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CVE-2021-43529

Date: February 15, 2023

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.

Severity Score

Related Resources (6)

https://security-tracker.debian.org/tracker/CVE-2021-43529
https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2021-43529
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-43529
https://access.redhat.com/security/cve/CVE-2021-43529
https://nvd.nist.gov/vuln/detail/CVE-2021-43529
https://www.mend.io/vulnerability-database/CVE-2021-43529

Severity Score

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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