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fstec логотип

BDU:2020-05160

Опубликовано: 04 нояб. 2020
Источник: fstec
CVSS3: 8.1
CVSS2: 7.6
EPSS Низкий

Описание

Уязвимость среды предварительной загрузки Preboot eXecution Environment (PXE) операционной системы Cisco IOS XR связана с недостатками контроля доступа. Эксплуатация уязвимости может позволить нарушителю, действующему удаленно, выполнить произвольный код

Вендор

Cisco Systems Inc.

Наименование ПО

Cisco IOS XR

Версия ПО

до 6.5.2 (Cisco IOS XR)
до 7.1.1 (Cisco IOS XR)
до 7.2.1 (Cisco IOS XR)
до 6.6.3 (Cisco IOS XR)
7.0.2 (Cisco IOS XR)
до 6.6.3 (Cisco IOS XR)

Тип ПО

Операционная система

Операционные системы и аппаратные платформы

Cisco Systems Inc. Cisco IOS XR до 6.5.2
Cisco Systems Inc. Cisco IOS XR до 7.1.1
Cisco Systems Inc. Cisco IOS XR до 7.2.1
Cisco Systems Inc. Cisco IOS XR до 6.6.3
Cisco Systems Inc. Cisco IOS XR 7.0.2
Cisco Systems Inc. Cisco IOS XR до 6.6.3

Уровень опасности уязвимости

Высокий уровень опасности (базовая оценка CVSS 2.0 составляет 7,6)
Высокий уровень опасности (базовая оценка CVSS 3.0 составляет 8,1)

Возможные меры по устранению уязвимости

Использование рекомендаций производителя:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-pxe-unsign-code-exec-qAa78fD2

Статус уязвимости

Подтверждена производителем

Наличие эксплойта

Данные уточняются

Информация об устранении

Уязвимость устранена

Ссылки на источники

Идентификаторы других систем описаний уязвимостей

EPSS

Процентиль: 89%
0.04583
Низкий

8.1 High

CVSS3

7.6 High

CVSS2

Связанные уязвимости

nvd логотип

CVE-2020-3284

CVSS3: 9.8
nvd
больше 5 лет назад

A vulnerability in the enhanced Preboot eXecution Environment (PXE) boot loader for Cisco IOS XR 64-bit Software could allow an unauthenticated, remote attacker to execute unsigned code during the PXE boot process on an affected device. The PXE boot loader is part of the BIOS and runs over the management interface of hardware platforms that are running Cisco IOS XR Software only. The vulnerability exists because internal commands that are issued when the PXE network boot process is loading a software image are not properly verified. An attacker could exploit this vulnerability by compromising the PXE boot server and replacing a valid software image with a malicious one. Alternatively, the attacker could impersonate the PXE boot server and send a PXE boot reply with a malicious file. A successful exploit could allow the attacker to execute unsigned code on the affected device. Note: To fix this vulnerability, both the Cisco IOS XR Software and the BIOS must be upgraded. The BIOS code is

github логотип

GHSA-5xjq-f58j-4hph

github
больше 3 лет назад

A vulnerability in the enhanced Preboot eXecution Environment (PXE) boot loader for Cisco IOS XR 64-bit Software could allow an unauthenticated, remote attacker to execute unsigned code during the PXE boot process on an affected device. The PXE boot loader is part of the BIOS and runs over the management interface of hardware platforms that are running Cisco IOS XR Software only. The vulnerability exists because internal commands that are issued when the PXE network boot process is loading a software image are not properly verified. An attacker could exploit this vulnerability by compromising the PXE boot server and replacing a valid software image with a malicious one. Alternatively, the attacker could impersonate the PXE boot server and send a PXE boot reply with a malicious file. A successful exploit could allow the attacker to execute unsigned code on the affected device. Note: To fix this vulnerability, both the Cisco IOS XR Software and the BIOS must be upgraded. The BIOS code...

EPSS

Процентиль: 89%
0.04583
Низкий

8.1 High

CVSS3

7.6 High

CVSS2