PT-2025-3805 · Mozilla+9 · Thunderbird+10
Paul Gerste
·
Published
2025-01-07
·
Updated
2026-02-02
·
CVE-2025-0239
CVSS v2.0
6.4
Medium
| Vector | AV:N/AC:L/Au:N/C:P/I:P/A:N |
Name of the Vulnerable Software and Affected Versions
Firefox versions prior to 134
Firefox ESR versions prior to 128.6
Thunderbird versions prior to 134
Thunderbird versions prior to 128.6
Description
The issue arises when using Alt-Svc, as ALPN fails to properly validate certificates in scenarios where the original server redirects to an insecure site.
Recommendations
For Firefox versions prior to 134, update to version 134 or later.
For Firefox ESR versions prior to 128.6, update to version 128.6 or later.
For Thunderbird versions prior to 134, update to version 134 or later.
For Thunderbird versions prior to 128.6, update to version 128.6 or later.
Fix
Open Redirect
Improper Certificate Validation
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Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Firefox
Linuxmint
Red Hat
Rocky Linux
Suse
Thunderbird
Ubuntu