Details of VAR-202202-1218

ID

VAR-202202-1218

CVE

CVE-2021-21971

TITLE

Sealevel Systems, Inc. SeaConnect 370W Out-of-bounds write vulnerability in

Trust: 0.8

sources: JVNDB: JVNDB-2022-004714

DESCRIPTION

An out-of-bounds write vulnerability exists in the URL_decode functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to an out-of-bounds write. An attacker can perform a man-in-the-middle attack to trigger this vulnerability. Sealevel Systems, Inc. Used to remotely monitor and control the status of the actual I/O process. A buffer error vulnerability exists in Sealevel Systems SeaConnect 370W, which is caused by the product's OTA update task function not effectively limiting memory boundaries. An attacker can cause an out-of-bounds write and cause a denial of service through a specially crafted network packet

Trust: 2.7

sources: NVD: CVE-2021-21971 // JVNDB: JVNDB-2022-004714 // CNVD: CNVD-2022-10701 // CNNVD: CNNVD-202202-100

IOT TAXONOMY

category:

['IoT']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2022-10701

AFFECTED PRODUCTS

vendor:	sealevel	model:	seaconnect 370w	scope:	eq	version:	1.3.34	Trust: 1.0
vendor:	sealevel	model:	seaconnect 370w	scope:	eq	version:	-	Trust: 0.8
vendor:	sealevel	model:	seaconnect 370w	scope:	eq	version:	seaconnect 370w firmware 1.3.34	Trust: 0.8
vendor:	sealevel	model:	systems seaconnect 370w	scope:	eq	version:	v1.3.34	Trust: 0.6

sources: CNVD: CNVD-2022-10701 // JVNDB: JVNDB-2022-004714 // NVD: CVE-2021-21971

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2021-21971
value:	MEDIUM
Trust: 1.0
talos-cna@cisco.com:	CVE-2021-21971
value:	LOW
Trust: 1.0
NVD:	CVE-2021-21971
value:	MEDIUM
Trust: 0.8
CNVD:	CNVD-2022-10701
value:	MEDIUM
Trust: 0.6
CNNVD:	CNNVD-202202-100
value:	MEDIUM
Trust: 0.6

nvd@nist.gov:	CVE-2021-21971
severity:	MEDIUM
baseScore:	4.3
vectorString:	AV:N/AC:M/AU:N/C:N/I:P/A:N
accessVector:	NETWORK
accessComplexity:	MEDIUM
authentication:	NONE
confidentialityImpact:	NONE
integrityImpact:	PARTIAL
availabilityImpact:	NONE
exploitabilityScore:	8.6
impactScore:	2.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.8
CNVD:	CNVD-2022-10701
severity:	MEDIUM
baseScore:	4.3
vectorString:	AV:N/AC:M/AU:N/C:N/I:P/A:N
accessVector:	NETWORK
accessComplexity:	MEDIUM
authentication:	NONE
confidentialityImpact:	NONE
integrityImpact:	PARTIAL
availabilityImpact:	NONE
exploitabilityScore:	8.6
impactScore:	2.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.6

nvd@nist.gov:	CVE-2021-21971
baseSeverity:	MEDIUM
baseScore:	5.9
vectorString:	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
attackVector:	NETWORK
attackComplexity:	HIGH
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	HIGH
availabilityImpact:	NONE
exploitabilityScore:	2.2
impactScore:	3.6
version:	3.1
Trust: 1.0
talos-cna@cisco.com:	CVE-2021-21971
baseSeverity:	LOW
baseScore:	3.7
vectorString:	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
attackVector:	NETWORK
attackComplexity:	HIGH
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	LOW
availabilityImpact:	NONE
exploitabilityScore:	2.2
impactScore:	1.4
version:	3.0
Trust: 1.0
NVD:	CVE-2021-21971
baseSeverity:	MEDIUM
baseScore:	5.9
vectorString:	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
attackVector:	NETWORK
attackComplexity:	HIGH
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	HIGH
availabilityImpact:	NONE
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: CNVD: CNVD-2022-10701 // JVNDB: JVNDB-2022-004714 // CNNVD: CNNVD-202202-100 // NVD: CVE-2021-21971 // NVD: CVE-2021-21971

PROBLEMTYPE DATA

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

sources: JVNDB: JVNDB-2022-004714 // NVD: CVE-2021-21971

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202202-100

TYPE

buffer error

Trust: 0.6

sources: CNNVD: CNNVD-202202-100

PATCH

title:	Top Page	url:	https://www.sealevel.com/	Trust: 0.8
title:	Patch for Sealevel Systems SeaConnect 370W Buffer Overflow Vulnerability (CNVD-2022-10701)	url:	https://www.cnvd.org.cn/patchInfo/show/319851	Trust: 0.6
title:	Sealevel Systems SeaConnect 370W Buffer error vulnerability fix	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=181521	Trust: 0.6

sources: CNVD: CNVD-2022-10701 // JVNDB: JVNDB-2022-004714 // CNNVD: CNNVD-202202-100

EXTERNAL IDS

db:	NVD	id:	CVE-2021-21971	Trust: 3.8
db:	TALOS	id:	TALOS-2021-1397	Trust: 2.4
db:	TALOS	id:	TALOS-2021-1406	Trust: 2.2
db:	JVNDB	id:	JVNDB-2022-004714	Trust: 0.8
db:	CNVD	id:	CNVD-2022-10701	Trust: 0.6
db:	CNNVD	id:	CNNVD-202202-100	Trust: 0.6

sources: CNVD: CNVD-2022-10701 // JVNDB: JVNDB-2022-004714 // CNNVD: CNNVD-202202-100 // NVD: CVE-2021-21971

REFERENCES

url:	https://talosintelligence.com/vulnerability_reports/talos-2021-1397	Trust: 3.0
url:	https://talosintelligence.com/vulnerability_reports/talos-2021-1406	Trust: 2.2
url:	https://nvd.nist.gov/vuln/detail/cve-2021-21971	Trust: 1.4

sources: CNVD: CNVD-2022-10701 // JVNDB: JVNDB-2022-004714 // CNNVD: CNNVD-202202-100 // NVD: CVE-2021-21971

CREDITS

Discovered by Francesco Benvenuto and Matt Wiseman of Cisco Talos.

Trust: 0.6

sources: CNNVD: CNNVD-202202-100

SOURCES

db:	CNVD	id:	CNVD-2022-10701
db:	JVNDB	id:	JVNDB-2022-004714
db:	CNNVD	id:	CNNVD-202202-100
db:	NVD	id:	CVE-2021-21971

LAST UPDATE DATE

2024-08-14T13:42:58.798000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2022-10701	date:	2022-02-16T00:00:00
db:	JVNDB	id:	JVNDB-2022-004714	date:	2023-04-28T08:27:00
db:	CNNVD	id:	CNNVD-202202-100	date:	2022-02-17T00:00:00
db:	NVD	id:	CVE-2021-21971	date:	2022-07-29T16:29:14.547

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2022-10701	date:	2022-02-16T00:00:00
db:	JVNDB	id:	JVNDB-2022-004714	date:	2023-04-28T00:00:00
db:	CNNVD	id:	CNNVD-202202-100	date:	2022-02-01T00:00:00
db:	NVD	id:	CVE-2021-21971	date:	2022-02-04T23:15:10.830