Scientific Linux Security Update : firefox on SL7.x i686/x86_64 (2021:3791)

high Nessus Plugin ID 154202


New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote Scientific Linux host is missing one or more security updates.


The remote Scientific Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the SLSA-2021:3791-1 advisory.

- Mozilla: Use-after-free in MessageTask (CVE-2021-38496)

- Mozilla: Memory safety bugs fixed in Firefox 93, Firefox ESR 78.15, and Firefox ESR 91.2 (CVE-2021-38500)

- Mozilla: Memory safety bugs fixed in Firefox 93 and Firefox ESR 91.2 (CVE-2021-38501)

- rust-crossbeam-deque: race condition may lead to double free (CVE-2021-32810)

- Mozilla: Validation message could have been overlaid on another origin (CVE-2021-38497)

- Mozilla: Use-after-free of nsLanguageAtomService object (CVE-2021-38498)

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 and / or firefox-debuginfo packages.

See Also

Plugin Details

Severity: High

ID: 154202

File Name: sl_20211012_firefox_on_SL7_x.nasl

Version: 1.3

Type: local

Agent: unix

Published: 10/18/2021

Updated: 11/5/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2021-38501


Risk Factor: Medium

Score: 6.7


Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

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


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:fermilab:scientific_linux, p-cpe:/a:fermilab:scientific_linux:firefox, p-cpe:/a:fermilab:scientific_linux:firefox-debuginfo

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/12/2021

Vulnerability Publication Date: 8/2/2021

Reference Information

CVE: CVE-2021-32810, CVE-2021-38496, CVE-2021-38497, CVE-2021-38498, CVE-2021-38500, CVE-2021-38501

IAVA: 2021-A-0450, 2021-A-0461

RHSA: RHSA-2021:3791