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CVE-2021-23991 Affecting thunderbird package, versions <1:78.10.0-1~deb10u1

0.0
medium

Snyk CVSS

    Attack Complexity High
    User Interaction Required
    Confidentiality High
    Integrity High

    Threat Intelligence

    EPSS 0.19% (57th percentile)
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NVD
6.8 medium
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Red Hat
6.8 medium
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SUSE
4.3 medium

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  • Snyk ID SNYK-DEBIAN10-THUNDERBIRD-1245143
  • published 13 Apr 2021
  • disclosed 24 Jun 2021
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Introduced: 13 Apr 2021

CVE-2021-23991 Open this link in a new tab

How to fix?

Upgrade Debian:10 thunderbird to version 1:78.10.0-1~deb10u1 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 Debian. See How to fix? for Debian: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.