Cleartext storage of sensitive information in Mozilla Thunderbird - CVE-2021-29956

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Main Vulnerability Database Vulnerabilities #VU53308

Cleartext storage of sensitive information in Mozilla Thunderbird - CVE-2021-29956

Published: May 17, 2021 / Updated: June 7, 2021


Vulnerability identifier: #VU53308
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-29956
CWE-ID: CWE-312
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to OpenPGP secret keys that were imported using Thunderbird. were stored unencrypted on the user's local disk. The master password protection was inactive for those keys. A local user can gain access to sensitive information.


Affected software

Mozilla Thunderbird
Arch Linux
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 ARM 64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
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
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 (Debian package)
thunderbird (Red Hat package)
MozillaThunderbird
MozillaThunderbird-debuginfo
MozillaThunderbird-debugsource
MozillaThunderbird-translations-common
MozillaThunderbird-translations-other
thunderbird

How to mitigate CVE-2021-29956

Install updates from vendor's website.

Mozilla Thunderbird - update to 78.10.2
thunderbird (Debian package) - update to 78.11.0-1~deb10u1
thunderbird (Red Hat package) - addressed in versions 78.11.0-1.el7_9, 78.11.0-1.el8_1, 78.11.0-1.el8_2, 78.11.0-1.el8_4
MozillaThunderbird - update to 78.10.2-8.27.1
MozillaThunderbird-debuginfo - update to 78.10.2-8.27.1
MozillaThunderbird-debugsource - update to 78.10.2-8.27.1
MozillaThunderbird-translations-common - update to 78.10.2-8.27.1
MozillaThunderbird-translations-other - update to 78.10.2-8.27.1
thunderbird - update to 78.11.0-1.0.1

External References

Related Security Bulletins