Details of VAR-202104-1183

ID

VAR-202104-1183

CVE

CVE-2021-27705

TITLE

Tenda G1 and G3 Classic buffer overflow vulnerability in routers

Trust: 0.8

sources: JVNDB: JVNDB-2021-005426

DESCRIPTION

Buffer Overflow in Tenda G1 and G3 routers with firmware v15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/"qosIndex "request. This occurs because the "formQOSRuleDel" function directly passes the parameter "qosIndex" to strcpy without limit. Tenda G1 and G3 are routers of China Tenda (Tenda) company

Trust: 2.25

sources: NVD: CVE-2021-27705 // JVNDB: JVNDB-2021-005426 // CNVD: CNVD-2021-36847 // VULMON: CVE-2021-27705

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2021-36847

AFFECTED PRODUCTS

vendor:	tenda	model:	g1	scope:	eq	version:	v15.11.0.17\(9502\)_cn	Trust: 1.0
vendor:	tenda	model:	g3	scope:	eq	version:	v15.11.0.17\(9502\)_cn	Trust: 1.0
vendor:	tenda	model:	g3	scope:	-	version:	-	Trust: 0.8
vendor:	tenda	model:	g1	scope:	-	version:	-	Trust: 0.8
vendor:	tenda	model:	g1 15.11.0.17 cn	scope:	-	version:	-	Trust: 0.6
vendor:	tenda	model:	g3 15.11.0.17 cn	scope:	-	version:	-	Trust: 0.6

sources: CNVD: CNVD-2021-36847 // JVNDB: JVNDB-2021-005426 // NVD: CVE-2021-27705

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2021-27705
value:	CRITICAL
Trust: 1.0
NVD:	CVE-2021-27705
value:	CRITICAL
Trust: 0.8
CNVD:	CNVD-2021-36847
value:	HIGH
Trust: 0.6
CNNVD:	CNNVD-202104-1082
value:	CRITICAL
Trust: 0.6
VULMON:	CVE-2021-27705
value:	HIGH
Trust: 0.1

nvd@nist.gov:	CVE-2021-27705
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: 1.9
CNVD:	CNVD-2021-36847
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-2021-27705
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-2021-27705
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-2021-36847 // VULMON: CVE-2021-27705 // JVNDB: JVNDB-2021-005426 // CNNVD: CNNVD-202104-1082 // NVD: CVE-2021-27705

PROBLEMTYPE DATA

problemtype:	CWE-120	Trust: 1.0
problemtype:	Classic buffer overflow (CWE-120) [NVD Evaluation ]	Trust: 0.8

sources: JVNDB: JVNDB-2021-005426 // NVD: CVE-2021-27705

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202104-1082

TYPE

other

Trust: 0.6

sources: CNNVD: CNNVD-202104-1082

PATCH

title:

Top Page

url:

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

Trust: 0.8

sources: JVNDB: JVNDB-2021-005426

EXTERNAL IDS

db:	NVD	id:	CVE-2021-27705	Trust: 3.9
db:	JVNDB	id:	JVNDB-2021-005426	Trust: 0.8
db:	CNVD	id:	CNVD-2021-36847	Trust: 0.6
db:	CNNVD	id:	CNNVD-202104-1082	Trust: 0.6
db:	VULMON	id:	CVE-2021-27705	Trust: 0.1

sources: CNVD: CNVD-2021-36847 // VULMON: CVE-2021-27705 // JVNDB: JVNDB-2021-005426 // CNNVD: CNNVD-202104-1082 // NVD: CVE-2021-27705

REFERENCES

url:	https://hackmd.io/zb7lffanr0scpatssecfbg	Trust: 3.1
url:	https://nvd.nist.gov/vuln/detail/cve-2021-27705	Trust: 2.0
url:	https://cwe.mitre.org/data/definitions/120.html	Trust: 0.1
url:	https://nvd.nist.gov	Trust: 0.1

sources: CNVD: CNVD-2021-36847 // VULMON: CVE-2021-27705 // JVNDB: JVNDB-2021-005426 // CNNVD: CNNVD-202104-1082 // NVD: CVE-2021-27705

SOURCES

db:	CNVD	id:	CNVD-2021-36847
db:	VULMON	id:	CVE-2021-27705
db:	JVNDB	id:	JVNDB-2021-005426
db:	CNNVD	id:	CNNVD-202104-1082
db:	NVD	id:	CVE-2021-27705

LAST UPDATE DATE

2024-11-23T22:47:39.377000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2021-36847	date:	2021-05-25T00:00:00
db:	VULMON	id:	CVE-2021-27705	date:	2021-04-20T00:00:00
db:	JVNDB	id:	JVNDB-2021-005426	date:	2021-12-14T07:19:00
db:	CNNVD	id:	CNNVD-202104-1082	date:	2021-04-22T00:00:00
db:	NVD	id:	CVE-2021-27705	date:	2024-11-21T05:58:27.570

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2021-36847	date:	2021-05-25T00:00:00
db:	VULMON	id:	CVE-2021-27705	date:	2021-04-14T00:00:00
db:	JVNDB	id:	JVNDB-2021-005426	date:	2021-12-14T00:00:00
db:	CNNVD	id:	CNNVD-202104-1082	date:	2021-04-14T00:00:00
db:	NVD	id:	CVE-2021-27705	date:	2021-04-14T15:15:13.970