Описание
FreeRDP shadow server from 3.0.0 before 3.32.0 dispatches input PDUs during the Confirm Active state before authentication, allowing unauthenticated attackers to inject keyboard input. Attackers can negotiate TLS-only RDP and send an input PDU without Confirm Active to inject synthetic keystrokes into the host user's X11 session via XTEST.
A flaw was found in FreeRDP. A remote, unauthenticated attacker can exploit this issue by connecting to the shadow server and transmitting input data before authentication is completed. This allows the attacker to inject synthetic keystrokes directly into the host user's active session, potentially performing unauthorized actions on the host system.
Отчет
Red Hat has rated this vulnerability as Important because an unauthenticated remote attacker with network access to a running shadow server can bypass authentication checks and inject synthetic keystrokes directly into an active graphical session. This issue specifically affects environments using FreeRDP 3, which is included in Red Hat Enterprise Linux 10, whereas earlier enterprise versions utilizing FreeRDP 2 do not contain the vulnerable state-machine code. Overall exposure is limited on standard systems because the FreeRDP shadow daemon is not active by default and requires explicit execution by an administrator or user.
Меры по смягчению последствий
Do not expose freerdp-shadow-cli to untrusted networks. Restrict access with host firewalling and require authentication.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | freerdp | Not affected | ||
| Red Hat Enterprise Linux 7 | freerdp | Not affected | ||
| Red Hat Enterprise Linux 8 | freerdp | Not affected | ||
| Red Hat Enterprise Linux 9 | freerdp | Not affected | ||
| Red Hat Enterprise Linux 10 | freerdp | Fixed | RHSA-2026:94514 | 03.11.2026 |
Показывать по
Ссылки на источники
Дополнительная информация
Статус:
EPSS
7.5 High
CVSS3
Связанные уязвимости
FreeRDP shadow server from 3.0.0 before 3.32.0 dispatches input PDUs during the Confirm Active state before authentication, allowing unauthenticated attackers to inject keyboard input. Attackers can negotiate TLS-only RDP and send an input PDU without Confirm Active to inject synthetic keystrokes into the host user's X11 session via XTEST.
FreeRDP shadow server from 3.0.0 before 3.32.0 dispatches input PDUs during the Confirm Active state before authentication, allowing unauthenticated attackers to inject keyboard input. Attackers can negotiate TLS-only RDP and send an input PDU without Confirm Active to inject synthetic keystrokes into the host user's X11 session via XTEST.
FreeRDP shadow server from 3.0.0 before 3.32.0 dispatches input PDUs d ...
FreeRDP shadow server from 3.0.0 before 3.32.0 dispatches input PDUs during the Confirm Active state before authentication, allowing unauthenticated attackers to inject keyboard input. Attackers can negotiate TLS-only RDP and send an input PDU without Confirm Active to inject synthetic keystrokes into the host user's X11 session via XTEST.
ELSA-2026-94514: freerdp security, bug fix, and enhancement update (IMPORTANT)
EPSS
7.5 High
CVSS3