Details of VAR-202004-1714

ID

VAR-202004-1714

CVE

CVE-2018-21203

TITLE

plural NETGEAR Out-of-bounds write vulnerabilities in devices

Trust: 0.8

sources: JVNDB: JVNDB-2018-016352

DESCRIPTION

Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. This affects R6100 before 1.0.1.20, R9000 before 1.0.2.52, WNDR3700v4 before 1.0.2.96, WNDR4300 before 1.0.2.98, WNDR4300v2 before 1.0.0.50, and WNDR4500v3 before 1.0.0.50. plural NETGEAR The device is vulnerable to out-of-bounds writes.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be put into a state. NETGEAR R9000, etc. are all wireless routers from NETGEAR. The vulnerability stems from the fact that when the network system or product performs operations on the memory, the data boundary is not correctly verified, resulting in incorrect read and write operations to other associated memory locations. Attackers can use this vulnerability to cause buffer overflow or heap overflow. This affects R6100 prior to 1.0.1.20, R9000 prior to 1.0.2.52, WNDR3700v4 prior to 1.0.2.96, WNDR4300 prior to 1.0.2.98, WNDR4300v2 prior to 1.0.0.50, and WNDR4500v3 prior to 1.0.0.50

Trust: 2.25

sources: NVD: CVE-2018-21203 // JVNDB: JVNDB-2018-016352 // CNVD: CNVD-2021-46355 // VULMON: CVE-2018-21203

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2021-46355

AFFECTED PRODUCTS

vendor:	netgear	model:	r9000	scope:	lt	version:	1.0.2.52	Trust: 1.6
vendor:	netgear	model:	r6100	scope:	lt	version:	1.0.1.20	Trust: 1.6
vendor:	netgear	model:	wndr4300	scope:	lt	version:	1.0.2.98	Trust: 1.6
vendor:	netgear	model:	wndr3700	scope:	lt	version:	1.0.2.96	Trust: 1.0
vendor:	netgear	model:	wndr4500	scope:	lt	version:	1.0.0.50	Trust: 1.0
vendor:	netgear	model:	wndr4300	scope:	lt	version:	1.0.0.50	Trust: 1.0
vendor:	netgear	model:	r6100	scope:	eq	version:	1.0.1.20	Trust: 0.8
vendor:	netgear	model:	r9000	scope:	eq	version:	1.0.2.52	Trust: 0.8
vendor:	netgear	model:	wndr3700	scope:	eq	version:	1.0.2.96	Trust: 0.8
vendor:	netgear	model:	wndr4300	scope:	eq	version:	1.0.2.98	Trust: 0.8
vendor:	netgear	model:	wndr4500	scope:	eq	version:	1.0.0.50	Trust: 0.8
vendor:	netgear	model:	wndr4300v2	scope:	lt	version:	1.0.0.50	Trust: 0.6
vendor:	netgear	model:	wndr4500v3	scope:	lt	version:	1.0.0.50	Trust: 0.6
vendor:	netgear	model:	wndr3700v4	scope:	lt	version:	1.0.2.96	Trust: 0.6
vendor:	netgear	model:	r6100	scope:	eq	version:	1.0.1.12	Trust: 0.1
vendor:	netgear	model:	r6100	scope:	eq	version:	1.0.1.14	Trust: 0.1
vendor:	netgear	model:	r6100	scope:	eq	version:	1.0.1.16	Trust: 0.1
vendor:	netgear	model:	r9000	scope:	eq	version:	-	Trust: 0.1
vendor:	netgear	model:	r9000	scope:	eq	version:	1.0.2.4	Trust: 0.1
vendor:	netgear	model:	r9000	scope:	eq	version:	1.0.2.30	Trust: 0.1
vendor:	netgear	model:	r9000	scope:	eq	version:	1.0.2.40	Trust: 0.1
vendor:	netgear	model:	wndr3700	scope:	eq	version:	-	Trust: 0.1
vendor:	netgear	model:	wndr3700	scope:	eq	version:	1.0.2.86	Trust: 0.1
vendor:	netgear	model:	wndr3700	scope:	eq	version:	1.0.2.88	Trust: 0.1
vendor:	netgear	model:	wndr3700	scope:	eq	version:	1.0.2.92	Trust: 0.1
vendor:	netgear	model:	wndr3700	scope:	eq	version:	1.0.2.94	Trust: 0.1
vendor:	netgear	model:	wndr4300	scope:	eq	version:	1.0.0.48	Trust: 0.1
vendor:	netgear	model:	wndr4300	scope:	eq	version:	1.0.0.50	Trust: 0.1
vendor:	netgear	model:	wndr4300	scope:	eq	version:	1.0.0.52	Trust: 0.1
vendor:	netgear	model:	wndr4300	scope:	eq	version:	1.0.0.54	Trust: 0.1
vendor:	netgear	model:	wndr4300	scope:	eq	version:	1.0.0.56	Trust: 0.1
vendor:	netgear	model:	wndr4300	scope:	eq	version:	1.0.2.88	Trust: 0.1
vendor:	netgear	model:	wndr4300	scope:	eq	version:	1.0.2.90	Trust: 0.1
vendor:	netgear	model:	wndr4300	scope:	eq	version:	1.0.2.92	Trust: 0.1
vendor:	netgear	model:	wndr4300	scope:	eq	version:	1.0.2.94	Trust: 0.1
vendor:	netgear	model:	wndr4300	scope:	eq	version:	1.0.2.96	Trust: 0.1
vendor:	netgear	model:	wndr4500	scope:	eq	version:	-	Trust: 0.1
vendor:	netgear	model:	wndr4500	scope:	eq	version:	1.0.0.48	Trust: 0.1

sources: CNVD: CNVD-2021-46355 // VULMON: CVE-2018-21203 // JVNDB: JVNDB-2018-016352 // NVD: CVE-2018-21203

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2018-21203
value:	HIGH
Trust: 1.0
cve@mitre.org:	CVE-2018-21203
value:	HIGH
Trust: 1.0
NVD:	JVNDB-2018-016352
value:	HIGH
Trust: 0.8
CNVD:	CNVD-2021-46355
value:	MEDIUM
Trust: 0.6
CNNVD:	CNNVD-202004-2270
value:	HIGH
Trust: 0.6
VULMON:	CVE-2018-21203
value:	MEDIUM
Trust: 0.1

nvd@nist.gov:	CVE-2018-21203
severity:	MEDIUM
baseScore:	5.8
vectorString:	AV:A/AC:L/AU:N/C:P/I:P/A:P
accessVector:	ADJACENT_NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	PARTIAL
exploitabilityScore:	6.5
impactScore:	6.4
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.1
NVD:	JVNDB-2018-016352
severity:	MEDIUM
baseScore:	5.8
vectorString:	AV:A/AC:L/AU:N/C:P/I:P/A:P
accessVector:	ADJACENT NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	PARTIAL
exploitabilityScore:	NONE
impactScore:	NONE
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.8
CNVD:	CNVD-2021-46355
severity:	MEDIUM
baseScore:	5.8
vectorString:	AV:A/AC:L/AU:N/C:P/I:P/A:P
accessVector:	ADJACENT_NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	PARTIAL
exploitabilityScore:	6.5
impactScore:	6.4
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.6

nvd@nist.gov:	CVE-2018-21203
baseSeverity:	HIGH
baseScore:	8.8
vectorString:	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector:	ADJACENT
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	HIGH
exploitabilityScore:	2.8
impactScore:	5.9
version:	3.1
Trust: 1.0
cve@mitre.org:	CVE-2018-21203
baseSeverity:	HIGH
baseScore:	8.8
vectorString:	CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector:	ADJACENT
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	HIGH
exploitabilityScore:	2.8
impactScore:	5.9
version:	3.0
Trust: 1.0
NVD:	JVNDB-2018-016352
baseSeverity:	HIGH
baseScore:	8.8
vectorString:	CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector:	ADJACENT 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-2021-46355 // VULMON: CVE-2018-21203 // JVNDB: JVNDB-2018-016352 // CNNVD: CNNVD-202004-2270 // NVD: CVE-2018-21203 // NVD: CVE-2018-21203

PROBLEMTYPE DATA

problemtype:

CWE-787

Trust: 1.8

sources: JVNDB: JVNDB-2018-016352 // NVD: CVE-2018-21203

THREAT TYPE

remote or local

Trust: 0.6

sources: CNNVD: CNNVD-202004-2270

TYPE

buffer error

Trust: 0.6

sources: CNNVD: CNNVD-202004-2270

CONFIGURATIONS

sources: JVNDB: JVNDB-2018-016352

PATCH

title:	Security Advisory for Pre-Authentication Stack Overflow on Some Routers, PSV-2017-2589	url:	https://kb.netgear.com/000055146/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-Some-Routers-PSV-2017-2589	Trust: 0.8
title:	Patch for Buffer overflow vulnerabilities in multiple NETGEAR products (CNVD-2021-46355)	url:	https://www.cnvd.org.cn/patchInfo/show/275821	Trust: 0.6
title:	Multiple NETGEAR Product Buffer Error Vulnerability Fix	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=117362	Trust: 0.6

sources: CNVD: CNVD-2021-46355 // JVNDB: JVNDB-2018-016352 // CNNVD: CNNVD-202004-2270

EXTERNAL IDS

db:	NVD	id:	CVE-2018-21203	Trust: 3.1
db:	JVNDB	id:	JVNDB-2018-016352	Trust: 0.8
db:	CNVD	id:	CNVD-2021-46355	Trust: 0.6
db:	CNNVD	id:	CNNVD-202004-2270	Trust: 0.6
db:	VULMON	id:	CVE-2018-21203	Trust: 0.1

sources: CNVD: CNVD-2021-46355 // VULMON: CVE-2018-21203 // JVNDB: JVNDB-2018-016352 // CNNVD: CNNVD-202004-2270 // NVD: CVE-2018-21203

REFERENCES

url:	https://nvd.nist.gov/vuln/detail/cve-2018-21203	Trust: 2.0
url:	https://kb.netgear.com/000055146/security-advisory-for-pre-authentication-stack-overflow-on-some-routers-psv-2017-2589	Trust: 1.7
url:	https://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2018-21203	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-2021-46355 // VULMON: CVE-2018-21203 // JVNDB: JVNDB-2018-016352 // CNNVD: CNNVD-202004-2270 // NVD: CVE-2018-21203

SOURCES

db:	CNVD	id:	CNVD-2021-46355
db:	VULMON	id:	CVE-2018-21203
db:	JVNDB	id:	JVNDB-2018-016352
db:	CNNVD	id:	CNNVD-202004-2270
db:	NVD	id:	CVE-2018-21203

LAST UPDATE DATE

2024-11-23T22:55:10.089000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2021-46355	date:	2021-07-01T00:00:00
db:	VULMON	id:	CVE-2018-21203	date:	2020-05-04T00:00:00
db:	JVNDB	id:	JVNDB-2018-016352	date:	2020-06-01T00:00:00
db:	CNNVD	id:	CNNVD-202004-2270	date:	2020-05-06T00:00:00
db:	NVD	id:	CVE-2018-21203	date:	2024-11-21T04:03:10.033

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2021-46355	date:	2021-06-27T00:00:00
db:	VULMON	id:	CVE-2018-21203	date:	2020-04-28T00:00:00
db:	JVNDB	id:	JVNDB-2018-016352	date:	2020-06-01T00:00:00
db:	CNNVD	id:	CNNVD-202004-2270	date:	2020-04-28T00:00:00
db:	NVD	id:	CVE-2018-21203	date:	2020-04-28T16:15:13.387