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CVE Vulnerabilities

CVE-2025-0239

Improper Certificate Validation

Published: Jan 07, 2025 | Modified: Nov 03, 2025
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
5.4 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2025-0239
CWEhttps://cwe.mitre.org/data/definitions/295.html

When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.

Weakness

The product does not validate, or incorrectly validates, a certificate.

Affected Software

NameVendorStart VersionEnd Version
FirefoxMozilla*128.6.0 (excluding)
FirefoxMozilla*134.0 (excluding)
ThunderbirdMozilla*128.6.0 (excluding)
ThunderbirdMozilla129.0 (including)134.0 (excluding)
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRedHatfirefox-0:128.6.0-1.el7_9*
Red Hat Enterprise Linux 8RedHatfirefox-0:128.6.0-1.el8_10*
Red Hat Enterprise Linux 8RedHatthunderbird-0:128.6.0-3.el8_10*
Red Hat Enterprise Linux 8.2 Advanced Update SupportRedHatfirefox-0:128.6.0-1.el8_2*
Red Hat Enterprise Linux 8.2 Advanced Update SupportRedHatthunderbird-0:128.6.0-3.el8_2*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHatfirefox-0:128.6.0-1.el8_4*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHatthunderbird-0:128.6.0-3.el8_4*
Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceRedHatfirefox-0:128.6.0-1.el8_4*
Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceRedHatthunderbird-0:128.6.0-3.el8_4*
Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsRedHatfirefox-0:128.6.0-1.el8_4*
Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsRedHatthunderbird-0:128.6.0-3.el8_4*
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRedHatfirefox-0:128.6.0-1.el8_6*
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRedHatthunderbird-0:128.6.0-3.el8_6*
Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceRedHatfirefox-0:128.6.0-1.el8_6*
Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceRedHatthunderbird-0:128.6.0-3.el8_6*
Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRedHatfirefox-0:128.6.0-1.el8_6*
Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRedHatthunderbird-0:128.6.0-3.el8_6*
Red Hat Enterprise Linux 8.8 Extended Update SupportRedHatfirefox-0:128.6.0-1.el8_8*
Red Hat Enterprise Linux 8.8 Extended Update SupportRedHatthunderbird-0:128.6.0-3.el8_8*
Red Hat Enterprise Linux 9RedHatfirefox-0:128.6.0-1.el9_5*
Red Hat Enterprise Linux 9RedHatthunderbird-0:128.6.0-3.el9_5*
Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRedHatfirefox-0:128.6.0-1.el9_0*
Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRedHatthunderbird-0:128.6.0-3.el9_0*
Red Hat Enterprise Linux 9.2 Extended Update SupportRedHatfirefox-0:128.6.0-1.el9_2*
Red Hat Enterprise Linux 9.2 Extended Update SupportRedHatthunderbird-0:128.6.0-3.el9_2*
Red Hat Enterprise Linux 9.4 Extended Update SupportRedHatfirefox-0:128.6.0-1.el9_4*
Red Hat Enterprise Linux 9.4 Extended Update SupportRedHatthunderbird-0:128.6.0-3.el9_4*
FirefoxUbuntufocal*
Mozjs102Ubuntuesm-apps/noble*
Mozjs102Ubuntujammy*
Mozjs102Ubuntunoble*
Mozjs115Ubuntunoble*
Mozjs115Ubuntuoracular*
Mozjs115Ubuntuplucky*
Mozjs52Ubuntuesm-infra/bionic*
Mozjs52Ubuntufocal*
Mozjs68Ubuntuesm-infra/focal*
Mozjs68Ubuntufocal*
Mozjs78Ubuntujammy*
Mozjs91Ubuntujammy*

Potential Mitigations

References

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