Details of VAR-202105-1126

ID

VAR-202105-1126

CVE

CVE-2021-31755

TITLE

Tenda AC11 Out-of-bounds write vulnerability in device

Trust: 0.8

sources: JVNDB: JVNDB-2021-006370

DESCRIPTION

An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setmac allows attackers to execute arbitrary code on the system via a crafted post request. Tenda AC11 The device contains an out-of-bounds write vulnerability.Information is obtained, information is tampered with, and service is disrupted (DoS) It may be put into a state. Tenda AC11 is an AC1200 dual-band Gigabit WiFi router

Trust: 2.25

sources: NVD: CVE-2021-31755 // JVNDB: JVNDB-2021-006370 // CNVD: CNVD-2021-33998 // VULMON: CVE-2021-31755

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2021-33998

AFFECTED PRODUCTS

vendor:	tenda	model:	ac11	scope:	lte	version:	02.03.01.104_cn	Trust: 1.0
vendor:	tenda	model:	ac11	scope:	lte	version:	ac11 firmware 02.03.01.104_cn until	Trust: 0.8
vendor:	tenda	model:	ac11	scope:	eq	version:	-	Trust: 0.8
vendor:	tenda	model:	ac11 <=02.03.01.104 cn	scope:	-	version:	-	Trust: 0.6

sources: CNVD: CNVD-2021-33998 // JVNDB: JVNDB-2021-006370 // NVD: CVE-2021-31755

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2021-31755
value:	CRITICAL
Trust: 1.0
NVD:	CVE-2021-31755
value:	CRITICAL
Trust: 0.8
CNVD:	CNVD-2021-33998
value:	HIGH
Trust: 0.6
CNNVD:	CNNVD-202105-380
value:	MEDIUM
Trust: 0.6
VULMON:	CVE-2021-31755
value:	HIGH
Trust: 0.1

nvd@nist.gov:	CVE-2021-31755
severity:	HIGH
baseScore:	10.0
vectorString:	AV:N/AC:L/AU:N/C:C/I:C/A:C
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	COMPLETE
integrityImpact:	COMPLETE
availabilityImpact:	COMPLETE
exploitabilityScore:	10.0
impactScore:	10.0
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.9
CNVD:	CNVD-2021-33998
severity:	HIGH
baseScore:	10.0
vectorString:	AV:N/AC:L/AU:N/C:C/I:C/A:C
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	COMPLETE
integrityImpact:	COMPLETE
availabilityImpact:	COMPLETE
exploitabilityScore:	10.0
impactScore:	10.0
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.6

nvd@nist.gov:	CVE-2021-31755
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
NVD:	CVE-2021-31755
baseSeverity:	CRITICAL
baseScore:	9.8
vectorString:	CVSS:3.0/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:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: CNVD: CNVD-2021-33998 // VULMON: CVE-2021-31755 // JVNDB: JVNDB-2021-006370 // CNNVD: CNNVD-202105-380 // NVD: CVE-2021-31755

PROBLEMTYPE DATA

problemtype:	CWE-787	Trust: 1.0
problemtype:	Out-of-bounds writing (CWE-787) [NVD Evaluation ]	Trust: 0.8

sources: JVNDB: JVNDB-2021-006370 // NVD: CVE-2021-31755

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202105-380

TYPE

buffer error

Trust: 0.6

sources: CNNVD: CNNVD-202105-380

PATCH

title:

Top Page

url:

https://www.tendacn.com/en/default.html

Trust: 0.8

sources: JVNDB: JVNDB-2021-006370

EXTERNAL IDS

db:	NVD	id:	CVE-2021-31755	Trust: 3.9
db:	JVNDB	id:	JVNDB-2021-006370	Trust: 0.8
db:	CNVD	id:	CNVD-2021-33998	Trust: 0.6
db:	CNNVD	id:	CNNVD-202105-380	Trust: 0.6
db:	VULMON	id:	CVE-2021-31755	Trust: 0.1

sources: CNVD: CNVD-2021-33998 // VULMON: CVE-2021-31755 // JVNDB: JVNDB-2021-006370 // CNNVD: CNNVD-202105-380 // NVD: CVE-2021-31755

REFERENCES

url:	https://github.com/yu3h0/iot_cve/tree/main/tenda/cve_3	Trust: 3.1
url:	https://nvd.nist.gov/vuln/detail/cve-2021-31755	Trust: 0.8
url:	https://cwe.mitre.org/data/definitions/787.html	Trust: 0.1
url:	https://nvd.nist.gov	Trust: 0.1

sources: CNVD: CNVD-2021-33998 // VULMON: CVE-2021-31755 // JVNDB: JVNDB-2021-006370 // CNNVD: CNNVD-202105-380 // NVD: CVE-2021-31755

SOURCES

db:	CNVD	id:	CNVD-2021-33998
db:	VULMON	id:	CVE-2021-31755
db:	JVNDB	id:	JVNDB-2021-006370
db:	CNNVD	id:	CNNVD-202105-380
db:	NVD	id:	CVE-2021-31755

LAST UPDATE DATE

2024-08-14T15:38:02.649000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2021-33998	date:	2021-05-11T00:00:00
db:	VULMON	id:	CVE-2021-31755	date:	2021-05-10T00:00:00
db:	JVNDB	id:	JVNDB-2021-006370	date:	2022-01-06T00:57:00
db:	CNNVD	id:	CNNVD-202105-380	date:	2021-05-11T00:00:00
db:	NVD	id:	CVE-2021-31755	date:	2021-05-10T14:57:33.257

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2021-33998	date:	2021-05-11T00:00:00
db:	VULMON	id:	CVE-2021-31755	date:	2021-05-07T00:00:00
db:	JVNDB	id:	JVNDB-2021-006370	date:	2022-01-06T00:00:00
db:	CNNVD	id:	CNNVD-202105-380	date:	2021-05-07T00:00:00
db:	NVD	id:	CVE-2021-31755	date:	2021-05-07T23:15:07.047