Описание
A path traversal flaw was found in SSSD's AD GPO provider. The ad_gpo_extract_smb_components() function does not sanitize .. sequences in the gPCFileSysPath LDAP attribute, allowing an attacker with AD GPO management access to write files outside the GPO cache directory as root. On default RHEL configurations with SELinux enforcing, this can be used to inject Kerberos configuration leading to authentication bypass.
Отчет
Red Hat has rated this as Moderate because exploitation requires high privileges (AD GPO management access) and on default RHEL configurations with SELinux enforcing, the realistic impact is limited to Kerberos authentication bypass via krb5 configuration injection. SELinux blocks writes to most security-critical paths such as /etc/cron.d/.
Меры по смягчению последствий
Set ad_gpo_access_control = disabled in /etc/sssd/sssd.conf to disable GPO fetching entirely. Note that this removes GPO-based login policy enforcement.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | sssd | Out of support scope | ||
| Red Hat OpenShift Container Platform 4 | openshift/ose-rhel-coreos-9 | Affected | ||
| Red Hat Enterprise Linux 10 | sssd | Fixed | RHSA-2026:41937 | 20.07.2026 |
| Red Hat Enterprise Linux 10.0 Extended Update Support | sssd | Fixed | RHSA-2026:46482 | 27.07.2026 |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support | sssd | Fixed | RHSA-2026:50109 | 04.08.2026 |
| Red Hat Enterprise Linux 8 | sssd | Fixed | RHSA-2026:46990 | 28.07.2026 |
| Red Hat Enterprise Linux 8 | sssd | Fixed | RHSA-2026:46990 | 28.07.2026 |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | sssd | Fixed | RHSA-2026:49841 | 04.08.2026 |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | sssd | Fixed | RHSA-2026:49841 | 04.08.2026 |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | sssd | Fixed | RHSA-2026:49844 | 04.08.2026 |
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Дополнительная информация
Статус:
8 High
CVSS3
Связанные уязвимости
A path traversal flaw was found in SSSD's AD GPO provider. The ad_gpo_extract_smb_components() function does not sanitize .. sequences in the gPCFileSysPath LDAP attribute, allowing an attacker with AD GPO management access to write files outside the GPO cache directory as root. On default RHEL configurations with SELinux enforcing, this can be used to inject Kerberos configuration leading to authentication bypass.
A path traversal flaw was found in SSSD's AD GPO provider. The ad_gpo_extract_smb_components() function does not sanitize .. sequences in the gPCFileSysPath LDAP attribute, allowing an attacker with AD GPO management access to write files outside the GPO cache directory as root. On default RHEL configurations with SELinux enforcing, this can be used to inject Kerberos configuration leading to authentication bypass.
A path traversal flaw was found in SSSD's AD GPO provider. The ad_gpo_ ...
A path traversal flaw was found in SSSD's AD GPO provider. The ad_gpo_extract_smb_components() function does not sanitize .. sequences in the gPCFileSysPath LDAP attribute, allowing an attacker with AD GPO management access to write files outside the GPO cache directory as root. On default RHEL configurations with SELinux enforcing, this can be used to inject Kerberos configuration leading to authentication bypass.
8 High
CVSS3