Описание
FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 renders uninitialized heap memory from un-decoded progressive tiles because the tile->current buffer is allocated without zeroing. A malicious RDP server can send a crafted WBT_TILE_FIRST then WBT_TILE_UPGRADE sequence to paint heap bytes onscreen or abort the client process.
A flaw was found in FreeRDP. A malicious Remote Desktop Protocol (RDP) server can exploit this vulnerability by sending a crafted sequence of progressive display tile updates to a connecting client. Because decompression buffers are allocated without being initialized, processing these updates can trigger an internal assertion failure that terminates the client application or causes uninitialized heap memory to be rendered directly onto the screen. This allows an attacker to cause a Denial of Service (DoS) or disclose sensitive information.
Отчет
This vulnerability is rated as Important rather than Moderate because a compromised or malicious remote desktop endpoint can trigger an unhandled crash or leak uninitialized process memory to the client display without requiring privileges. In Red Hat Enterprise Linux, FreeRDP packages are primarily utilized to establish outbound remote desktop sessions, meaning exposure depends on connecting to an untrusted server. While the attack occurs over the network, exploitation relies on user interaction to initiate the connection to a rogue host rather than exposing a continuously listening network service.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | freerdp | Affected | ||
| Red Hat Enterprise Linux 7 | freerdp | Affected | ||
| Red Hat Enterprise Linux 10 | freerdp | Fixed | RHSA-2026:94514 | 03.11.2026 |
| Red Hat Enterprise Linux 8 | freerdp | Fixed | RHSA-2026:94510 | 03.11.2026 |
| Red Hat Enterprise Linux 9 | freerdp | Fixed | RHSA-2026:93592 | 02.11.2026 |
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Дополнительная информация
Статус:
EPSS
7.1 High
CVSS3
Связанные уязвимости
FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 renders uninitialized heap memory from un-decoded progressive tiles because the tile->current buffer is allocated without zeroing. A malicious RDP server can send a crafted WBT_TILE_FIRST then WBT_TILE_UPGRADE sequence to paint heap bytes onscreen or abort the client process.
FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 renders uninitialized heap memory from un-decoded progressive tiles because the tile->current buffer is allocated without zeroing. A malicious RDP server can send a crafted WBT_TILE_FIRST then WBT_TILE_UPGRADE sequence to paint heap bytes onscreen or abort the client process.
FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 renders uninitialized hea ...
FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 renders uninitialized heap memory from un-decoded progressive tiles because the tile->current buffer is allocated without zeroing. A malicious RDP server can send a crafted WBT_TILE_FIRST then WBT_TILE_UPGRADE sequence to paint heap bytes onscreen or abort the client process.
Уязвимость функции winpr_aligned_malloc() RDP-клиента FreeRDP, позволяющая нарушителю получить несанкционированный доступ к защищаемой информации или вызвать отказ в обслуживании
EPSS
7.1 High
CVSS3