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

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CVE-2020-13392

Severity CVSS v4.0:
Pending analysis
Type:
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Publication date:
22/05/2020
Last modified:
27/05/2020

Description

An issue was discovered on Tenda AC6 V1.0 V15.03.05.19_multi_TD01, AC9 V1.0 V15.03.05.19(6318)_CN, AC9 V3.0 V15.03.06.42_multi, AC15 V1.0 V15.03.05.19_multi_TD01, and AC18 V15.03.05.19(6318_)_CN devices. There is a buffer overflow vulnerability in the router's web server -- httpd. While processing the /goform/setcfm funcpara1 parameter for a POST request, a value is directly used in a sprintf to a local variable placed on the stack, which overwrites the return address of a function. An attacker can construct a payload to carry out arbitrary code execution attacks.

Impact

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

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x
9.80
Severity 3.x
CRITICAL
Vector 2.0
AV:N/AC:L/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

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

Base Score 2.0
7.50
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:tendacn:ac6_firmware:v15.03.05.19_multi_td01:*:*:*:*:*:*:*
cpe:2.3:h:tendacn:ac6:1.0:*:*:*:*:*:*:*
cpe:2.3:o:tendacn:ac9_firmware:v15.03.05.19\(6318\):*:*:*:*:*:*:*
cpe:2.3:h:tendacn:ac9:1.0:*:*:*:*:*:*:*
cpe:2.3:o:tendacn:ac15_firmware:v15.03.05.19_multi_td01:*:*:*:*:*:*:*
cpe:2.3:h:tendacn:ac15:1.0:*:*:*:*:*:*:*
cpe:2.3:o:tendacn:ac18_firmware:v15.03.05.19\(6318\):*:*:*:*:*:*:*
cpe:2.3:h:tendacn:ac18:-:*:*:*:*:*:*:*
cpe:2.3:o:tendacn:ac9_firmware:v15.03.06.42_multi:*:*:*:*:*:*:*
cpe:2.3:h:tendacn:ac9:3.0:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools