CVE-2021-23987high
New! CVE Severity Now Using CVSS v3
The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.
Description
Mozilla developers and community members reported memory safety bugs present in Firefox 86 and Firefox ESR 78.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.
References
https://www.mozilla.org/security/advisories/mfsa2021-11/
https://www.mozilla.org/security/advisories/mfsa2021-12/
https://www.mozilla.org/security/advisories/mfsa2021-10/
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1513519%2C1683439%2C1690169%2C1690718
Details
Source: MITRE
Published: 2021-03-31
Updated: 2021-08-06
Type: CWE-119
Risk Information
CVSS v2
Base Score: 6.8
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 8.6
Severity: MEDIUM
CVSS v3
Base Score: 8.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 2.8
Severity: HIGH
Vulnerable Software
Configuration 1
OR
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Tenable Plugins
| ID | Name | Product | Family | Severity |
|---|---|---|---|---|
| 151017 | Ubuntu 18.04 LTS : Thunderbird vulnerabilities (USN-4995-2) | Nessus | Ubuntu Local Security Checks | high |
| 150949 | Ubuntu 20.04 LTS / 20.10 : Thunderbird vulnerabilities (USN-4995-1) | Nessus | Ubuntu Local Security Checks | high |
| 150566 | SUSE SLES11 Security Update : MozillaFirefox (SUSE-SU-2021:14684-1) | Nessus | SuSE Local Security Checks | high |
| 149555 | openSUSE Security Update : MozillaThunderbird (openSUSE-2021-580) | Nessus | SuSE Local Security Checks | high |
| 149233 | GLSA-202104-10 : Mozilla Firefox: Multiple vulnerabilities | Nessus | Gentoo Local Security Checks | high |
| 149226 | GLSA-202104-09 : Mozilla Thunderbird: Multiple vulnerabilities | Nessus | Gentoo Local Security Checks | high |
| 148913 | Amazon Linux 2 : thunderbird (ALAS-2021-1632) | Nessus | Amazon Linux Local Security Checks | high |
| 148308 | openSUSE Security Update : MozillaFirefox (openSUSE-2021-487) | Nessus | SuSE Local Security Checks | high |
| 148304 | SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2021:1007-1) | Nessus | SuSE Local Security Checks | high |
| 148276 | SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2021:0999-1) | Nessus | SuSE Local Security Checks | high |
| 148235 | Debian DSA-4876-1 : thunderbird - security update | Nessus | Debian Local Security Checks | high |
| 148226 | SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2021:0966-1) | Nessus | SuSE Local Security Checks | high |
| 148206 | Debian DLA-2609-1 : thunderbird security update | Nessus | Debian Local Security Checks | high |
| 148188 | CentOS 8 : firefox (CESA-2021:0990) | Nessus | CentOS Local Security Checks | high |
| 148187 | CentOS 8 : thunderbird (CESA-2021:0993) | Nessus | CentOS Local Security Checks | high |
| 148185 | CentOS 7 : thunderbird (CESA-2021:0996) | Nessus | CentOS Local Security Checks | high |
| 148184 | CentOS 7 : firefox (CESA-2021:0992) | Nessus | CentOS Local Security Checks | high |
| 148183 | Oracle Linux 8 : firefox (ELSA-2021-0990) | Nessus | Oracle Linux Local Security Checks | high |
| 148181 | Oracle Linux 8 : thunderbird (ELSA-2021-0993) | Nessus | Oracle Linux Local Security Checks | high |
| 148169 | Debian DSA-4874-1 : firefox-esr - security update | Nessus | Debian Local Security Checks | high |
| 148166 | Debian DLA-2607-1 : firefox-esr security update | Nessus | Debian Local Security Checks | high |
| 148135 | Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 20.10 : Firefox vulnerabilities (USN-4893-1) | Nessus | Ubuntu Local Security Checks | high |
| 148134 | Oracle Linux 7 : thunderbird (ELSA-2021-0996) | Nessus | Oracle Linux Local Security Checks | high |
| 148127 | Oracle Linux 7 : firefox (ELSA-2021-0992) | Nessus | Oracle Linux Local Security Checks | high |
| 148121 | RHEL 8 : thunderbird (RHSA-2021:0994) | Nessus | Red Hat Local Security Checks | high |
| 148120 | RHEL 8 : firefox (RHSA-2021:0990) | Nessus | Red Hat Local Security Checks | high |
| 148119 | RHEL 8 : firefox (RHSA-2021:0991) | Nessus | Red Hat Local Security Checks | high |
| 148118 | RHEL 8 : firefox (RHSA-2021:0989) | Nessus | Red Hat Local Security Checks | high |
| 148116 | RHEL 8 : thunderbird (RHSA-2021:0993) | Nessus | Red Hat Local Security Checks | high |
| 148115 | RHEL 8 : thunderbird (RHSA-2021:0995) | Nessus | Red Hat Local Security Checks | high |
| 148114 | RHEL 7 : firefox (RHSA-2021:0992) | Nessus | Red Hat Local Security Checks | high |
| 148113 | RHEL 7 : thunderbird (RHSA-2021:0996) | Nessus | Red Hat Local Security Checks | high |
| 148110 | Mozilla Thunderbird < 78.9 | Nessus | Windows | high |
| 148109 | Mozilla Thunderbird < 78.9 | Nessus | MacOS X Local Security Checks | high |
| 148015 | Mozilla Firefox < 87.0 | Nessus | MacOS X Local Security Checks | high |
| 148014 | Mozilla Firefox < 87.0 | Nessus | Windows | high |
| 148013 | Mozilla Firefox ESR < 78.9 | Nessus | MacOS X Local Security Checks | high |
| 148012 | Mozilla Firefox ESR < 78.9 | Nessus | Windows | high |