Rocky Linux 8 : tigervnc (RLSA-2021:1783)

high Nessus Plugin ID 184868

Synopsis

The remote Rocky Linux host is missing a security update.

Description

The remote Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-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.

Plugin Details

Severity: High

ID: 184868

File Name: rocky_linux_RLSA-2021-1783.nasl

Version: 1.0

Type: local

Family: Rocky Linux Local Security Checks

Published: 11/7/2023

Updated: 11/7/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

CVSS Score Source: CVE-2020-26117

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: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/18/2021

Vulnerability Publication Date: 9/27/2020

Reference Information

CVE: CVE-2020-26117

Detections

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