CVE-2021-38501

high
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 92 and Firefox ESR 91.1. 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 < 93, Thunderbird < 91.2, and Firefox ESR < 91.2.

References

https://www.mozilla.org/security/advisories/mfsa2021-43/

https://www.mozilla.org/security/advisories/mfsa2021-45/

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1685354%2C1715755%2C1723176

https://www.mozilla.org/security/advisories/mfsa2021-47/

Details

Source: MITRE

Published: 2021-11-03

Updated: 2021-11-04

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

Tenable Plugins

View all (36 total)

IDNameProductFamilySeverity
156561Ubuntu 21.10 : Thunderbird vulnerabilities (USN-5132-1)NessusUbuntu Local Security Checks
high
156395openSUSE 15 Security Update : MozillaThunderbird (openSUSE-SU-2021:1635-1)NessusSuSE Local Security Checks
critical
156292SUSE SLED15 / SLES15 Security Update : MozillaThunderbird (SUSE-SU-2021:4150-1)NessusSuSE Local Security Checks
critical
156271openSUSE 15 Security Update : MozillaThunderbird (openSUSE-SU-2021:4150-1)NessusSuSE Local Security Checks
critical
155552CentOS 7 : thunderbird (CESA-2021:3841)NessusCentOS Local Security Checks
high
155551CentOS 7 : firefox (CESA-2021:3791)NessusCentOS Local Security Checks
high
154353Oracle Linux 7 : thunderbird (ELSA-2021-3841)NessusOracle Linux Local Security Checks
high
154341Oracle Linux 7 : firefox (ELSA-2021-3791)NessusOracle Linux Local Security Checks
high
154214openSUSE 15 Security Update : MozillaFirefox (openSUSE-SU-2021:1367-1)NessusSuSE Local Security Checks
critical
154212SUSE SLES11 Security Update : MozillaFirefox, rust-cbindgen (SUSE-SU-2021:14826-1)NessusSuSE Local Security Checks
critical
154202Scientific Linux Security Update : firefox on SL7.x i686/x86_64 (2021:3791)NessusScientific Linux Local Security Checks
high
154201Scientific Linux Security Update : thunderbird on SL7.x x86_64 (2021:3841)NessusScientific Linux Local Security Checks
high
154193openSUSE 15 Security Update : MozillaFirefox (openSUSE-SU-2021:3451-1)NessusSuSE Local Security Checks
critical
154183SUSE SLED12 / SLES12 Security Update : MozillaFirefox (SUSE-SU-2021:3446-1)NessusSuSE Local Security Checks
critical
154182SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2021:3451-1)NessusSuSE Local Security Checks
critical
154176Oracle Linux 8 : thunderbird (ELSA-2021-3838)NessusOracle Linux Local Security Checks
high
154158CentOS 8 : thunderbird (CESA-2021:3838)NessusCentOS Local Security Checks
high
154156CentOS 8 : firefox (CESA-2021:3755)NessusCentOS Local Security Checks
high
154143RHEL 8 : thunderbird (RHSA-2021:3840)NessusRed Hat Local Security Checks
high
154136RHEL 8 : thunderbird (RHSA-2021:3839)NessusRed Hat Local Security Checks
high
154135RHEL 8 : thunderbird (RHSA-2021:3838)NessusRed Hat Local Security Checks
high
154134RHEL 7 : thunderbird (RHSA-2021:3841)NessusRed Hat Local Security Checks
high
154077RHEL 7 : firefox (RHSA-2021:3791)NessusRed Hat Local Security Checks
high
154059Mozilla Thunderbird < 91.2NessusWindows
high
154058Mozilla Thunderbird < 91.2NessusMacOS X Local Security Checks
high
154024RHEL 8 : firefox (RHSA-2021:3757)NessusRed Hat Local Security Checks
high
154023RHEL 8 : firefox (RHSA-2021:3756)NessusRed Hat Local Security Checks
high
154022RHEL 8 : firefox (RHSA-2021:3755)NessusRed Hat Local Security Checks
high
154011openSUSE 15 Security Update : MozillaFirefox (openSUSE-SU-2021:3331-1)NessusSuSE Local Security Checks
critical
154003SUSE SLES15 Security Update : MozillaFirefox (SUSE-SU-2021:3331-1)NessusSuSE Local Security Checks
critical
153997Oracle Linux 8 : firefox (ELSA-2021-3755)NessusOracle Linux Local Security Checks
high
153925Ubuntu 18.04 LTS / 20.04 LTS / 21.04 : Firefox vulnerabilities (USN-5107-1)NessusUbuntu Local Security Checks
high
153881Mozilla Firefox < 93.0NessusWindows
high
153880Mozilla Firefox < 93.0NessusMacOS X Local Security Checks
high
153879Mozilla Firefox ESR < 91.2NessusMacOS X Local Security Checks
high
153878Mozilla Firefox ESR < 91.2NessusWindows
high