CVE-2021-23991 Affecting thunderbird package, versions <1:78.11.0+build1-0ubuntu2


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.19% (59th percentile)

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  • Snyk IDSNYK-UBUNTU2110-THUNDERBIRD-1737582
  • published6 May 2021
  • disclosed24 Jun 2021

Introduced: 6 May 2021

CVE-2021-23991  (opens in a new tab)

How to fix?

Upgrade Ubuntu:21.10 thunderbird to version 1:78.11.0+build1-0ubuntu2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by Ubuntu. See How to fix? for Ubuntu:21.10 relevant fixed versions and status.

If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has not yet been imported, an attacker may send an email containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt to use the invalid subkey, and will fail to send encrypted email to Alice. This vulnerability affects Thunderbird < 78.9.1.

CVSS Scores

version 3.1