Описание
An issue was discovered in the Linux kernel through 5.2.13. nbd_genl_status in drivers/block/nbd.c does not check the nla_nest_start_noflag return value.
An improper return check flaw was found in the Linux kernel’s network block device driver functionality when the user call query to check the status of existing network block devices. This flaw allows a local user to crash the system.
Отчет
The impact of this issue is Low, because attack is specific for certain network block device usage and could be triggered only by local user with access to the device (resulting denial-of-service) and attack is complex, because could happen only if specific condition (out of memory) at the moment of the attack is met.
Меры по смягчению последствий
To mitigate this issue, prevent module nbd from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | 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-alt | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | ||
| Red Hat Enterprise Linux 8 | kernel | Fix deferred | ||
| Red Hat Enterprise Linux 8 | kernel-rt | Fix deferred | ||
| Red Hat Enterprise Linux 9 | kernel | Fix deferred | ||
| Red Hat Enterprise MRG 2 | kernel-rt | Not affected |
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Дополнительная информация
Статус:
EPSS
4.1 Medium
CVSS3
Связанные уязвимости
An issue was discovered in the Linux kernel through 5.2.13. nbd_genl_status in drivers/block/nbd.c does not check the nla_nest_start_noflag return value.
An issue was discovered in the Linux kernel through 5.2.13. nbd_genl_status in drivers/block/nbd.c does not check the nla_nest_start_noflag return value.
An issue was discovered in the Linux kernel through 5.2.13. nbd_genl_s ...
An issue was discovered in the Linux kernel through 5.2.13. nbd_genl_status in drivers/block/nbd.c does not check the nla_nest_start_noflag return value.
Уязвимость функции nbd_genl_status ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании
EPSS
4.1 Medium
CVSS3