# CVE-2023-3417: File Extension Spoofing using the Text Direction Override Character CVE-2023-3417 is fixed in 7 products on 2 platforms, first by DEBIAN-CVE-2023-3417, released July 24, 2023. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2023-3417 - Priority: High - CVSS: 7.5 (high) - EPSS: 0.0067 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jul 24, 2023 - Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2023-3417 ## Description Thunderbird allowed the Text Direction Override Unicode Character in filenames. An email attachment could be incorrectly shown as being a document file, while in fact it was an executable file. Newer versions of Thunderbird will strip the character and show the correct file extension. This vulnerability affects Thunderbird < 115.0.1 and Thunderbird < 102.13.1. ## 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) | 1:102.13.1-1~deb11u1 | [DSA-5463-1](https://patchblox.com/security/data/fix/linux/dsa-5463-1.md) | Jul 30, 2023 | | Linux | thunderbird Debian 12.15 (bookworm) | 1:102.13.1-1~deb12u1 | [DSA-5463-1](https://patchblox.com/security/data/fix/linux/dsa-5463-1.md) | Jul 30, 2023 | | Linux | thunderbird Debian 13.5 (trixie) | 1:102.13.1-1 | [DEBIAN-CVE-2023-3417](https://patchblox.com/security/data/fix/linux/debian-cve-2023-3417.md) | Jul 24, 2023 | | Linux | thunderbird Debian 14 | 1:102.13.1-1 | [DEBIAN-CVE-2023-3417](https://patchblox.com/security/data/fix/linux/debian-cve-2023-3417.md) | Jul 24, 2023 | | Linux | thunderbird RHEL 8 | 0:102.14.0-1.el8_8 | [RHSA-2023:4497](https://patchblox.com/security/data/fix/linux/rhsa-2023-4497.md) | Aug 7, 2023 | | Linux | thunderbird RHEL 9 | 0:102.14.0-1.el9_2 | [RHSA-2023:4499](https://patchblox.com/security/data/fix/linux/rhsa-2023-4499.md) | Aug 7, 2023 | | Linux | thunderbird Ubuntu 20.04 LTS (focal) | 1:102.15.0+build1-0ubuntu0.20.04.1 | [thunderbird 1:102.15.0+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-1-102.15.0-build1-0ubuntu0.20.04.1.md) | Aug 1, 2023 | | Linux | thunderbird Ubuntu 22.04.1 LTS (jammy) | 1:102.15.0+build1-0ubuntu0.22.04.1 | [thunderbird 1:102.15.0+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-1-102.15.0-build1-0ubuntu0.22.04.1.md) | Aug 1, 2023 | | Linux | thunderbird almalinux 8 | 102.14.0-1.el8_8.alma | [ALSA-2023:4497](https://patchblox.com/security/data/fix/linux/alsa-2023-4497.md) | Aug 7, 2023 | | Linux | thunderbird almalinux 9 | 102.14.0-1.el9_2.alma | [ALSA-2023:4499](https://patchblox.com/security/data/fix/linux/alsa-2023-4499.md) | Aug 7, 2023 | | Linux | thunderbird ol 8 | 0:102.14.0-1.0.1.el8_8 | [ELSA-2023-4497](https://patchblox.com/security/data/fix/linux/elsa-2023-4497.md) | Aug 9, 2023 | | Linux | thunderbird ol 9 | 0:102.14.0-1.0.1.el9_2 | [ELSA-2023-4499](https://patchblox.com/security/data/fix/linux/elsa-2023-4499.md) | Aug 8, 2023 | | Linux | thunderbird rocky 8 | 0:102.14.0-1.el8_8 | [RLSA-2023:4497](https://patchblox.com/security/data/fix/linux/rlsa-2023-4497.md) | Aug 8, 2023 | | Linux | thunderbird rocky 9 | 0:102.14.0-1.el9_2 | [RLSA-2023:4499](https://patchblox.com/security/data/fix/linux/rlsa-2023-4499.md) | Aug 8, 2023 | | Linux | thunderbird-gnome-support Ubuntu 20.04 LTS (focal) | 1:102.15.0+build1-0ubuntu0.20.04.1 | [thunderbird-gnome-support 1:102.15.0+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-102.15.0-build1-0ubuntu0.20.04.1.md) | Aug 1, 2023 | | Linux | thunderbird-gnome-support Ubuntu 22.04.1 LTS (jammy) | 1:102.15.0+build1-0ubuntu0.22.04.1 | [thunderbird-gnome-support 1:102.15.0+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-gnome-support-1-102.15.0-build1-0ubuntu0.22.04.1.md) | Aug 1, 2023 | | Linux | thunderbird-mozsymbols Ubuntu 20.04 LTS (focal) | 1:102.15.0+build1-0ubuntu0.20.04.1 | [thunderbird-mozsymbols 1:102.15.0+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-102.15.0-build1-0ubuntu0.20.04.1.md) | Aug 1, 2023 | | Linux | thunderbird-mozsymbols Ubuntu 22.04.1 LTS (jammy) | 1:102.15.0+build1-0ubuntu0.22.04.1 | [thunderbird-mozsymbols 1:102.15.0+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-mozsymbols-1-102.15.0-build1-0ubuntu0.22.04.1.md) | Aug 1, 2023 | | Linux | xul-ext-calendar-timezones Ubuntu 20.04 LTS (focal) | 1:102.15.0+build1-0ubuntu0.20.04.1 | [xul-ext-calendar-timezones 1:102.15.0+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-102.15.0-build1-0ubuntu0.20.04.1.md) | Aug 1, 2023 | | Linux | xul-ext-calendar-timezones Ubuntu 22.04.1 LTS (jammy) | 1:102.15.0+build1-0ubuntu0.22.04.1 | [xul-ext-calendar-timezones 1:102.15.0+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-calendar-timezones-1-102.15.0-build1-0ubuntu0.22.04.1.md) | Aug 1, 2023 | | Linux | xul-ext-gdata-provider Ubuntu 20.04 LTS (focal) | 1:102.15.0+build1-0ubuntu0.20.04.1 | [xul-ext-gdata-provider 1:102.15.0+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-102.15.0-build1-0ubuntu0.20.04.1.md) | Aug 1, 2023 | | Linux | xul-ext-gdata-provider Ubuntu 22.04.1 LTS (jammy) | 1:102.15.0+build1-0ubuntu0.22.04.1 | [xul-ext-gdata-provider 1:102.15.0+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-gdata-provider-1-102.15.0-build1-0ubuntu0.22.04.1.md) | Aug 1, 2023 | | Linux | xul-ext-lightning Ubuntu 20.04 LTS (focal) | 1:102.15.0+build1-0ubuntu0.20.04.1 | [xul-ext-lightning 1:102.15.0+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-lightning-1-102.15.0-build1-0ubuntu0.20.04.1.md) | Aug 1, 2023 | | Linux | xul-ext-lightning Ubuntu 22.04.1 LTS (jammy) | 1:102.15.0+build1-0ubuntu0.22.04.1 | [xul-ext-lightning 1:102.15.0+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-lightning-1-102.15.0-build1-0ubuntu0.22.04.1.md) | Aug 1, 2023 | --- Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.