Описание
A flaw was found in the way Samba maps domain users to local users. An authenticated attacker could use this flaw to cause possible privilege escalation.
Меры по смягчению последствий
Setting "gensec:require_pac=true" in the smb.conf makes, due to a cache prime in winbind, the DOMAIN\user lookup succeed, provided nss_winbind is in use, 'winbind use default domain = no' (the default) and no error paths are hit.
It would be prudent to pre-create disabled users in Active Directory matching on all privileged names not held in Active Directory, eg
(repeat for eg all system users under 1000 in /etc/passwd or special to any other AD-connected services, eg perhaps "admin" for a web-app)
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 9 | samba | Not affected | ||
| Red Hat Enterprise Linux 7 | samba | Fixed | RHSA-2021:5192 | 16.12.2021 |
| Red Hat Enterprise Linux 8 | samba | Fixed | RHSA-2021:5082 | 13.12.2021 |
| Red Hat Enterprise Linux 8 | samba | Fixed | RHSA-2021:5082 | 13.12.2021 |
| Red Hat Enterprise Linux 8.2 Extended Update Support | samba | Fixed | RHSA-2022:0074 | 11.01.2022 |
| Red Hat Enterprise Linux 8.4 Extended Update Support | samba | Fixed | RHSA-2022:0008 | 04.01.2022 |
| Red Hat Gluster Storage 3.5 for RHEL 7 | samba | Fixed | RHSA-2021:4844 | 29.11.2021 |
| Red Hat Gluster Storage 3.5 for RHEL 8 | samba | Fixed | RHSA-2021:4843 | 29.11.2021 |
Показывать по
Дополнительная информация
Статус:
EPSS
8.1 High
CVSS3
Связанные уязвимости
A flaw was found in the way Samba maps domain users to local users. An authenticated attacker could use this flaw to cause possible privilege escalation.
A flaw was found in the way Samba maps domain users to local users. An authenticated attacker could use this flaw to cause possible privilege escalation.
A flaw was found in the way Samba maps domain users to local users. An ...
EPSS
8.1 High
CVSS3