Описание
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.
Отчет
Red Hat Product Security has rated this vulnerability as Important severity.
However, exploitation requires several specific non-default conditions to be met. The vulnerable code path is only reachable when Samba Group Policy processing is explicitly enabled using the apply group policies = yes configuration option and certificate auto-enrollment is configured through Group Policy.
Hence, although the vulnerable code is present, it is not exploitable in default RHEL configurations.
In addition, the attacker must have the ability to intercept or redirect adjacent-network HTTP traffic during certificate retrieval. Because exploitation depends on explicit administrative configuration changes and adjacent-network positioning, Red Hat assesses the attack complexity as High (AC:H).
Меры по смягчению последствий
Systems are not affected unless Samba Group Policy processing and certificate auto-enrollment are explicitly enabled.
Administrators can reduce exposure by:
Avoiding unnecessary use of certificate auto-enrollment.
Ensuring your "smb.conf" does not contain a line like apply group policies = yes. If , group policy is not be enabled, the vulnerable code will not run.
Intercepting the HTTP request requires some control over the local network or other devices to intercept or redirect traffic. Some network administrators might assess this as a low risk on their
networks.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | samba | Out of support scope | ||
| Red Hat Enterprise Linux 6 | samba4 | Out of support scope | ||
| Red Hat Enterprise Linux 7 | samba | Will not fix | ||
| Red Hat Enterprise Linux 10 | samba | Fixed | RHSA-2026:22963 | 03.06.2026 |
| Red Hat Enterprise Linux 10.0 Extended Update Support | samba | Fixed | RHSA-2026:28055 | 23.06.2026 |
| Red Hat Enterprise Linux 8 | samba | Fixed | RHSA-2026:22644 | 03.06.2026 |
| Red Hat Enterprise Linux 8 | samba | Fixed | RHSA-2026:22644 | 03.06.2026 |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | samba | Fixed | RHSA-2026:28057 | 23.06.2026 |
| Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | samba | Fixed | RHSA-2026:28057 | 23.06.2026 |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service | samba | Fixed | RHSA-2026:28056 | 23.06.2026 |
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Дополнительная информация
Статус:
8 High
CVSS3
Связанные уязвимости
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.
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.
A flaw was found in Samba\u2019s certificate auto-enrollment Group Pol ...
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.
Уязвимость компонента управления групповыми политиками (GPO) программного обеспечения Samba, позволяющая нарушителю обойти существующие ограничения безопасности
8 High
CVSS3