Security update for MozillaThunderbird SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2025:01660-2 Final 1 1 2025-05-29T09:33:54Z current 2025-05-29T09:33:54Z 2025-05-29T09:33:54Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for MozillaThunderbird This update for MozillaThunderbird fixes the following issues: Update to Mozilla Thunderbird 128.10.1. Security fixes: - MFSA 2025-34 (bsc#1243216) * CVE-2025-3875: Sender Spoofing via Malformed From Header in Thunderbird. * CVE-2025-3877: Unsolicited File Download, Disk Space Exhaustion, and Credential Leakage via mailbox:/// Links. * CVE-2025-3909: JavaScript Execution via Spoofed PDF Attachment and file:/// Link. * CVE-2025-3932: Tracking Links in Attachments Bypassed Remote Content Blocking. Other bug fixes: - Fixed: standalone message windows/tabs that no longer responded after folder compaction. - Fixed: Thunderbird could crash when importing Outlook messages. - Visual and UX improvements. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2025-1660,SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2025-1660,SUSE-SLE-Product-WE-15-SP7-2025-1660 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2025/suse-su-202501660-2/ Link for SUSE-SU-2025:01660-2 https://lists.suse.com/pipermail/sle-updates/2025-May/039396.html E-Mail link for SUSE-SU-2025:01660-2 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1243216 SUSE Bug 1243216 https://www.suse.com/security/cve/CVE-2025-3875/ SUSE CVE CVE-2025-3875 page https://www.suse.com/security/cve/CVE-2025-3877/ SUSE CVE CVE-2025-3877 page https://www.suse.com/security/cve/CVE-2025-3909/ SUSE CVE CVE-2025-3909 page https://www.suse.com/security/cve/CVE-2025-3932/ SUSE CVE CVE-2025-3932 page SUSE Linux Enterprise Module for Package Hub 15 SP7 SUSE Linux Enterprise Workstation Extension 15 SP7 MozillaThunderbird-128.10.1-150200.8.215.1 MozillaThunderbird-translations-common-128.10.1-150200.8.215.1 MozillaThunderbird-translations-other-128.10.1-150200.8.215.1 MozillaThunderbird-128.10.1-150200.8.215.1 as a component of SUSE Linux Enterprise Module for Package Hub 15 SP7 MozillaThunderbird-translations-common-128.10.1-150200.8.215.1 as a component of SUSE Linux Enterprise Module for Package Hub 15 SP7 MozillaThunderbird-translations-other-128.10.1-150200.8.215.1 as a component of SUSE Linux Enterprise Module for Package Hub 15 SP7 MozillaThunderbird-128.10.1-150200.8.215.1 as a component of SUSE Linux Enterprise Workstation Extension 15 SP7 MozillaThunderbird-translations-common-128.10.1-150200.8.215.1 as a component of SUSE Linux Enterprise Workstation Extension 15 SP7 MozillaThunderbird-translations-other-128.10.1-150200.8.215.1 as a component of SUSE Linux Enterprise Workstation Extension 15 SP7 Thunderbird parses addresses in a way that can allow sender spoofing in case the server allows an invalid From address to be used. For example, if the From header contains an (invalid) value "Spoofed Name ", Thunderbird treats spoofed@example.com as the actual address. This vulnerability affects Thunderbird < 128.10.1 and Thunderbird < 138.0.1. CVE-2025-3875 SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-128.10.1-150200.8.215.1 SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-translations-common-128.10.1-150200.8.215.1 SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-translations-other-128.10.1-150200.8.215.1 SUSE Linux Enterprise Workstation Extension 15 SP7:MozillaThunderbird-128.10.1-150200.8.215.1 SUSE Linux Enterprise Workstation Extension 15 SP7:MozillaThunderbird-translations-common-128.10.1-150200.8.215.1 SUSE Linux Enterprise Workstation Extension 15 SP7:MozillaThunderbird-translations-other-128.10.1-150200.8.215.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202501660-2/ https://www.suse.com/security/cve/CVE-2025-3875.html CVE-2025-3875 https://bugzilla.suse.com/1243216 SUSE Bug 1243216 A crafted HTML email using mailbox:/// links can trigger automatic, unsolicited downloads of .pdf files to the user's desktop or home directory without prompting, even if auto-saving is disabled. This behavior can be abused to fill the disk with garbage data (e.g. using /dev/urandom on Linux) or to leak Windows credentials via SMB links when the email is viewed in HTML mode. While user interaction is required to download the .pdf file, visual obfuscation can conceal the download trigger. Viewing the email in HTML mode is enough to load external content. This vulnerability affects Thunderbird < 128.10.1 and Thunderbird < 138.0.1. CVE-2025-3877 SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-128.10.1-150200.8.215.1 SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-translations-common-128.10.1-150200.8.215.1 SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-translations-other-128.10.1-150200.8.215.1 SUSE Linux Enterprise Workstation Extension 15 SP7:MozillaThunderbird-128.10.1-150200.8.215.1 SUSE Linux Enterprise Workstation Extension 15 SP7:MozillaThunderbird-translations-common-128.10.1-150200.8.215.1 SUSE Linux Enterprise Workstation Extension 15 SP7:MozillaThunderbird-translations-other-128.10.1-150200.8.215.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202501660-2/ https://www.suse.com/security/cve/CVE-2025-3877.html CVE-2025-3877 https://bugzilla.suse.com/1243216 SUSE Bug 1243216 Thunderbird's handling of the X-Mozilla-External-Attachment-URL header can be exploited to execute JavaScript in the file:/// context. By crafting a nested email attachment (message/rfc822) and setting its content type to application/pdf, Thunderbird may incorrectly render it as HTML when opened, allowing the embedded JavaScript to run without requiring a file download. This behavior relies on Thunderbird auto-saving the attachment to /tmp and linking to it via the file:/// protocol, potentially enabling JavaScript execution as part of the HTML. This vulnerability affects Thunderbird < 128.10.1 and Thunderbird < 138.0.1. CVE-2025-3909 SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-128.10.1-150200.8.215.1 SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-translations-common-128.10.1-150200.8.215.1 SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-translations-other-128.10.1-150200.8.215.1 SUSE Linux Enterprise Workstation Extension 15 SP7:MozillaThunderbird-128.10.1-150200.8.215.1 SUSE Linux Enterprise Workstation Extension 15 SP7:MozillaThunderbird-translations-common-128.10.1-150200.8.215.1 SUSE Linux Enterprise Workstation Extension 15 SP7:MozillaThunderbird-translations-other-128.10.1-150200.8.215.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202501660-2/ https://www.suse.com/security/cve/CVE-2025-3909.html CVE-2025-3909 https://bugzilla.suse.com/1243216 SUSE Bug 1243216 It was possible to craft an email that showed a tracking link as an attachment. If the user attempted to open the attachment, Thunderbird automatically accessed the link. The configuration to block remote content did not prevent that. Thunderbird has been fixed to no longer allow access to web pages listed in the X-Mozilla-External-Attachment-URL header of an email. This vulnerability affects Thunderbird < 128.10.1 and Thunderbird < 138.0.1. CVE-2025-3932 SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-128.10.1-150200.8.215.1 SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-translations-common-128.10.1-150200.8.215.1 SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-translations-other-128.10.1-150200.8.215.1 SUSE Linux Enterprise Workstation Extension 15 SP7:MozillaThunderbird-128.10.1-150200.8.215.1 SUSE Linux Enterprise Workstation Extension 15 SP7:MozillaThunderbird-translations-common-128.10.1-150200.8.215.1 SUSE Linux Enterprise Workstation Extension 15 SP7:MozillaThunderbird-translations-other-128.10.1-150200.8.215.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202501660-2/ https://www.suse.com/security/cve/CVE-2025-3932.html CVE-2025-3932 https://bugzilla.suse.com/1243216 SUSE Bug 1243216