CVE-2021-29976

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 code shared between Firefox and Thunderbird. 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 Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.

References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1700895%2C1703334%2C1706910%2C1711576%2C1714391

https://www.mozilla.org/security/advisories/mfsa2021-30/

https://www.mozilla.org/security/advisories/mfsa2021-29/

https://www.mozilla.org/security/advisories/mfsa2021-28/

Details

Source: MITRE

Published: 2021-08-05

Updated: 2021-08-12

Type: CWE-787

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 (39 total)

IDNameProductFamilySeverity
153417Amazon Linux 2 : thunderbird (ALAS-2021-1709)NessusAmazon Linux Local Security Checks
high
152953Ubuntu 18.04 LTS / 20.04 LTS / 21.04 : Thunderbird vulnerabilities (USN-5058-1)NessusUbuntu Local Security Checks
high
152219openSUSE 15 Security Update : MozillaThunderbird (openSUSE-SU-2021:1091-1)NessusSuSE Local Security Checks
high
152168CentOS 8 : thunderbird (CESA-2021:2883)NessusCentOS Local Security Checks
high
152113SUSE SLES15 Security Update : MozillaFirefox (SUSE-SU-2021:2478-1)NessusSuSE Local Security Checks
high
152097RHEL 8 : thunderbird (RHSA-2021:2914)NessusRed Hat Local Security Checks
high
152095Oracle Linux 7 : thunderbird (ELSA-2021-2881)NessusOracle Linux Local Security Checks
high
152093Oracle Linux 8 : thunderbird (ELSA-2021-2883)NessusOracle Linux Local Security Checks
high
152086Scientific Linux Security Update : thunderbird on SL7.x x86_64 (2021:2881)NessusScientific Linux Local Security Checks
high
152077RHEL 8 : thunderbird (RHSA-2021:2882)NessusRed Hat Local Security Checks
high
152076RHEL 8 : thunderbird (RHSA-2021:2883)NessusRed Hat Local Security Checks
high
152074RHEL 7 : thunderbird (RHSA-2021:2881)NessusRed Hat Local Security Checks
high
152023SUSE SLED15 / SLES15 Security Update : MozillaThunderbird (SUSE-SU-2021:2458-1)NessusSuSE Local Security Checks
high
152010openSUSE 15 Security Update : MozillaThunderbird (openSUSE-SU-2021:2458-1)NessusSuSE Local Security Checks
high
151841openSUSE 15 Security Update : MozillaFirefox (openSUSE-SU-2021:1066-1)NessusSuSE Local Security Checks
high
151820openSUSE 15 Security Update : MozillaFirefox (openSUSE-SU-2021:2393-1)NessusSuSE Local Security Checks
high
151813SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2021:2393-1)NessusSuSE Local Security Checks
high
151812Debian DLA-2711-1 : thunderbird - LTS security updateNessusDebian Local Security Checks
high
151807Debian DSA-4940-1 : thunderbird - security updateNessusDebian Local Security Checks
high
151805SUSE SLED12 / SLES12 Security Update : MozillaFirefox (SUSE-SU-2021:2389-1)NessusSuSE Local Security Checks
high
151803SUSE SLES11 Security Update : MozillaFirefox (SUSE-SU-2021:14766-1)NessusSuSE Local Security Checks
high
151800Ubuntu 18.04 LTS / 20.04 LTS / 20.10 / 21.04 : Firefox vulnerabilities (USN-5011-1)NessusUbuntu Local Security Checks
high
151797CentOS 8 : firefox (CESA-2021:2743)NessusCentOS Local Security Checks
high
151682Oracle Linux 7 : firefox (ELSA-2021-2741)NessusOracle Linux Local Security Checks
high
151681Oracle Linux 8 : firefox (ELSA-2021-2743)NessusOracle Linux Local Security Checks
high
151678Scientific Linux Security Update : firefox on SL7.x i686/x86_64 (2021:2741)NessusScientific Linux Local Security Checks
high
151677Debian DLA-2709-1 : firefox-esr - LTS security updateNessusDebian Local Security Checks
high
151674CentOS 7 : firefox (CESA-2021:2741)NessusCentOS Local Security Checks
high
151671RHEL 7 : firefox (RHSA-2021:2741)NessusRed Hat Local Security Checks
high
151670RHEL 8 : firefox (RHSA-2021:2740)NessusRed Hat Local Security Checks
high
151669RHEL 8 : firefox (RHSA-2021:2743)NessusRed Hat Local Security Checks
high
151668RHEL 8 : firefox (RHSA-2021:2742)NessusRed Hat Local Security Checks
high
151667Debian DSA-4939-1 : firefox-esr - security updateNessusDebian Local Security Checks
high
151613Mozilla Thunderbird < 78.12NessusWindows
high
151612Mozilla Thunderbird < 78.12NessusMacOS X Local Security Checks
high
151574Mozilla Firefox ESR < 78.12NessusWindows
high
151573Mozilla Firefox ESR < 78.12NessusMacOS X Local Security Checks
high
151572Mozilla Firefox < 90.0NessusMacOS X Local Security Checks
critical
151571Mozilla Firefox < 90.0NessusWindows
critical