Use of a Broken or Risky Cryptographic Algorithm Affecting thunderbird package, versions <0:78.10.0-1.amzn2.0.1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.08% (35th percentile)

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  • Snyk IDSNYK-AMZN2-THUNDERBIRD-1699160
  • published27 Sept 2021
  • disclosed24 Jun 2021

Introduced: 24 Jun 2021

CVE-2021-23993  (opens in a new tab)
CWE-327  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 thunderbird to version 0:78.10.0-1.amzn2.0.1 or higher.
This issue was patched in ALAS2-2021-1644.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 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.

CVSS Scores

version 3.1