Description
A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.
CVSS breakdown
CVSS 3.1
Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected products
- RedHat / enterprise_linux7.0 – 7.0
- RedHat / enterprise_linux9.0 – 9.0
- RedHat / openshift_container_platform4.0 – 4.0
- Samba / Samba4.16.0 – 4.21.0
References
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:22644
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:22963
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:25049
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:25979
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:28053
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:28054
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:28055
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:28056
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:28057
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:29863
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:57483
- VENDOR_ADVISORYhttps://access.redhat.com/security/cve/CVE-2026-3012
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=2447319
- MISChttps://bugzilla.samba.org/show_bug.cgi?id=16003
Updated 4m ago · 8 sources