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ID

VAR-202203-0478


CVE

CVE-2021-46394


TITLE

Tenda-AX3 Buffer Overflow Vulnerability (CNVD-2022-20157)

Trust: 0.6

sources: CNVD: CNVD-2022-20157

DESCRIPTION

There is a stack buffer overflow vulnerability in the formSetPPTPServer function of Tenda-AX3 router V16.03.12.10_CN. The v13 variable is directly retrieved from the http request parameter startIp. Then v13 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 available

Trust: 1.44

sources: NVD: CVE-2021-46394 // CNVD: CNVD-2022-20157

IOT TAXONOMY

category:['Network device']sub_category: -

Trust: 0.6

sources: CNVD: CNVD-2022-20157

AFFECTED PRODUCTS

vendor:tendamodel:ax3scope:eqversion:16.03.12.10

Trust: 1.6

sources: CNVD: CNVD-2022-20157 // NVD: CVE-2021-46394

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov: CVE-2021-46394
value: CRITICAL

Trust: 1.0

CNVD: CNVD-2022-20157
value: HIGH

Trust: 0.6

CNNVD: CNNVD-202203-461
value: CRITICAL

Trust: 0.6

nvd@nist.gov: CVE-2021-46394
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-2022-20157
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-2021-46394
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-2022-20157 // CNNVD: CNNVD-202203-461 // NVD: CVE-2021-46394

PROBLEMTYPE DATA

problemtype:CWE-787

Trust: 1.0

sources: NVD: CVE-2021-46394

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202203-461

TYPE

buffer error

Trust: 0.6

sources: CNNVD: CNNVD-202203-461

PATCH

title:Patch for Tenda-AX3 Buffer Overflow Vulnerability (CNVD-2022-20157)url:https://www.cnvd.org.cn/patchInfo/show/325891

Trust: 0.6

title:Tenda-AX3 Buffer error vulnerability fixurl:http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=184810

Trust: 0.6

sources: CNVD: CNVD-2022-20157 // CNNVD: CNNVD-202203-461

EXTERNAL IDS

db:NVDid:CVE-2021-46394

Trust: 2.2

db:CNVDid:CNVD-2022-20157

Trust: 0.6

db:CNNVDid:CNNVD-202203-461

Trust: 0.6

sources: CNVD: CNVD-2022-20157 // CNNVD: CNNVD-202203-461 // NVD: CVE-2021-46394

REFERENCES

url:https://github.com/sec-bin/iot-cve/tree/main/tenda/ax3/4

Trust: 1.6

url:https://cxsecurity.com/cveshow/cve-2021-46394/

Trust: 1.2

sources: CNVD: CNVD-2022-20157 // CNNVD: CNNVD-202203-461 // NVD: CVE-2021-46394

SOURCES

db:CNVDid:CNVD-2022-20157
db:CNNVDid:CNNVD-202203-461
db:NVDid:CVE-2021-46394

LAST UPDATE DATE

2024-11-23T21:50:40.330000+00:00


SOURCES UPDATE DATE

db:CNVDid:CNVD-2022-20157date:2022-03-17T00:00:00
db:CNNVDid:CNNVD-202203-461date:2022-03-11T00:00:00
db:NVDid:CVE-2021-46394date:2024-11-21T06:34:01.937

SOURCES RELEASE DATE

db:CNVDid:CNVD-2022-20157date:2022-03-11T00:00:00
db:CNNVDid:CNNVD-202203-461date:2022-03-04T00:00:00
db:NVDid:CVE-2021-46394date:2022-03-04T14:15:07.853