CVE-2021-43529

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.

Score

CVSS 3.1 9.8 Critical

Status

Modified - security@mozilla.org

Published

2023-02-16

Last modified

2025-03-19

Weaknesses

CWE-787

Affected products

• Thunderbird (Mozilla)

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2021-43529