Details of VAR-202002-0939

ID

VAR-202002-0939

CVE

CVE-2020-3923

TITLE

TAT-76 and TAT-77 Unauthorized authentication vulnerabilities in the series

Trust: 0.8

sources: JVNDB: JVNDB-2020-002412

DESCRIPTION

DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET, contain misconfigured authentication mechanism. Attackers can crack the default password and gain access to the system. TAT-76 and TAT-77 The series contains vulnerabilities related to fraudulent authentication.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be put into a state. Tonnet TAT-76 is a network camera device

Trust: 2.16

sources: NVD: CVE-2020-3923 // JVNDB: JVNDB-2020-002412 // CNVD: CNVD-2020-14864

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2020-14864

AFFECTED PRODUCTS

vendor:	tonnet	model:	tat-76108g3	scope:	lte	version:	20181221_76208g3	Trust: 1.0
vendor:	tonnet	model:	tat-76116g3	scope:	lte	version:	20181221_76216g3	Trust: 1.0
vendor:	tonnet	model:	tat-76132g3	scope:	lte	version:	tat-70832g3_20181221-1	Trust: 1.0
vendor:	tonnet	model:	tat-71416g1	scope:	lte	version:	tat-71416g1_20181225	Trust: 1.0
vendor:	tonnet	model:	tat-77104g1	scope:	lte	version:	tat-77104g1_20190107	Trust: 1.0
vendor:	tonnet	model:	tat-76104g3	scope:	lte	version:	20181220_76104g3	Trust: 1.0
vendor:	tonnet	model:	tat-70432n	scope:	lte	version:	tat-77208g1_20181225	Trust: 1.0
vendor:	tonnet	model:	tat-71832g1	scope:	lte	version:	tat-71832g1_20190510	Trust: 1.0
vendor:	tonnet	model:	tat-70432n	scope:	-	version:	-	Trust: 0.8
vendor:	tonnet	model:	tat-71416g1	scope:	-	version:	-	Trust: 0.8
vendor:	tonnet	model:	tat-71832g1	scope:	-	version:	-	Trust: 0.8
vendor:	tonnet	model:	tat-76104g3	scope:	-	version:	-	Trust: 0.8
vendor:	tonnet	model:	tat-76108g3	scope:	-	version:	-	Trust: 0.8
vendor:	tonnet	model:	tat-76116g3	scope:	-	version:	-	Trust: 0.8
vendor:	tonnet	model:	tat-76132g3	scope:	-	version:	-	Trust: 0.8
vendor:	tonnet	model:	tat-77104g1	scope:	-	version:	-	Trust: 0.8
vendor:	tonnet	model:	tat-76	scope:	-	version:	-	Trust: 0.6
vendor:	tonnet	model:	tat-77	scope:	-	version:	-	Trust: 0.6

sources: CNVD: CNVD-2020-14864 // JVNDB: JVNDB-2020-002412 // NVD: CVE-2020-3923

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2020-3923
value:	CRITICAL
Trust: 1.0
twcert@cert.org.tw:	CVE-2020-3923
value:	HIGH
Trust: 1.0
NVD:	JVNDB-2020-002412
value:	CRITICAL
Trust: 0.8
CNVD:	CNVD-2020-14864
value:	HIGH
Trust: 0.6
CNNVD:	CNNVD-202002-1289
value:	CRITICAL
Trust: 0.6

nvd@nist.gov:	CVE-2020-3923
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: 1.0
NVD:	JVNDB-2020-002412
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:	NONE
impactScore:	NONE
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.8
CNVD:	CNVD-2020-14864
severity:	HIGH
baseScore:	7.6
vectorString:	AV:N/AC:H/AU:N/C:C/I:C/A:C
accessVector:	NETWORK
accessComplexity:	HIGH
authentication:	NONE
confidentialityImpact:	COMPLETE
integrityImpact:	COMPLETE
availabilityImpact:	COMPLETE
exploitabilityScore:	4.9
impactScore:	10.0
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.6

nvd@nist.gov:	CVE-2020-3923
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
twcert@cert.org.tw:	CVE-2020-3923
baseSeverity:	HIGH
baseScore:	8.1
vectorString:	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector:	NETWORK
attackComplexity:	HIGH
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	HIGH
exploitabilityScore:	2.2
impactScore:	5.9
version:	3.1
Trust: 1.0
NVD:	JVNDB-2020-002412
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-2020-14864 // JVNDB: JVNDB-2020-002412 // CNNVD: CNNVD-202002-1289 // NVD: CVE-2020-3923 // NVD: CVE-2020-3923

PROBLEMTYPE DATA

problemtype:	CWE-287	Trust: 1.0
problemtype:	CWE-863	Trust: 0.8

sources: JVNDB: JVNDB-2020-002412 // NVD: CVE-2020-3923

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202002-1289

TYPE

access control error

Trust: 0.6

sources: CNNVD: CNNVD-202002-1289

CONFIGURATIONS

sources: JVNDB: JVNDB-2020-002412

PATCH

title:	Top Page	url:	https://www.tonnet.com.tw/	Trust: 0.8
title:	Patch for Tonnet TAT-76 Default Password Authentication Bypass Vulnerability	url:	https://www.cnvd.org.cn/patchInfo/show/206263	Trust: 0.6
title:	Tonnet TAT-76 and TAT-77 Fixes for access control error vulnerabilities	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=111091	Trust: 0.6

sources: CNVD: CNVD-2020-14864 // JVNDB: JVNDB-2020-002412 // CNNVD: CNNVD-202002-1289

EXTERNAL IDS

db:	NVD	id:	CVE-2020-3923	Trust: 3.0
db:	TWCERT	id:	TVN-201910003	Trust: 2.2
db:	JVNDB	id:	JVNDB-2020-002412	Trust: 0.8
db:	CNVD	id:	CNVD-2020-14864	Trust: 0.6
db:	CNNVD	id:	CNNVD-202002-1289	Trust: 0.6

sources: CNVD: CNVD-2020-14864 // JVNDB: JVNDB-2020-002412 // CNNVD: CNNVD-202002-1289 // NVD: CVE-2020-3923

REFERENCES

url:	https://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcf	Trust: 2.4
url:	https://tvn.twcert.org.tw/taiwanvn/tvn-201910003	Trust: 2.2
url:	https://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2020-3923	Trust: 0.8
url:	https://nvd.nist.gov/vuln/detail/cve-2020-3923	Trust: 0.8

sources: CNVD: CNVD-2020-14864 // JVNDB: JVNDB-2020-002412 // CNNVD: CNNVD-202002-1289 // NVD: CVE-2020-3923

CREDITS

Weber Tsai (CHT Security) , Keniver Wang (CHT Security) , Redhung Chen (CHT Security Intern)

Trust: 0.6

sources: CNNVD: CNNVD-202002-1289

SOURCES

db:	CNVD	id:	CNVD-2020-14864
db:	JVNDB	id:	JVNDB-2020-002412
db:	CNNVD	id:	CNNVD-202002-1289
db:	NVD	id:	CVE-2020-3923

LAST UPDATE DATE

2024-11-23T23:11:33.829000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2020-14864	date:	2020-03-02T00:00:00
db:	JVNDB	id:	JVNDB-2020-002412	date:	2020-03-13T00:00:00
db:	CNNVD	id:	CNNVD-202002-1289	date:	2021-01-05T00:00:00
db:	NVD	id:	CVE-2020-3923	date:	2024-11-21T05:31:57.977

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2020-14864	date:	2020-03-02T00:00:00
db:	JVNDB	id:	JVNDB-2020-002412	date:	2020-03-13T00:00:00
db:	CNNVD	id:	CNNVD-202002-1289	date:	2020-02-27T00:00:00
db:	NVD	id:	CVE-2020-3923	date:	2020-02-27T04:15:10.577