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Tenda AC Router Stack Buffer Overflow (CVE-2021-31755)

critical Nessus Plugin ID 186359

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Synopsis

The remote router is affected by a stack buffer overflow vulnerability.

Description

The firmware version of the Tenda AC Router is an AC11 device with firmware 02.03.01.104_CN or below. It is, therefore, affected by a stack buffer overflow vulnerability. An unauthenticated, remote attacker can exploit this, via a crafted POST request, to execute arbitrary code on the system.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update to a newer version of device firmware.

See Also

https://nvd.nist.gov/vuln/detail/CVE-2021-31755

Plugin Details

Severity: Critical

ID: 186359

File Name: tenda_ac_router_cve-2021-31755.nasl

Version: 1.2

Type: remote

Family: CGI abuses

Published: 11/28/2023

Updated: 11/29/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2021-31755

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/h:tenda:ac11

Required KB Items: installed_sw/Tenda AC Router

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/7/2021

Vulnerability Publication Date: 5/7/2021

CISA Known Exploited Vulnerability Due Dates: 11/17/2021

Reference Information

CVE: CVE-2021-31755