CVE-2021-38502

medium
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

Thunderbird ignored the configuration to require STARTTLS security for an SMTP connection. A MITM could perform a downgrade attack to intercept transmitted messages, or could take control of the authenticated session to execute SMTP commands chosen by the MITM. If an unprotected authentication method was configured, the MITM could obtain the authentication credentials, too. This vulnerability affects Thunderbird < 91.2.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1733366

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

https://www.debian.org/security/2022/dsa-5034

https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html

Details

Source: MITRE

Published: 2021-11-03

Updated: 2022-01-04

Type: CWE-522

Risk Information

CVSS v2

Base Score: 4.3

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

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 5.9

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Impact Score: 3.6

Exploitability Score: 2.2

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

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

Tenable Plugins

View all (16 total)

IDNameProductFamilySeverity
156457Debian DLA-2874-1 : thunderbird - LTS security updateNessusDebian Local Security Checks
critical
156451Debian DSA-5034-1 : thunderbird - security updateNessusDebian Local Security Checks
critical
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
154353Oracle Linux 7 : thunderbird (ELSA-2021-3841)NessusOracle Linux Local Security Checks
high
154201Scientific Linux Security Update : thunderbird on SL7.x x86_64 (2021:3841)NessusScientific Linux Local Security Checks
high
154176Oracle Linux 8 : thunderbird (ELSA-2021-3838)NessusOracle Linux Local Security Checks
high
154158CentOS 8 : thunderbird (CESA-2021:3838)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
154059Mozilla Thunderbird < 91.2NessusWindows
high
154058Mozilla Thunderbird < 91.2NessusMacOS X Local Security Checks
high