thunderbird-128.10.1-1.el9_6.ML.1

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

thunderbird: JavaScript Execution via Spoofed PDF Attachment and file:///
Link (CVE-2025-3909)
thunderbird: Sender Spoofing via Malformed From Header in Thunderbird
(CVE-2025-3875)
thunderbird: Unsolicited File Download, Disk Space Exhaustion, and
Credential Leakage via mailbox:/// Links (CVE-2025-3877)
thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking
(CVE-2025-3932)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE page(s)
listed in the References section.

CVE(s):
CVE-2025-3875
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-2025-3877
** REJECT ** This CVE was marked as fixed, but due to other code landing - was not actually fixed. It was subsequently fixed in CVE-2025-5986.
CVE-2025-3909
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-2025-3932
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.