A libvncserver security update has been released for Red Hat Enterprise Linux 8 to fix an issue that HandleCursorShape() integer overflow resulting in heap-based buffer overflow.

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Red Hat Security Advisory

Synopsis: Important: libvncserver security update
Advisory ID: RHSA-2020:0920-01
Product: Red Hat Enterprise Linux
Advisory URL:   https://access.redhat.com/errata/RHSA-2020:0920
Issue date: 2020-03-23
CVE Names: CVE-2019-15690
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1. Summary:

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

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 CodeReady Linux Builder (v. 8) - aarch64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux AppStream (v. 8) - ppc64le, x86_64

3. Description:

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

Security Fix(es):

* libvncserver: HandleCursorShape() integer overflow resulting in
heap-based buffer overflow (CVE-2019-15690)

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/):

1811948 - CVE-2019-15690 libvncserver: HandleCursorShape() integer overflow resulting in heap-based buffer overflow

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

Source:
libvncserver-0.9.11-9.el8_1.2.src.rpm

ppc64le:
libvncserver-0.9.11-9.el8_1.2.ppc64le.rpm
libvncserver-debuginfo-0.9.11-9.el8_1.2.ppc64le.rpm
libvncserver-debugsource-0.9.11-9.el8_1.2.ppc64le.rpm

x86_64:
libvncserver-0.9.11-9.el8_1.2.i686.rpm
libvncserver-0.9.11-9.el8_1.2.x86_64.rpm
libvncserver-debuginfo-0.9.11-9.el8_1.2.i686.rpm
libvncserver-debuginfo-0.9.11-9.el8_1.2.x86_64.rpm
libvncserver-debugsource-0.9.11-9.el8_1.2.i686.rpm
libvncserver-debugsource-0.9.11-9.el8_1.2.x86_64.rpm

Red Hat CodeReady Linux Builder (v. 8):

Source:
libvncserver-0.9.11-9.el8_1.2.src.rpm

aarch64:
libvncserver-0.9.11-9.el8_1.2.aarch64.rpm
libvncserver-debuginfo-0.9.11-9.el8_1.2.aarch64.rpm
libvncserver-debugsource-0.9.11-9.el8_1.2.aarch64.rpm
libvncserver-devel-0.9.11-9.el8_1.2.aarch64.rpm

ppc64le:
libvncserver-debuginfo-0.9.11-9.el8_1.2.ppc64le.rpm
libvncserver-debugsource-0.9.11-9.el8_1.2.ppc64le.rpm
libvncserver-devel-0.9.11-9.el8_1.2.ppc64le.rpm

s390x:
libvncserver-0.9.11-9.el8_1.2.s390x.rpm
libvncserver-debuginfo-0.9.11-9.el8_1.2.s390x.rpm
libvncserver-debugsource-0.9.11-9.el8_1.2.s390x.rpm
libvncserver-devel-0.9.11-9.el8_1.2.s390x.rpm

x86_64:
libvncserver-debuginfo-0.9.11-9.el8_1.2.i686.rpm
libvncserver-debuginfo-0.9.11-9.el8_1.2.x86_64.rpm
libvncserver-debugsource-0.9.11-9.el8_1.2.i686.rpm
libvncserver-debugsource-0.9.11-9.el8_1.2.x86_64.rpm
libvncserver-devel-0.9.11-9.el8_1.2.i686.rpm
libvncserver-devel-0.9.11-9.el8_1.2.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-2019-15690
  https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2020 Red Hat, Inc.