Описание
A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.
Отчет
The versions of qemu-kvm as shipped with Red Hat Enterprise Linux 6 and 7 are not affected by this flaw as they did not include the QIOChannel framework (introduced upstream in QEMU 2.10).
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | qemu-kvm | Not affected | ||
| Red Hat Enterprise Linux 7 | qemu-kvm | Not affected | ||
| Red Hat Enterprise Linux 7 | qemu-kvm-ma | Affected | ||
| Red Hat Enterprise Linux 8 Advanced Virtualization | virt:av/qemu-kvm | Affected | ||
| Red Hat OpenStack Platform 13 (Queens) | qemu-kvm-rhev | Affected | ||
| Red Hat Enterprise Linux 8 | virt-devel | Fixed | RHSA-2023:5264 | 19.09.2023 |
| Red Hat Enterprise Linux 8 | virt | Fixed | RHSA-2023:5264 | 19.09.2023 |
| Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions | virt | Fixed | RHSA-2023:5239 | 19.09.2023 |
| Red Hat Enterprise Linux 8.2 Advanced Update Support | virt | Fixed | RHSA-2023:5587 | 10.10.2023 |
| Red Hat Enterprise Linux 8.2 Telecommunications Update Service | virt | Fixed | RHSA-2023:5587 | 10.10.2023 |
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Дополнительная информация
Статус:
EPSS
7.5 High
CVSS3
Связанные уязвимости
A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.
A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.
A flaw was found in the QEMU built-in VNC server. When a client connec ...
EPSS
7.5 High
CVSS3