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Use of a Broken or Risky Cryptographic Algorithm Affecting thunderbird package, versions <1:78.10.0-1~deb10u1

0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Integrity High

    Threat Intelligence

    EPSS 0.08% (32nd percentile)
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NVD
6.5 medium
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Red Hat
6.5 medium

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  • Snyk ID SNYK-DEBIAN10-THUNDERBIRD-1245141
  • published 13 Apr 2021
  • disclosed 24 Jun 2021
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Introduced: 13 Apr 2021

CVE-2021-23993 Open this link in a new tab
CWE-327 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.

An attacker may perform a DoS attack to prevent a user from sending encrypted email to a correspondent. If an attacker creates a crafted OpenPGP key with a subkey that has an invalid self signature, and the Thunderbird user imports the crafted key, then Thunderbird may try to use the invalid subkey, but the RNP library rejects it from being used, causing encryption to fail. This vulnerability affects Thunderbird < 78.9.1.