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Improper Verification of Cryptographic Signature The advisory has been revoked - it doesn't affect any version of package thunderbird  (opens in a new tab)

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EPSS
1.29% (70th percentile)

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  • Snyk IDSNYK-UBUNTU1904-THUNDERBIRD-535719
  • published29 Sept 2019
  • disclosed27 Sept 2019
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Introduced: 27 Sep 2019

CVE-2019-11755  (opens in a new tab)
CWE-347  (opens in a new tab)

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:19.04.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by Ubuntu.

A crafted S/MIME message consisting of an inner encryption layer and an outer SignedData layer was shown as having a valid digital signature, although the signer might have had no access to the contents of the encrypted message, and might have stripped a different signature from the encrypted message. Previous versions had only suppressed showing a digital signature for messages with an outer multipart/signed layer. This vulnerability affects Thunderbird < 68.1.1.