CVE-2021-38495

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 Thunderbird 78.13.0. 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 < 91.1 and Firefox ESR < 91.1.

References

https://www.mozilla.org/security/advisories/mfsa2021-41/

https://www.mozilla.org/security/advisories/mfsa2021-40/

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1723391%2C1723920%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

Tenable Plugins

View all (11 total)

IDNameProductFamilySeverity
154912Amazon Linux 2 : thunderbird (ALAS-2021-1720)NessusAmazon 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
154193openSUSE 15 Security Update : MozillaFirefox (openSUSE-SU-2021:3451-1)NessusSuSE Local Security Checks
critical
154182SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2021:3451-1)NessusSuSE Local Security Checks
critical
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
153840SUSE SLES11 Security Update : MozillaFirefox (SUSE-SU-2021:14821-1)NessusSuSE Local Security Checks
high
153576SUSE SLED12 / SLES12 Security Update : MozillaFirefox (SUSE-SU-2021:3191-1)NessusSuSE Local Security Checks
high
153106Mozilla Firefox ESR < 91.1NessusMacOS X Local Security Checks
high
153105Mozilla Firefox ESR < 91.1NessusWindows
high