CVE-2020-26950

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

In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1675905

https://www.mozilla.org/security/advisories/mfsa2020-49/

Details

Source: MITRE

Published: 2020-12-09

Updated: 2020-12-09

Type: CWE-416

Risk Information

CVSS v2

Base Score: 9.3

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

Impact Score: 10

Exploitability Score: 8.6

Severity: HIGH

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:*:*:*:*:*:*:*:*

cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*

cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

Tenable Plugins

View all (48 total)

IDNameProductFamilySeverity
150609SUSE SLES11 Security Update : MozillaFirefox (SUSE-SU-2020:14542-1)NessusSuSE Local Security Checks
high
149335NewStart CGSL CORE 5.04 / MAIN 5.04 : thunderbird Multiple Vulnerabilities (NS-SA-2021-0025)NessusNewStart CGSL Local Security Checks
high
147407NewStart CGSL MAIN 4.06 : firefox Multiple Vulnerabilities (NS-SA-2021-0004)NessusNewStart CGSL Local Security Checks
critical
147399NewStart CGSL CORE 5.04 / MAIN 5.04 : firefox Multiple Vulnerabilities (NS-SA-2021-0018)NessusNewStart CGSL Local Security Checks
high
147352NewStart CGSL MAIN 6.02 : firefox Multiple Vulnerabilities (NS-SA-2021-0065)NessusNewStart CGSL Local Security Checks
high
147312NewStart CGSL MAIN 4.06 : thunderbird Multiple Vulnerabilities (NS-SA-2021-0002)NessusNewStart CGSL Local Security Checks
critical
147286NewStart CGSL MAIN 6.02 : thunderbird Multiple Vulnerabilities (NS-SA-2021-0081)NessusNewStart CGSL Local Security Checks
high
144199RHEL 8 : thunderbird (RHSA-2020:5166)NessusRed Hat Local Security Checks
high
143880SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2020:3312-1)NessusSuSE Local Security Checks
high
143843SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2020:3311-1)NessusSuSE Local Security Checks
high
143799SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2020:3331-1)NessusSuSE Local Security Checks
high
143586Amazon Linux 2 : thunderbird (ALAS-2020-1572)NessusAmazon Linux Local Security Checks
high
143521openSUSE Security Update : MozillaThunderbird (openSUSE-2020-2133)NessusSuSE Local Security Checks
high
143295openSUSE Security Update : MozillaThunderbird (openSUSE-2020-2022)NessusSuSE Local Security Checks
high
143267Ubuntu 20.10 : Thunderbird vulnerabilities (USN-4647-1)NessusUbuntu Local Security Checks
high
143246Scientific Linux Security Update : thunderbird on SL6.x i686/x86_64 (2020:5164)NessusScientific Linux Local Security Checks
high
143201Oracle Linux 6 : thunderbird (ELSA-2020-5164)NessusOracle Linux Local Security Checks
high
143197Oracle Linux 7 : thunderbird (ELSA-2020-5163)NessusOracle Linux Local Security Checks
high
143163RHEL 8 : thunderbird (RHSA-2020:5167)NessusRed Hat Local Security Checks
high
143162RHEL 8 : thunderbird (RHSA-2020:5162)NessusRed Hat Local Security Checks
high
143161RHEL 6 : thunderbird (RHSA-2020:5164)NessusRed Hat Local Security Checks
high
143160RHEL 7 : thunderbird (RHSA-2020:5163)NessusRed Hat Local Security Checks
high
143118Oracle Linux 8 : thunderbird (ELSA-2020-5146)NessusOracle Linux Local Security Checks
high
143114CentOS 7 : firefox (CESA-2020:5099)NessusCentOS Local Security Checks
high
143054RHEL 8 : thunderbird (RHSA-2020:5146)NessusRed Hat Local Security Checks
high
143044Scientific Linux Security Update : firefox on SL6.x i686/x86_64 (2020:5104)NessusScientific Linux Local Security Checks
high
143000Scientific Linux Security Update : firefox on SL7.x i686/x86_64 (2020:5099)NessusScientific Linux Local Security Checks
high
142994RHEL 8 : firefox (RHSA-2020:5135)NessusRed Hat Local Security Checks
high
142992RHEL 8 : firefox (RHSA-2020:5138)NessusRed Hat Local Security Checks
high
142972RHEL 8 : firefox (RHSA-2020:5139)NessusRed Hat Local Security Checks
high
142965Oracle Linux 8 : firefox (ELSA-2020-5100)NessusOracle Linux Local Security Checks
high
142956openSUSE Security Update : MozillaFirefox (openSUSE-2020-1909)NessusSuSE Local Security Checks
high
142951Debian DSA-4790-1 : thunderbird - security updateNessusDebian Local Security Checks
high
142948openSUSE Security Update : MozillaFirefox (openSUSE-2020-1919)NessusSuSE Local Security Checks
high
142918Debian DLA-2449-1 : thunderbird security updateNessusDebian Local Security Checks
high
142896Oracle Linux 6 : firefox (ELSA-2020-5104)NessusOracle Linux Local Security Checks
high
142877Oracle Linux 7 : firefox (ELSA-2020-5099)NessusOracle Linux Local Security Checks
high
142871RHEL 7 : firefox (RHSA-2020:5099)NessusRed Hat Local Security Checks
high
142864RHEL 6 : firefox (RHSA-2020:5104)NessusRed Hat Local Security Checks
high
142863RHEL 8 : firefox (RHSA-2020:5100)NessusRed Hat Local Security Checks
high
142858Debian DSA-4788-1 : firefox-esr - security updateNessusDebian Local Security Checks
high
142849Debian DLA-2448-1 : firefox-esr security updateNessusDebian Local Security Checks
high
142844GLSA-202011-07 : Mozilla Firefox: Remote code executionNessusGentoo Local Security Checks
high
142730Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 20.10 : Firefox vulnerability (USN-4625-1)NessusUbuntu Local Security Checks
high
142613Mozilla Firefox < 82.0.3NessusWindows
high
142612Mozilla Firefox ESR < 78.4.1NessusMacOS X Local Security Checks
high
142611Mozilla Firefox ESR < 78.4.1NessusWindows
high
142610Mozilla Firefox < 82.0.3NessusMacOS X Local Security Checks
high