CVE-2021-38493high
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 reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. 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 < 78.14, Thunderbird < 78.14, and Firefox < 92.
References
https://www.mozilla.org/security/advisories/mfsa2021-42/
https://www.mozilla.org/security/advisories/mfsa2021-38/
https://www.mozilla.org/security/advisories/mfsa2021-39/
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1723391%2C1724101%2C1724107
Details
Source: MITRE
Published: 2021-11-03
Updated: 2021-11-04
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 |
|---|---|---|---|---|
| 156395 | openSUSE 15 Security Update : MozillaThunderbird (openSUSE-SU-2021:1635-1) | Nessus | SuSE Local Security Checks | critical |
| 156292 | SUSE SLED15 / SLES15 Security Update : MozillaThunderbird (SUSE-SU-2021:4150-1) | Nessus | SuSE Local Security Checks | critical |
| 156271 | openSUSE 15 Security Update : MozillaThunderbird (openSUSE-SU-2021:4150-1) | Nessus | SuSE Local Security Checks | critical |
| 155308 | Ubuntu 18.04 LTS / 20.04 LTS / 21.04 : Thunderbird vulnerabilities (USN-5146-1) | Nessus | Ubuntu Local Security Checks | high |
| 154912 | Amazon Linux 2 : thunderbird (ALAS-2021-1720) | Nessus | Amazon Linux Local Security Checks | high |
| 153512 | Debian DSA-4973-1 : thunderbird - security update | Nessus | Debian Local Security Checks | high |
| 153473 | CentOS 7 : thunderbird (CESA-2021:3494) | Nessus | CentOS Local Security Checks | high |
| 153472 | CentOS 7 : firefox (CESA-2021:3498) | Nessus | CentOS Local Security Checks | high |
| 153412 | CentOS 8 : firefox (CESA-2021:3497) | Nessus | CentOS Local Security Checks | high |
| 153410 | CentOS 8 : thunderbird (CESA-2021:3499) | Nessus | CentOS Local Security Checks | high |
| 153242 | RHEL 8 : firefox (RHSA-2021:3501) | Nessus | Red Hat Local Security Checks | high |
| 153241 | Oracle Linux 7 : firefox (ELSA-2021-3498) | Nessus | Oracle Linux Local Security Checks | high |
| 153239 | Oracle Linux 8 : thunderbird (ELSA-2021-3499) | Nessus | Oracle Linux Local Security Checks | high |
| 153238 | RHEL 7 : firefox (RHSA-2021:3498) | Nessus | Red Hat Local Security Checks | high |
| 153237 | Oracle Linux 8 : firefox (ELSA-2021-3497) | Nessus | Oracle Linux Local Security Checks | high |
| 153236 | Oracle Linux 7 : thunderbird (ELSA-2021-3494) | Nessus | Oracle Linux Local Security Checks | high |
| 153235 | RHEL 8 : firefox (RHSA-2021:3497) | Nessus | Red Hat Local Security Checks | high |
| 153234 | RHEL 8 : firefox (RHSA-2021:3496) | Nessus | Red Hat Local Security Checks | high |
| 153232 | RHEL 8 : thunderbird (RHSA-2021:3495) | Nessus | Red Hat Local Security Checks | high |
| 153230 | RHEL 8 : thunderbird (RHSA-2021:3500) | Nessus | Red Hat Local Security Checks | high |
| 153229 | RHEL 8 : thunderbird (RHSA-2021:3499) | Nessus | Red Hat Local Security Checks | high |
| 153228 | RHEL 7 : thunderbird (RHSA-2021:3494) | Nessus | Red Hat Local Security Checks | high |
| 153227 | Scientific Linux Security Update : firefox on SL7.x i686/x86_64 (2021:3498) | Nessus | Scientific Linux Local Security Checks | high |
| 153226 | Debian DLA-2757-1 : thunderbird - LTS security update | Nessus | Debian Local Security Checks | high |
| 153225 | Scientific Linux Security Update : thunderbird on SL7.x x86_64 (2021:3494) | Nessus | Scientific Linux Local Security Checks | high |
| 153216 | Debian DLA-2756-1 : firefox-esr - LTS security update | Nessus | Debian Local Security Checks | high |
| 153202 | Debian DSA-4969-1 : firefox-esr - security update | Nessus | Debian Local Security Checks | high |
| 153183 | Ubuntu 18.04 LTS / 20.04 LTS / 21.04 : Firefox vulnerabilities (USN-5074-1) | Nessus | Ubuntu Local Security Checks | high |
| 153112 | Mozilla Thunderbird < 78.14 | Nessus | MacOS X Local Security Checks | high |
| 153111 | Mozilla Thunderbird < 78.14 | Nessus | Windows | high |
| 153091 | Mozilla Firefox ESR < 78.14 | Nessus | MacOS X Local Security Checks | high |
| 153090 | Mozilla Firefox ESR < 78.14 | Nessus | Windows | high |
| 153089 | Mozilla Firefox < 92.0 | Nessus | Windows | high |
| 153088 | Mozilla Firefox < 92.0 | Nessus | MacOS X Local Security Checks | high |