Описание
In the Linux kernel, the following vulnerability has been resolved: virt/coco/sev-guest: Double-buffer messages The encryption algorithms read and write directly to shared unencrypted memory, which may leak information as well as permit the host to tamper with the message integrity. Instead, copy whole messages in or out as needed before doing any computation on them.
Отчет
This vulnerability is rated as Moderate by Red Hat. The vulnerability primarily impacts confidentiality and integrity, because plaintext or intermediate values can be observed via shared unencrypted memory and as such there can be host-controlled modifications of the message buffer that can influence what is encrypted or verified and decrypted. Impact on availability is limited to tampering causing request failures or EBADMSG errors. However, triggering this vulnerability most likely requires elevated privileges that correspond to hypervisor or host-level control (typically higher than what a guest local user will possess).
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Not affected | ||
| Red Hat Enterprise Linux 6 | kernel | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | ||
| Red Hat Enterprise Linux 8 | kernel-rt | Fix deferred | ||
| Red Hat Enterprise Linux 9 | kernel-rt | Fix deferred | ||
| Red Hat Enterprise Linux 8 | kernel | Fixed | RHSA-2023:7077 | 14.11.2023 |
| Red Hat Enterprise Linux 9 | kernel | Fixed | RHSA-2023:5069 | 12.09.2023 |
| Red Hat Enterprise Linux 9 | kernel | Fixed | RHSA-2023:5069 | 12.09.2023 |
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Дополнительная информация
Статус:
6 Medium
CVSS3
Связанные уязвимости
In the Linux kernel, the following vulnerability has been resolved: virt/coco/sev-guest: Double-buffer messages The encryption algorithms read and write directly to shared unencrypted memory, which may leak information as well as permit the host to tamper with the message integrity. Instead, copy whole messages in or out as needed before doing any computation on them.
In the Linux kernel, the following vulnerability has been resolved: virt/coco/sev-guest: Double-buffer messages The encryption algorithms read and write directly to shared unencrypted memory, which may leak information as well as permit the host to tamper with the message integrity. Instead, copy whole messages in or out as needed before doing any computation on them.
In the Linux kernel, the following vulnerability has been resolved: v ...
In the Linux kernel, the following vulnerability has been resolved: virt/coco/sev-guest: Double-buffer messages The encryption algorithms read and write directly to shared unencrypted memory, which may leak information as well as permit the host to tamper with the message integrity. Instead, copy whole messages in or out as needed before doing any computation on them.
6 Medium
CVSS3