo-1.11.0-6.el8.aarch64.rpm
tigervnc-debugsource-1.11.0-6.el8.aarch64.rpm
tigervnc-server-1.11.0-6.el8.aarch64.rpm
tigervnc-server-debuginfo-1.11.0-6.el8.aarch64.rpm
tigervnc-server-minimal-1.11.0-6.el8.aarch64.rpm
tigervnc-server-minimal-debuginfo-1.11.0-6.el8.aarch64.rpm
tigervnc-server-module-1.11.0-6.el8.aarch64.rpm
tigervnc-server-module-debuginfo-1.11.0-6.el8.aarch64.rpm

noarch:
tigervnc-icons-1.11.0-6.el8.noarch.rpm
tigervnc-license-1.11.0-6.el8.noarch.rpm
tigervnc-selinux-1.11.0-6.el8.noarch.rpm

ppc64le:
tigervnc-1.11.0-6.el8.ppc64le.rpm
tigervnc-debuginfo-1.11.0-6.el8.ppc64le.rpm
tigervnc-debugsource-1.11.0-6.el8.ppc64le.rpm
tigervnc-server-1.11.0-6.el8.ppc64le.rpm
tigervnc-server-debuginfo-1.11.0-6.el8.ppc64le.rpm
tigervnc-server-minimal-1.11.0-6.el8.ppc64le.rpm
tigervnc-server-minimal-debuginfo-1.11.0-6.el8.ppc64le.rpm
tigervnc-server-module-1.11.0-6.el8.ppc64le.rpm
tigervnc-server-module-debuginfo-1.11.0-6.el8.ppc64le.rpm

s390x:
tigervnc-1.11.0-6.el8.s390x.rpm
tigervnc-debuginfo-1.11.0-6.el8.s390x.rpm
tigervnc-debugsource-1.11.0-6.el8.s390x.rpm
tigervnc-server-1.11.0-6.el8.s390x.rpm
tigervnc-server-debuginfo-1.11.0-6.el8.s390x.rpm
tigervnc-server-minimal-1.11.0-6.el8.s390x.rpm
tigervnc-server-minimal-debuginfo-1.11.0-6.el8.s390x.rpm
tigervnc-server-module-1.11.0-6.el8.s390x.rpm
tigervnc-server-module-debuginfo-1.11.0-6.el8.s390x.rpm

x86_64:
tigervnc-1.11.0-6.el8.x86_64.rpm
tigervnc-debuginfo-1.11.0-6.el8.x86_64.rpm
tigervnc-debugsource-1.11.0-6.el8.x86_64.rpm
tigervnc-server-1.11.0-6.el8.x86_64.rpm
tigervnc-server-debuginfo-1.11.0-6.el8.x86_64.rpm
tigervnc-server-minimal-1.11.0-6.el8.x86_64.rpm
tigervnc-server-minimal-debuginfo-1.11.0-6.el8.x86_64.rpm
tigervnc-server-module-1.11.0-6.el8.x86_64.rpm
tigervnc-server-module-debuginfo-1.11.0-6.el8.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-2020-26117
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/

8. Contact:

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

Copyright 2021 Red Hat, Inc.
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