Vulnerability · Published Jun 24, 2021 · Assigned by mozilla

CVE-2021-29956

Medium 4.3

In plain English

A medium-severity security flaw in Thunderbird from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)4.3Medium

Exploit odds (30 days)0.8%top 42.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

OpenPGP secret keys that were imported using Thunderbird version 78.8.1 up to version 78.10.1 were stored unencrypted on the user's local disk. The master password protection was inactive for those keys. Version 78.10.2 will restore the protection mechanism for newly imported keys, and will automatically protect keys that had been imported using affected Thunderbird versions. This vulnerability affects Thunderbird < 78.10.2.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Alpine:v3.20	thunderbird	91.3.2-r0	ALPINE-CVE-2021-29956
Alpine:v3.21	thunderbird	91.3.2-r0	ALPINE-CVE-2021-29956
Alpine:v3.22	thunderbird	91.3.2-r0	ALPINE-CVE-2021-29956
Alpine:v3.23	thunderbird	91.3.2-r0	ALPINE-CVE-2021-29956
Debian:12	thunderbird	1:78.10.2-1	DEBIAN-CVE-2021-29956
Debian:13	thunderbird	1:78.10.2-1	DEBIAN-CVE-2021-29956
Debian:14	thunderbird	1:78.10.2-1	DEBIAN-CVE-2021-29956
Rocky Linux:8	thunderbird	0:78.11.0-1.el8_4	RLSA-2021:2264

Affected products (as reported)

Vendor	Product	Versions
Mozilla	Thunderbird	unspecified – before 78.10.2

References

https://www.mozilla.org/security/advisories/mfsa2021-22/ x_refsource_MISC
https://bugzilla.mozilla.org/show_bug.cgi?id=1710290 x_refsource_MISC