Security Advisory

CVE-2021-43529

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2023-02-16 00:00:00

Last updated 2025-03-19 15:00:31

Assigner mozilla

State PUBLISHED

Description

Thunderbird versions prior to 91.3.0 are vulnerable to the heap overflow described in CVE-2021-43527 when processing S/MIME messages. Thunderbird versions 91.3.0 and later will not call the vulnerable code when processing S/MIME messages that contain certificates with DER-encoded DSA or RSA-PSS signatures.

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