Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2020-6881

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
21/12/2020
Last modified:
22/12/2020

Description

ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the failure of the device to verify the validity of abnormal messages. A remote attacker could connect to the MQTT server and send an MQTT exception message to the specified device, which will cause the device to deny service. This affects:

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:zte:zxhn_e8810_firmware:1.0.26:*:*:*:*:*:*:*
cpe:2.3:o:zte:zxhn_e8810_firmware:2.0.1:*:*:*:*:*:*:*
cpe:2.3:h:zte:zxhn_e8810:-:*:*:*:*:*:*:*
cpe:2.3:o:zte:zxhn_e8820_firmware:1.1.3:*:*:*:*:*:*:*
cpe:2.3:o:zte:zxhn_e8820_firmware:2.0.13:*:*:*:*:*:*:*
cpe:2.3:h:zte:zxhn_e8820:-:*:*:*:*:*:*:*
cpe:2.3:o:zte:zxhn_e8822_firmware:2.0.13:*:*:*:*:*:*:*
cpe:2.3:h:zte:zxhn_e8822:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools