Detections
Analytics

MiracleLinux 8 : libvncserver-0.9.11-17.el8 (AXSA:2021-2098:01)

high Nessus Plugin ID 294004

Synopsis

The remote MiracleLinux host is missing one or more security updates.

Description

The remote MiracleLinux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the AXSA:2021-2098:01 advisory.

 * 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)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected libvncserver package.

See Also

https://tsn.miraclelinux.com/en/node/13280

Plugin Details

Severity: High

ID: 294004

File Name: miracle_linux_AXSA-2021-2098.nasl

Version: 1.1

Type: local

Published: 1/20/2026

Updated: 1/20/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2018-21247

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:miracle:linux:libvncserver, cpe:/o:miracle:linux:8

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/MiracleLinux/release, Host/MiracleLinux/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/29/2021

Vulnerability Publication Date: 6/17/2020

Reference Information

CVE: CVE-2018-21247, CVE-2019-20839, CVE-2020-14397, CVE-2020-14405, CVE-2020-25708