RHSA-2020:3456 - Security Advisory

Topic

An update for libvncserver is now available for Red Hat Enterprise Linux 8.1 Extended Update Support.

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.

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.

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

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.1 x86_64
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.1 ppc64le
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.1 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.1 x86_64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.1 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.1 ppc64le
• Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support 8.1 s390x
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.1 aarch64

Fixes

• BZ - 1852356 - CVE-2017-18922 libvncserver: websocket decoding buffer overflow

CVEs

• CVE-2017-18922

References

• https://access.redhat.com/security/updates/classification/#important