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.
Problem types
Insufficient Verification of Data Authenticity
Product status
0:4.23.5-109.el10_2 (rpm) before *
0:4.21.3-114.el10_0.1 (rpm) before *
0:4.19.4-16.el8_10 (rpm) before *
0:4.19.4-16.el8_10 (rpm) before *
0:4.15.5-16.el8_6.1 (rpm) before *
0:4.15.5-16.el8_6.1 (rpm) before *
0:4.17.5-7.el8_8.1 (rpm) before *
0:4.17.5-7.el8_8.1 (rpm) before *
0:4.23.5-10.el9_8 (rpm) before *
0:4.23.5-10.el9_8 (rpm) before *
0:4.17.5-105.el9_2.5 (rpm) before *
0:4.19.4-105.el9_4.4 (rpm) before *
0:4.21.3-14.el9_6.1 (rpm) before *
Timeline
| 2026-03-13: | Reported to Red Hat. |
| 2026-05-27: | Made public. |
Credits
Red Hat would like to thank Arad Inbar (DREAM Security Research Team), Ben Grinberg (DREAM Security Research Team), Michalis Vasileiadis, and Nir Somech (DREAM Security Research Team) for reporting this issue.
References
access.redhat.com/errata/RHSA-2026:22644 (RHSA-2026:22644)
access.redhat.com/errata/RHSA-2026:22963 (RHSA-2026:22963)
access.redhat.com/errata/RHSA-2026:25049 (RHSA-2026:25049)
access.redhat.com/errata/RHSA-2026:25979 (RHSA-2026:25979)
access.redhat.com/errata/RHSA-2026:28053 (RHSA-2026:28053)
access.redhat.com/errata/RHSA-2026:28054 (RHSA-2026:28054)
access.redhat.com/errata/RHSA-2026:28055 (RHSA-2026:28055)
access.redhat.com/errata/RHSA-2026:28056 (RHSA-2026:28056)
access.redhat.com/errata/RHSA-2026:28057 (RHSA-2026:28057)
access.redhat.com/security/cve/CVE-2026-3012
bugzilla.redhat.com/show_bug.cgi?id=2447319 (RHBZ#2447319)
bugzilla.samba.org/show_bug.cgi?id=16003