CVE-2021-43529
Publication date 16 February 2023
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
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.
Status
Package | Ubuntu Release | Status |
---|---|---|
thunderbird | ||
22.04 LTS jammy |
Not affected
|
|
20.04 LTS focal |
Fixed 1:91.5.0+build1-0ubuntu0.20.04.1
|
|
18.04 LTS bionic |
Fixed 1:91.5.0+build1-0ubuntu0.18.04.1
|
|
16.04 LTS xenial | Ignored end of standard support | |
14.04 LTS trusty | Ignored end of standard support |
Severity score breakdown
Parameter | Value |
---|---|
Base score |
|
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |