Cleartext transmission of sensitive information in Mozilla Thunderbird - CVE-2021-38502

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Main Vulnerability Database Vulnerabilities #VU57241

Cleartext transmission of sensitive information in Mozilla Thunderbird - CVE-2021-38502

Published: October 12, 2021


Vulnerability identifier: #VU57241
CSH Severity: Medium
CVSS v4 BT: 5 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-38502
CWE-ID: CWE-319
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to software ignores the configuration to require STARTTLS security for an SMTP connection. A remote attacker with ability to intercept network traffic can gain access to sensitive data.


Affected software

Mozilla Thunderbird
CentOS
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Anolis OS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - AUS
SUSE Linux Enterprise Workstation Extension
Ubuntu
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
thunderbird (Red Hat package)
MozillaThunderbird
MozillaThunderbird-debuginfo
MozillaThunderbird-debugsource
MozillaThunderbird-translations-common
MozillaThunderbird-translations-other
thunderbird (Debian package)
thunderbird (Ubuntu package)
thunderbird

How to mitigate CVE-2021-38502

Install updates from vendor's website.

Mozilla Thunderbird - update to 91.2.0
thunderbird (Red Hat package) - addressed in versions 91.2.0-1.el7_9, 91.2.0-1.el8_1, 91.2.0-1.el8_2, 91.2.0-1.el8_4
MozillaThunderbird - update to 91.4.0-8.45.2
MozillaThunderbird-debuginfo - update to 91.4.0-8.45.2
MozillaThunderbird-debugsource - update to 91.4.0-8.45.2
MozillaThunderbird-translations-common - update to 91.4.0-8.45.2
MozillaThunderbird-translations-other - update to 91.4.0-8.45.2
thunderbird (Debian package) - addressed in versions 1:91.4.1-1~deb10u1, 1:91.4.1-1~deb11u1
thunderbird (Ubuntu package) - addressed in versions 1:91.5.0+build1-0ubuntu0.18.04.1, 1:91.5.0+build1-0ubuntu0.20.04.1
thunderbird - update to 91.6.0-1.0.1

External References

Related Security Bulletins