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ID

VAR-202203-1139


CVE

CVE-2021-46393


TITLE

Tenda-AX3 Buffer Overflow Vulnerability

Trust: 0.6

sources: CNVD: CNVD-2022-20158

DESCRIPTION

There is a stack buffer overflow vulnerability in the formSetPPTPServer function of Tenda-AX3 router V16.03.12.10_CN. The v10 variable is directly retrieved from the http request parameter startIp. Then v10 will be splice to stack by function sscanf without any security check,which causes stack overflow. By POSTing the page /goform/SetPptpServerCfg with proper startIp, the attacker can easily perform remote code execution with carefully crafted overflow data. The Tenda-AX3 is a dual-band wireless router from the Chinese company Tenda. No detailed vulnerability details are currently provided

Trust: 1.44

sources: NVD: CVE-2021-46393 // CNVD: CNVD-2022-20158

IOT TAXONOMY

category:['Network device']sub_category: -

Trust: 0.6

sources: CNVD: CNVD-2022-20158

AFFECTED PRODUCTS

vendor:tendamodel:ax3scope:eqversion:16.03.12.10

Trust: 1.6

sources: CNVD: CNVD-2022-20158 // NVD: CVE-2021-46393

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov: CVE-2021-46393
value: CRITICAL

Trust: 1.0

CNVD: CNVD-2022-20158
value: HIGH

Trust: 0.6

CNNVD: CNNVD-202203-462
value: CRITICAL

Trust: 0.6

nvd@nist.gov: CVE-2021-46393
severity: HIGH
baseScore: 7.5
vectorString: AV:N/AC:L/AU:N/C:P/I:P/A:P
accessVector: NETWORK
accessComplexity: LOW
authentication: NONE
confidentialityImpact: PARTIAL
integrityImpact: PARTIAL
availabilityImpact: PARTIAL
exploitabilityScore: 10.0
impactScore: 6.4
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 1.0

CNVD: CNVD-2022-20158
severity: HIGH
baseScore: 7.5
vectorString: AV:N/AC:L/AU:N/C:P/I:P/A:P
accessVector: NETWORK
accessComplexity: LOW
authentication: NONE
confidentialityImpact: PARTIAL
integrityImpact: PARTIAL
availabilityImpact: PARTIAL
exploitabilityScore: 10.0
impactScore: 6.4
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 0.6

nvd@nist.gov: CVE-2021-46393
baseSeverity: CRITICAL
baseScore: 9.8
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: 3.9
impactScore: 5.9
version: 3.1

Trust: 1.0

sources: CNVD: CNVD-2022-20158 // CNNVD: CNNVD-202203-462 // NVD: CVE-2021-46393

PROBLEMTYPE DATA

problemtype:CWE-787

Trust: 1.0

sources: NVD: CVE-2021-46393

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202203-462

TYPE

buffer error

Trust: 0.6

sources: CNNVD: CNNVD-202203-462

PATCH

title:Patch for Tenda-AX3 Buffer Overflow Vulnerabilityurl:https://www.cnvd.org.cn/patchInfo/show/325886

Trust: 0.6

title:Tenda-AX3 Buffer error vulnerability fixurl:http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=184811

Trust: 0.6

sources: CNVD: CNVD-2022-20158 // CNNVD: CNNVD-202203-462

EXTERNAL IDS

db:NVDid:CVE-2021-46393

Trust: 2.2

db:CNVDid:CNVD-2022-20158

Trust: 0.6

db:CNNVDid:CNNVD-202203-462

Trust: 0.6

sources: CNVD: CNVD-2022-20158 // CNNVD: CNNVD-202203-462 // NVD: CVE-2021-46393

REFERENCES

url:https://github.com/sec-bin/iot-cve/tree/main/tenda/ax3/3

Trust: 1.6

url:https://cxsecurity.com/cveshow/cve-2021-46393/

Trust: 1.2

sources: CNVD: CNVD-2022-20158 // CNNVD: CNNVD-202203-462 // NVD: CVE-2021-46393

SOURCES

db:CNVDid:CNVD-2022-20158
db:CNNVDid:CNNVD-202203-462
db:NVDid:CVE-2021-46393

LAST UPDATE DATE

2024-11-23T21:58:29.131000+00:00


SOURCES UPDATE DATE

db:CNVDid:CNVD-2022-20158date:2022-03-17T00:00:00
db:CNNVDid:CNNVD-202203-462date:2022-03-11T00:00:00
db:NVDid:CVE-2021-46393date:2024-11-21T06:34:01.760

SOURCES RELEASE DATE

db:CNVDid:CNVD-2022-20158date:2022-03-17T00:00:00
db:CNNVDid:CNNVD-202203-462date:2022-03-04T00:00:00
db:NVDid:CVE-2021-46393date:2022-03-04T13:15:08.327