Описание
An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This flaw allows a local attacker with a special privilege to crash the system or leak internal information.
Отчет
The default Red Hat Enterprise Linux kernel prevents unprivileged users from being able to use eBPF by the kernel.unprivileged_bpf_disabled sysctl. This would require a privileged user with CAP_SYS_ADMIN or root to be able to abuse this flaw reducing its attack space. As successful exploitation of this bug has pre-requisites that are in general considered bad practises, this bug is rated as Moderate.
Меры по смягчению последствий
For the Red Hat Enterprise Linux 7 the eBPF for unprivileged users is always disabled. For the Red Hat Enterprise Linux 8 to confirm the current state, inspect the sysctl with the command:
cat /proc/sys/kernel/unprivileged_bpf_disabled
The setting of 1 would mean that unprivileged users can not use eBPF, mitigating the flaw. A kernel update will be required to mitigate the flaw for the root or users with CAP_SYS_ADMIN capabilities.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel | Out of support scope | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Out of support scope | ||
| Red Hat Enterprise Linux 9 | kernel | Affected | ||
| Red Hat Enterprise Linux 9 | kernel-rt | Will not fix | ||
| Red Hat Enterprise Linux 8 | kernel-rt | Fixed | RHSA-2024:2950 | 22.05.2024 |
| Red Hat Enterprise Linux 8 | kernel | Fixed | RHSA-2024:3138 | 22.05.2024 |
| Red Hat Enterprise Linux 8.6 Extended Update Support | kernel | Fixed | RHSA-2024:0724 | 07.02.2024 |
| Red Hat Enterprise Linux 8.8 Extended Update Support | kernel | Fixed | RHSA-2024:10262 | 26.11.2024 |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | kernel | Fixed | RHSA-2024:0724 | 07.02.2024 |
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Дополнительная информация
Статус:
EPSS
7 High
CVSS3
Связанные уязвимости
An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This flaw allows a local attacker with a special privilege to crash the system or leak internal information.
An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This flaw allows a local attacker with a special privilege to crash the system or leak internal information.
An out-of-bounds (OOB) memory access flaw was found in the Linux kerne ...
An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This flaw allows a local attacker with a special privilege to crash the system or leak internal information.
Уязвимость подсистемы eBPF ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании, аварийное завершение работы приложения или выполнить произвольный код
EPSS
7 High
CVSS3