Описание
An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC). An attacker who successfully exploited the vulnerability could run a specially crafted application on a device on the network.
To exploit the vulnerability, an unauthenticated attacker would be required to use MS-NRPC to connect to a domain controller to obtain domain administrator access.
Microsoft is addressing the vulnerability in a phased two-part rollout. These updates address the vulnerability by modifying how Netlogon handles the usage of Netlogon secure channels.
For guidelines on how to manage the changes required for this vulnerability and more information on the phased rollout, see How to manage the changes in Netlogon secure channel connections associated with CVE-2020-1472 (updated September 28, 2020).
When the second phase of Windows updates become available in Q1 2021, customers will be notified via a revision to this security vulnerability. If you wish to be notified when these updates are released, we recommend that you register for the security notifications mailer to be alerted of content changes to this advisory. See Microsoft Technical Security Notifications.
A flaw was found in the Microsoft Windows Netlogon Remote Protocol (MS-NRPC), where it reuses a known, static, zero-value initialization vector (IV) in AES-CFB8 mode. This flaw allows an unauthenticated attacker to impersonate a domain-joined computer, including a domain controller, and possibly obtain domain administrator
privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Отчет
As per upstream samba domain controllers (AD and NT4-like) can be impacted by the ZeroLogon CVE-2020-1472. Samba packages shipped with Red Hat Gluster Storage 3, Red Hat Enterprise Linux 7 and 8 are not vulnerable by default, since they have "server schannel" enabled by default in its configuration file.
Меры по смягчению последствий
This flaw can be mitigated by using "server schannel = yes" in the smb.conf configuration file.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | samba | Will not fix | ||
| Red Hat Enterprise Linux 6 | samba | Affected | ||
| Red Hat Enterprise Linux 6 | samba4 | Affected | ||
| Red Hat Enterprise Linux 7 | samba | Fixed | RHSA-2020:5439 | 15.12.2020 |
| Red Hat Enterprise Linux 8 | openchange | Fixed | RHSA-2021:1647 | 18.05.2021 |
| Red Hat Enterprise Linux 8 | samba | Fixed | RHSA-2021:1647 | 18.05.2021 |
| Red Hat Enterprise Linux 8 | openchange | Fixed | RHSA-2021:1647 | 18.05.2021 |
| Red Hat Enterprise Linux 8 | samba | Fixed | RHSA-2021:1647 | 18.05.2021 |
| Red Hat Gluster Storage 3.5 for RHEL 7 | samba | Fixed | RHSA-2021:3723 | 05.10.2021 |
| Red Hat Gluster Storage 3.5 for RHEL 8 | samba | Fixed | RHBA-2021:1503 | 05.05.2021 |
Показывать по
Ссылки на источники
Дополнительная информация
Статус:
9.8 Critical
CVSS3
Связанные уязвимости
An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC). An attacker who successfully exploited the vulnerability could run a specially crafted application on a device on the network. To exploit the vulnerability, an unauthenticated attacker would be required to use MS-NRPC to connect to a domain controller to obtain domain administrator access. Microsoft is addressing the vulnerability in a phased two-part rollout. These updates address the vulnerability by modifying how Netlogon handles the usage of Netlogon secure channels. For guidelines on how to manage the changes required for this vulnerability and more information on the phased rollout, see How to manage the changes in Netlogon secure channel connections associated with CVE-2020-1472 (updated September 28, 2020). When the second phase of Windows updates become available in Q1 2021, customer...
An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC). An attacker who successfully exploited the vulnerability could run a specially crafted application on a device on the network. To exploit the vulnerability, an unauthenticated attacker would be required to use MS-NRPC to connect to a domain controller to obtain domain administrator access. Microsoft is addressing the vulnerability in a phased two-part rollout. These updates address the vulnerability by modifying how Netlogon handles the usage of Netlogon secure channels. For guidelines on how to manage the changes required for this vulnerability and more information on the phased rollout, see How to manage the changes in Netlogon secure channel connections associated with CVE-2020-1472 (updated September 28, 2020). When the second phase of Windows updates become available in Q1 2021, customers
An elevation of privilege vulnerability exists when an attacker establ ...
9.8 Critical
CVSS3