CVE-2021-23992

Description

Thunderbird did not check if the user ID associated with an OpenPGP key has a valid self signature. An attacker may create a crafted version of an OpenPGP key, by either replacing the original user ID, or by adding another user ID. If Thunderbird imports and accepts the crafted key, the Thunderbird user may falsely conclude that the false user ID belongs to the correspondent. This vulnerability affects Thunderbird < 78.9.1.

Category

4.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.09%
Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Thunderbird
Published at:
Updated at:

References

Link Tags
https://www.mozilla.org/security/advisories/mfsa2021-13/ release notes vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1666236 issue tracking permissions required vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-23992?
CVE-2021-23992 has been scored as a medium severity vulnerability.
How to fix CVE-2021-23992?
To fix CVE-2021-23992, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-23992 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-23992 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-23992?
CVE-2021-23992 affects Mozilla Thunderbird.
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