Threat Encyclopedia

RHSA-2021:1811-Security Advisory

Description

The vulnerabilities in the following products could cause the system to become vulnerable to malicious security attack: libvncserver

Analysis

LibVNCServer is a C library that enables you to implement VNC server functionality into own programs. Security Fix(es): libvncserver: uninitialized memory contents are vulnerable to Information Leak (CVE-2018-21247) libvncserver: buffer overflow in ConnectClientToUnixSock() (CVE-2019-20839) libvncserver: libvncserver/rfbregion.c has a NULL pointer dereference (CVE-2020-14397) libvncserver: libvncclient/rfbproto.c does not limit TextChat size (CVE-2020-14405) libvncserver: libvncserver/rfbserver.c has a divide by zero which could result in DoS (CVE-2020-25708) libvncserver: uninitialized memory contents are vulnerable to Information Leak (CVE-2018-21247) libvncserver: buffer overflow in ConnectClientToUnixSock() (CVE-2019-20839) libvncserver: libvncserver/rfbregion.c has a NULL pointer dereference (CVE-2020-14397) libvncserver: libvncclient/rfbproto.c does not limit TextChat size (CVE-2020-14405) libvncserver: libvncserver/rfbserver.c has a divide by zero which could result in DoS (CVE-2020-25708) 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. SolutionFor 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

libvncserver