Improper Verification of Cryptographic Signature Affecting thunderbird package, versions <0:78.9.1-1.el8_3


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.08% (35th percentile)

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  • Snyk IDSNYK-CENTOS8-THUNDERBIRD-2091711
  • published26 Jul 2021
  • disclosed8 Apr 2021

Introduced: 8 Apr 2021

CVE-2021-23993  (opens in a new tab)
CWE-347  (opens in a new tab)

How to fix?

Upgrade Centos:8 thunderbird to version 0:78.9.1-1.el8_3 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 Centos. See How to fix? for Centos:8 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