Oracle Linux 8 : tigervnc (ELSA-2021-1783)

high Nessus Plugin ID 149917
New! Plugin Severity Now Using CVSS v3

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Synopsis

The remote Oracle Linux host is missing a security update.

Description

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2021-1783 advisory.

- In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions. They store the certificates as authorities, meaning that the owner of a certificate could impersonate any server after a client had added an exception. (CVE-2020-26117)

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

Solution

Update the affected packages.

See Also

https://linux.oracle.com/errata/ELSA-2021-1783.html

Plugin Details

Severity: High

ID: 149917

File Name: oraclelinux_ELSA-2021-1783.nasl

Version: 1.2

Type: local

Agent: unix

Published: 5/26/2021

Updated: 5/26/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-26117

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:oracle:linux:8, p-cpe:/a:oracle:linux:tigervnc, p-cpe:/a:oracle:linux:tigervnc-icons, p-cpe:/a:oracle:linux:tigervnc-license, p-cpe:/a:oracle:linux:tigervnc-selinux, p-cpe:/a:oracle:linux:tigervnc-server, p-cpe:/a:oracle:linux:tigervnc-server-minimal, p-cpe:/a:oracle:linux:tigervnc-server-module

Required KB Items: Host/OracleLinux, Host/RedHat/release, Host/RedHat/rpm-list, Host/local_checks_enabled

Exploit Ease: No known exploits are available

Patch Publication Date: 5/25/2021

Vulnerability Publication Date: 9/27/2020

Reference Information

CVE: CVE-2020-26117