Details of VAR-202112-0187

ID

VAR-202112-0187

CVE

CVE-2021-33271

TITLE

D-Link DIR-809 Out-of-bounds write vulnerabilities in devices

Trust: 0.8

sources: JVNDB: JVNDB-2021-015744

DESCRIPTION

D-Link DIR-809 devices with firmware through DIR-809Ax_FW1.12WWB03_20190410 were discovered to contain a stack buffer overflow vulnerability in the function sub_80046EB4 in /formSetPortTr. This vulnerability is triggered via a crafted POST request. D-Link DIR-809 The device contains a vulnerability related to out-of-bounds writes.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be in a state. D-Link DIR-809 is a dual-band router of China D-Link. There is a buffer error vulnerability in D-Link DIR-809, which is caused by the failure of the sub_80046EB4 function in the product/formSetPortTr link to effectively determine the data boundary. Attackers can use POST requests to cause buffer overflow, resulting in denial of service or code execution

Trust: 2.16

sources: NVD: CVE-2021-33271 // JVNDB: JVNDB-2021-015744 // CNVD: CNVD-2021-94721

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2021-94721

AFFECTED PRODUCTS

vendor:	dlink	model:	dir-809	scope:	lte	version:	1.12wwb03	Trust: 1.0
vendor:	d link	model:	dir-809	scope:	eq	version:	dir-809 firmware	Trust: 0.8
vendor:	d link	model:	dir-809	scope:	eq	version:	-	Trust: 0.8
vendor:	d link	model:	dir-809	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	dir-809 ax fw1.12wwb03 20190410	scope:	-	version:	-	Trust: 0.6

sources: CNVD: CNVD-2021-94721 // JVNDB: JVNDB-2021-015744 // NVD: CVE-2021-33271

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2021-33271
value:	CRITICAL
Trust: 1.0
NVD:	CVE-2021-33271
value:	CRITICAL
Trust: 0.8
CNVD:	CNVD-2021-94721
value:	HIGH
Trust: 0.6
CNNVD:	CNNVD-202112-050
value:	CRITICAL
Trust: 0.6

nvd@nist.gov:	CVE-2021-33271
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: 1.8
CNVD:	CNVD-2021-94721
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-2021-33271
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-2021-33271
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-2021-94721 // JVNDB: JVNDB-2021-015744 // CNNVD: CNNVD-202112-050 // NVD: CVE-2021-33271

PROBLEMTYPE DATA

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

sources: JVNDB: JVNDB-2021-015744 // NVD: CVE-2021-33271

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202112-050

TYPE

buffer error

Trust: 0.6

sources: CNNVD: CNNVD-202112-050

PATCH

title:	Security Bulletin	url:	https://www.dlink.com/en/security-bulletin	Trust: 0.8
title:	Patch for D-Link DIR-809 formSetPortTr buffer overflow vulnerability	url:	https://www.cnvd.org.cn/patchInfo/show/302866	Trust: 0.6
title:	D-Link DIR-809 Buffer error vulnerability fix	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=172790	Trust: 0.6

sources: CNVD: CNVD-2021-94721 // JVNDB: JVNDB-2021-015744 // CNNVD: CNNVD-202112-050

EXTERNAL IDS

db:	NVD	id:	CVE-2021-33271	Trust: 3.8
db:	JVNDB	id:	JVNDB-2021-015744	Trust: 0.8
db:	CNVD	id:	CNVD-2021-94721	Trust: 0.6
db:	CNNVD	id:	CNNVD-202112-050	Trust: 0.6

sources: CNVD: CNVD-2021-94721 // JVNDB: JVNDB-2021-015744 // CNNVD: CNNVD-202112-050 // NVD: CVE-2021-33271

REFERENCES

url:	https://github.com/lnkvct/iot-poc/tree/master/d-link-dir809/vuln11	Trust: 3.0
url:	https://www.dlink.com/en/security-bulletin/	Trust: 1.6
url:	https://nvd.nist.gov/vuln/detail/cve-2021-33271	Trust: 1.4

sources: CNVD: CNVD-2021-94721 // JVNDB: JVNDB-2021-015744 // CNNVD: CNNVD-202112-050 // NVD: CVE-2021-33271

SOURCES

db:	CNVD	id:	CNVD-2021-94721
db:	JVNDB	id:	JVNDB-2021-015744
db:	CNNVD	id:	CNNVD-202112-050
db:	NVD	id:	CVE-2021-33271

LAST UPDATE DATE

2024-08-14T14:18:13.737000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2021-94721	date:	2021-12-06T00:00:00
db:	JVNDB	id:	JVNDB-2021-015744	date:	2022-11-29T08:54:00
db:	CNNVD	id:	CNNVD-202112-050	date:	2021-12-09T00:00:00
db:	NVD	id:	CVE-2021-33271	date:	2021-12-03T13:41:48.373

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2021-94721	date:	2021-12-06T00:00:00
db:	JVNDB	id:	JVNDB-2021-015744	date:	2022-11-29T00:00:00
db:	CNNVD	id:	CNNVD-202112-050	date:	2021-12-01T00:00:00
db:	NVD	id:	CVE-2021-33271	date:	2021-12-01T22:15:07.863