Details of VAR-202110-0396

ID

VAR-202110-0396

CVE

CVE-2021-21748

TITLE

ZTE MF971R Out-of-bounds write vulnerability in

Trust: 0.8

sources: JVNDB: JVNDB-2021-013975

DESCRIPTION

ZTE MF971R product has two stack-based buffer overflow vulnerabilities. An attacker could exploit the vulnerabilities to execute arbitrary code. ZTE MF971R Exists in an out-of-bounds write vulnerability.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be in a state. ZTE MF971R is a Cat 6 LTE mobile Wi-Fi router with download speeds up to 300mbps and upload speeds up to 50mbps

Trust: 2.25

sources: NVD: CVE-2021-21748 // JVNDB: JVNDB-2021-013975 // CNVD: CNVD-2021-92824 // VULMON: CVE-2021-21748

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2021-92824

AFFECTED PRODUCTS

vendor:	zte	model:	mf971r	scope:	eq	version:	sv1.0.0b05	Trust: 1.0
vendor:	zte	model:	mf971r	scope:	eq	version:	1v1.0.0b06	Trust: 1.0
vendor:	zte	model:	mf971r	scope:	eq	version:	2v1.0.0b03	Trust: 1.0
vendor:	zte	model:	mf971r	scope:	eq	version:	v1.0.0b05	Trust: 1.0
vendor:	zte	model:	mf971r	scope:	eq	version:	s2v1.0.0b03	Trust: 1.0
vendor:	zte	model:	mf971r	scope:	eq	version:	-	Trust: 0.8
vendor:	zte	model:	mf971r	scope:	-	version:	-	Trust: 0.8
vendor:	zte	model:	mf971r	scope:	eq	version:	mf971r firmware	Trust: 0.8
vendor:	zte	model:	mf971r bd zte mf971rv1.0.0b05	scope:	-	version:	-	Trust: 0.6
vendor:	zte	model:	mf971r bd plkplmf971r1v1.0.0b06	scope:	-	version:	-	Trust: 0.6
vendor:	zte	model:	mf971r bd mf971r2v1.0.0b03	scope:	-	version:	-	Trust: 0.6
vendor:	zte	model:	mf971r bd zte mf971rs2v1.0.0b03	scope:	-	version:	-	Trust: 0.6
vendor:	zte	model:	mf971r bd zte mf971rsv1.0.0b05	scope:	-	version:	-	Trust: 0.6

sources: CNVD: CNVD-2021-92824 // JVNDB: JVNDB-2021-013975 // NVD: CVE-2021-21748

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2021-21748
value:	CRITICAL
Trust: 1.0
NVD:	CVE-2021-21748
value:	CRITICAL
Trust: 0.8
CNVD:	CNVD-2021-92824
value:	HIGH
Trust: 0.6
CNNVD:	CNNVD-202110-1258
value:	CRITICAL
Trust: 0.6
VULMON:	CVE-2021-21748
value:	HIGH
Trust: 0.1

nvd@nist.gov:	CVE-2021-21748
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-2021-92824
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-2021-21748
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-2021-21748
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-2021-92824 // VULMON: CVE-2021-21748 // JVNDB: JVNDB-2021-013975 // CNNVD: CNNVD-202110-1258 // NVD: CVE-2021-21748

PROBLEMTYPE DATA

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

sources: JVNDB: JVNDB-2021-013975 // NVD: CVE-2021-21748

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202110-1258

TYPE

buffer error

Trust: 0.6

sources: CNNVD: CNNVD-202110-1258

PATCH

title:	Multiple Vulnerabilities in a ZTE Mobile Internet Product	url:	https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1019764	Trust: 0.8
title:	Patch for ZTE MF971R stack buffer overflow vulnerability (CNVD-2021-92824)	url:	https://www.cnvd.org.cn/patchInfo/show/301791	Trust: 0.6
title:	ZTE MF971R LTE router Buffer error vulnerability fix	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=167218	Trust: 0.6

sources: CNVD: CNVD-2021-92824 // JVNDB: JVNDB-2021-013975 // CNNVD: CNNVD-202110-1258

EXTERNAL IDS

db:	NVD	id:	CVE-2021-21748	Trust: 3.9
db:	ZTE	id:	1019764	Trust: 1.7
db:	JVNDB	id:	JVNDB-2021-013975	Trust: 0.8
db:	CNVD	id:	CNVD-2021-92824	Trust: 0.6
db:	CS-HELP	id:	SB2021101910	Trust: 0.6
db:	TALOS	id:	TALOS-2021-1320	Trust: 0.6
db:	CNNVD	id:	CNNVD-202110-1258	Trust: 0.6
db:	VULMON	id:	CVE-2021-21748	Trust: 0.1

sources: CNVD: CNVD-2021-92824 // VULMON: CVE-2021-21748 // JVNDB: JVNDB-2021-013975 // CNNVD: CNNVD-202110-1258 // NVD: CVE-2021-21748

REFERENCES

url:	https://nvd.nist.gov/vuln/detail/cve-2021-21748	Trust: 2.0
url:	https://support.zte.com.cn/support/news/loopholeinfodetail.aspx?newsid=1019764	Trust: 1.7
url:	https://www.cybersecurity-help.cz/vdb/sb2021101910	Trust: 0.6
url:	https://talosintelligence.com/vulnerability_reports/talos-2021-1320	Trust: 0.6
url:	https://cwe.mitre.org/data/definitions/787.html	Trust: 0.1
url:	https://nvd.nist.gov	Trust: 0.1

sources: CNVD: CNVD-2021-92824 // VULMON: CVE-2021-21748 // JVNDB: JVNDB-2021-013975 // CNNVD: CNNVD-202110-1258 // NVD: CVE-2021-21748

CREDITS

Discovered by Marcin ’Icewall’ Noga of Cisco Talos.

Trust: 0.6

sources: CNNVD: CNNVD-202110-1258

SOURCES

db:	CNVD	id:	CNVD-2021-92824
db:	VULMON	id:	CVE-2021-21748
db:	JVNDB	id:	JVNDB-2021-013975
db:	CNNVD	id:	CNNVD-202110-1258
db:	NVD	id:	CVE-2021-21748

LAST UPDATE DATE

2024-08-14T13:43:19.122000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2021-92824	date:	2021-12-01T00:00:00
db:	VULMON	id:	CVE-2021-21748	date:	2021-10-25T00:00:00
db:	JVNDB	id:	JVNDB-2021-013975	date:	2022-09-30T05:49:00
db:	CNNVD	id:	CNNVD-202110-1258	date:	2021-10-27T00:00:00
db:	NVD	id:	CVE-2021-21748	date:	2021-10-25T16:24:58.600

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2021-92824	date:	2021-12-01T00:00:00
db:	VULMON	id:	CVE-2021-21748	date:	2021-10-20T00:00:00
db:	JVNDB	id:	JVNDB-2021-013975	date:	2022-09-30T00:00:00
db:	CNNVD	id:	CNNVD-202110-1258	date:	2021-10-18T00:00:00
db:	NVD	id:	CVE-2021-21748	date:	2021-10-20T16:15:08.250