Описание
Improper access control in BlueZ may allow an unauthenticated user to potentially enable information disclosure via adjacent access.
An information leak flaw was found in the way Linux kernel’s Bluetooth stack implementation handled initialization of stack memory when handling certain AMP (Alternate MAC-PHY Manager Protocol) packets. This flaw allows a remote attacker in an adjacent range to leak small portions of stack memory on the system by sending specially crafted AMP packets. The highest threat from this vulnerability is to data confidentiality.
Меры по смягчению последствий
To mitigate these vulnerabilities on the operating system level, disable the Bluetooth functionality via blocklisting kernel modules in the Linux kernel. The kernel modules can be prevented from being loaded by using system-wide modprobe rules. Instructions on how to disable Bluetooth modules are available on the Customer Portal at https://access.redhat.com/solutions/2682931. Alternatively, Bluetooth can be disabled within the hardware or at BIOS level which will also provide an effective mitigation as the kernel will not be able to detect that Bluetooth hardware is present on the system.
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 MRG 2 | kernel-rt | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Fixed | RHSA-2020:4280 | 19.10.2020 |
| Red Hat Enterprise Linux 7 | kernel | Fixed | RHSA-2020:4276 | 20.10.2020 |
| Red Hat Enterprise Linux 7 | kernel-alt | Fixed | RHSA-2020:4279 | 19.10.2020 |
| Red Hat Enterprise Linux 7.2 Advanced Update Support | kernel | Fixed | RHSA-2020:4990 | 10.11.2020 |
| Red Hat Enterprise Linux 7.3 Advanced Update Support | kernel | Fixed | RHSA-2020:4991 | 10.11.2020 |
| Red Hat Enterprise Linux 7.3 Telco Extended Update Support | kernel | Fixed | RHSA-2020:4991 | 10.11.2020 |
| Red Hat Enterprise Linux 7.3 Update Services for SAP Solutions | kernel | Fixed | RHSA-2020:4991 | 10.11.2020 |
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Дополнительная информация
Статус:
5.3 Medium
CVSS3
Связанные уязвимости
Improper access control in BlueZ may allow an unauthenticated user to potentially enable information disclosure via adjacent access.
Improper access control in BlueZ may allow an unauthenticated user to potentially enable information disclosure via adjacent access.
Improper access control in BlueZ may allow an unauthenticated user to ...
Уязвимость компонента net/bluetooth/a2mp.c ядра операционных систем Linux, позволяющая нарушителю получить несанкционированный доступ к защищаемой информации
5.3 Medium
CVSS3