CentOS 8 : firefox (CESA-2020:5237)

high Nessus Plugin ID 145963


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


The remote CentOS Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the CESA-2020:5237 advisory.

- Mozilla: Variable time processing of cross-origin images during drawImage calls (CVE-2020-16012)

- Mozilla: Parsing mismatches could confuse and bypass security sanitizer for chrome privileged code (CVE-2020-26951)

- Mozilla: Fullscreen could be enabled without displaying the security UI (CVE-2020-26953)

- Mozilla: XSS through paste (manual and clipboard API) (CVE-2020-26956)

- Mozilla: Requests intercepted through ServiceWorkers lacked MIME type restrictions (CVE-2020-26958)

- Mozilla: Use-after-free in WebRequestService (CVE-2020-26959)

- Mozilla: Potential use-after-free in uses of nsTArray (CVE-2020-26960)

- Mozilla: DoH did not filter IPv4 mapped IP Addresses (CVE-2020-26961)

- Mozilla: Software keyboards may have remembered typed passwords (CVE-2020-26965)

- Mozilla: Memory safety bugs fixed in Firefox 83 and Firefox ESR 78.5 (CVE-2020-26968)

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


Update the affected firefox package.

See Also


Plugin Details

Severity: High

ID: 145963

File Name: centos8_RHSA-2020-5237.nasl

Version: 1.4

Type: local

Agent: unix

Published: 2/1/2021

Updated: 3/23/2021

Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure

Risk Information


Risk Factor: High

Score: 7.4


Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

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

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

CVSS Score Source: CVE-2020-26968


Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:firefox

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/30/2020

Vulnerability Publication Date: 11/17/2020

Reference Information

CVE: CVE-2020-16012, CVE-2020-26951, CVE-2020-26953, CVE-2020-26956, CVE-2020-26958, CVE-2020-26959, CVE-2020-26960, CVE-2020-26961, CVE-2020-26965, CVE-2020-26968

RHSA: 2020:5237