# CVE-2023-0547: Mozilla Thunderbird and 1 other: Improper Certificate Validation

CVE-2023-0547 is fixed in 7 products on 2 platforms, first by thunderbird 1:102.10.0+build2-0ubuntu0.18.04.1, released April 11, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-0547
- Priority: High
- CVSS: 7.5 (Important)
- EPSS: 0.0037
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 11, 2023
- Weakness: CWE-295: Improper Certificate Validation
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2023-0547

## Description

OCSP revocation status of recipient certificates was not checked when sending S/Mime encrypted email, and revoked certificates would be accepted. Thunderbird versions from 68 to 102.9.1 were affected by this bug. This vulnerability affects Thunderbird < 102.10.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Mozilla Thunderbird (en-US) | 115.8.0 | [Mozilla Thunderbird (en-US) 115.8.0](https://patchblox.com/security/data/fix/windows-app/mozilla.thunderbird-115.8.0.md) | Feb 21, 2024 |
| Linux | thunderbird Debian 11.6 (bullseye) | 1:102.10.0-1~deb11u1 | [DSA-5392-1](https://patchblox.com/security/data/fix/linux/dsa-5392-1.md) | Apr 22, 2023 |
| Linux | thunderbird Debian 12.15 (bookworm) | 1:102.10.0-1 | [DEBIAN-CVE-2023-0547](https://patchblox.com/security/data/fix/linux/debian-cve-2023-0547.md) | Jun 2, 2023 |
| Linux | thunderbird Debian 13.5 (trixie) | 1:102.10.0-1 | [DEBIAN-CVE-2023-0547](https://patchblox.com/security/data/fix/linux/debian-cve-2023-0547.md) | Jun 2, 2023 |
| Linux | thunderbird Debian 14 | 1:102.10.0-1 | [DEBIAN-CVE-2023-0547](https://patchblox.com/security/data/fix/linux/debian-cve-2023-0547.md) | Jun 2, 2023 |
| Linux | thunderbird RHEL 8 | 0:102.10.0-2.el8_7 | [RHSA-2023:1802](https://patchblox.com/security/data/fix/linux/rhsa-2023-1802.md) | Apr 17, 2023 |
| Linux | thunderbird RHEL 9 | 0:102.10.0-2.el9_1 | [RHSA-2023:1809](https://patchblox.com/security/data/fix/linux/rhsa-2023-1809.md) | Apr 17, 2023 |
| Linux | thunderbird Ubuntu 18.04.6 LTS (bionic) | 1:102.10.0+build2-0ubuntu0.18.04.1 | [thunderbird 1:102.10.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-1-102.10.0-build2-0ubuntu0.18.04.1.md) | Apr 11, 2023 |
| Linux | thunderbird Ubuntu 20.04 LTS (focal) | 1:102.10.0+build2-0ubuntu0.20.04.1 | [thunderbird 1:102.10.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-1-102.10.0-build2-0ubuntu0.20.04.1.md) | Apr 11, 2023 |
| Linux | thunderbird Ubuntu 22.04.1 LTS (jammy) | 1:102.10.0+build2-0ubuntu0.22.04.1 | [thunderbird 1:102.10.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-1-102.10.0-build2-0ubuntu0.22.04.1.md) | Apr 11, 2023 |
| Linux | thunderbird almalinux 8 | 102.10.0-2.el8_7.alma | [ALSA-2023:1802](https://patchblox.com/security/data/fix/linux/alsa-2023-1802.md) | Apr 17, 2023 |
| Linux | thunderbird almalinux 9 | 102.10.0-2.el9_1.alma | [ALSA-2023:1809](https://patchblox.com/security/data/fix/linux/alsa-2023-1809.md) | Apr 17, 2023 |
| Linux | thunderbird ol 8 | 0:102.10.0-2.0.1.el8_7 | [ELSA-2023-1802](https://patchblox.com/security/data/fix/linux/elsa-2023-1802.md) | Apr 18, 2023 |
| Linux | thunderbird ol 9 | 0:102.10.0-2.0.1.el9_1 | [ELSA-2023-1809](https://patchblox.com/security/data/fix/linux/elsa-2023-1809.md) | Apr 18, 2023 |
| Linux | thunderbird rocky 8 | 0:102.10.0-2.el8_7 | [RLSA-2023:1802](https://patchblox.com/security/data/fix/linux/rlsa-2023-1802.md) | Apr 26, 2023 |
| Linux | thunderbird rocky 9 | 0:102.10.0-2.el9_1 | [RLSA-2023:1809](https://patchblox.com/security/data/fix/linux/rlsa-2023-1809.md) | Apr 26, 2023 |
| Linux | thunderbird-gnome-support Ubuntu 18.04.6 LTS (bionic) | 1:102.10.0+build2-0ubuntu0.18.04.1 | [thunderbird-gnome-support 1:102.10.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-102.10.0-build2-0ubuntu0.18.04.1.md) | Apr 11, 2023 |
| Linux | thunderbird-gnome-support Ubuntu 20.04 LTS (focal) | 1:102.10.0+build2-0ubuntu0.20.04.1 | [thunderbird-gnome-support 1:102.10.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-102.10.0-build2-0ubuntu0.20.04.1.md) | Apr 11, 2023 |
| Linux | thunderbird-gnome-support Ubuntu 22.04.1 LTS (jammy) | 1:102.10.0+build2-0ubuntu0.22.04.1 | [thunderbird-gnome-support 1:102.10.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-gnome-support-1-102.10.0-build2-0ubuntu0.22.04.1.md) | Apr 11, 2023 |
| Linux | thunderbird-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 1:102.10.0+build2-0ubuntu0.18.04.1 | [thunderbird-mozsymbols 1:102.10.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-102.10.0-build2-0ubuntu0.18.04.1.md) | Apr 11, 2023 |
| Linux | thunderbird-mozsymbols Ubuntu 20.04 LTS (focal) | 1:102.10.0+build2-0ubuntu0.20.04.1 | [thunderbird-mozsymbols 1:102.10.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-102.10.0-build2-0ubuntu0.20.04.1.md) | Apr 11, 2023 |
| Linux | thunderbird-mozsymbols Ubuntu 22.04.1 LTS (jammy) | 1:102.10.0+build2-0ubuntu0.22.04.1 | [thunderbird-mozsymbols 1:102.10.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-mozsymbols-1-102.10.0-build2-0ubuntu0.22.04.1.md) | Apr 11, 2023 |
| Linux | xul-ext-calendar-timezones Ubuntu 18.04.6 LTS (bionic) | 1:102.10.0+build2-0ubuntu0.18.04.1 | [xul-ext-calendar-timezones 1:102.10.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-102.10.0-build2-0ubuntu0.18.04.1.md) | Apr 11, 2023 |
| Linux | xul-ext-calendar-timezones Ubuntu 20.04 LTS (focal) | 1:102.10.0+build2-0ubuntu0.20.04.1 | [xul-ext-calendar-timezones 1:102.10.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-102.10.0-build2-0ubuntu0.20.04.1.md) | Apr 11, 2023 |
| Linux | xul-ext-calendar-timezones Ubuntu 22.04.1 LTS (jammy) | 1:102.10.0+build2-0ubuntu0.22.04.1 | [xul-ext-calendar-timezones 1:102.10.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-calendar-timezones-1-102.10.0-build2-0ubuntu0.22.04.1.md) | Apr 11, 2023 |
| Linux | xul-ext-gdata-provider Ubuntu 18.04.6 LTS (bionic) | 1:102.10.0+build2-0ubuntu0.18.04.1 | [xul-ext-gdata-provider 1:102.10.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-102.10.0-build2-0ubuntu0.18.04.1.md) | Apr 11, 2023 |
| Linux | xul-ext-gdata-provider Ubuntu 20.04 LTS (focal) | 1:102.10.0+build2-0ubuntu0.20.04.1 | [xul-ext-gdata-provider 1:102.10.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-102.10.0-build2-0ubuntu0.20.04.1.md) | Apr 11, 2023 |
| Linux | xul-ext-gdata-provider Ubuntu 22.04.1 LTS (jammy) | 1:102.10.0+build2-0ubuntu0.22.04.1 | [xul-ext-gdata-provider 1:102.10.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-gdata-provider-1-102.10.0-build2-0ubuntu0.22.04.1.md) | Apr 11, 2023 |
| Linux | xul-ext-lightning Ubuntu 18.04.6 LTS (bionic) | 1:102.10.0+build2-0ubuntu0.18.04.1 | [xul-ext-lightning 1:102.10.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-lightning-1-102.10.0-build2-0ubuntu0.18.04.1.md) | Apr 11, 2023 |
| Linux | xul-ext-lightning Ubuntu 20.04 LTS (focal) | 1:102.10.0+build2-0ubuntu0.20.04.1 | [xul-ext-lightning 1:102.10.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-lightning-1-102.10.0-build2-0ubuntu0.20.04.1.md) | Apr 11, 2023 |
| Linux | xul-ext-lightning Ubuntu 22.04.1 LTS (jammy) | 1:102.10.0+build2-0ubuntu0.22.04.1 | [xul-ext-lightning 1:102.10.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-lightning-1-102.10.0-build2-0ubuntu0.22.04.1.md) | Apr 11, 2023 |

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