Details of VAR-201704-1324

ID

VAR-201704-1324

CVE

CVE-2017-8218

TITLE

TP-Link C2 and C20i Vulnerabilities related to certificate / password management in device firmware

Trust: 0.8

sources: JVNDB: JVNDB-2017-003637

DESCRIPTION

vsftpd on TP-Link C2 and C20i devices through firmware 0.9.1 4.2 v0032.0 Build 160706 Rel.37961n has a backdoor admin account with the 1234 password, a backdoor guest account with the guest password, and a backdoor test account with the test password. TP-Link C2 and C20i The device firmware contains a vulnerability related to certificate and password management.Information is obtained, information is altered, and service operation is disrupted (DoS) An attack may be carried out. TP-LINKC2 and C20i are all wireless router products of China TP-LINK. Vsftpd is a server running on a UNIX-like operating system. TP-LinkC2 and C20i have security bypass vulnerabilities that allow remote attackers to exploit special vulnerabilities to submit special requests to bypass security restrictions and perform unauthorized operations. There is a security vulnerability in vsftpd in TP-Link C2 and C20i using firmware 0.9.1 4.2 v0032.0 Build 160706 Rel.37961n and earlier

Trust: 2.25

sources: NVD: CVE-2017-8218 // JVNDB: JVNDB-2017-003637 // CNVD: CNVD-2017-06904 // VULHUB: VHN-116421

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2017-06904

AFFECTED PRODUCTS

vendor:	tp link	model:	c20i	scope:	lte	version:	0.9.1_4.2_v0032.0_build_160706	Trust: 1.0
vendor:	tp link	model:	c2	scope:	lte	version:	0.9.1_4.2_v0032.0_build_160706	Trust: 1.0
vendor:	tp link	model:	c2	scope:	lte	version:	0.9.1 4.2 v0032.0 build 160706 rel.37961n	Trust: 0.8
vendor:	tp link	model:	c20i	scope:	lte	version:	0.9.1 4.2 v0032.0 build 160706 rel.37961n	Trust: 0.8
vendor:	tp link	model:	c2 build rel.37961n	scope:	lte	version:	<=0.9.14.2v0032.0160706	Trust: 0.6
vendor:	tp link	model:	c20i build rel.37961n	scope:	lte	version:	<=0.9.14.2v0032.0160706	Trust: 0.6
vendor:	tp link	model:	c2	scope:	eq	version:	0.9.1_4.2_v0032.0_build_160706	Trust: 0.6
vendor:	tp link	model:	c20i	scope:	eq	version:	0.9.1_4.2_v0032.0_build_160706	Trust: 0.6

sources: CNVD: CNVD-2017-06904 // JVNDB: JVNDB-2017-003637 // CNNVD: CNNVD-201704-1460 // NVD: CVE-2017-8218

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2017-8218
value:	CRITICAL
Trust: 1.0
NVD:	CVE-2017-8218
value:	CRITICAL
Trust: 0.8
CNVD:	CNVD-2017-06904
value:	HIGH
Trust: 0.6
CNNVD:	CNNVD-201704-1460
value:	CRITICAL
Trust: 0.6
VULHUB:	VHN-116421
value:	HIGH
Trust: 0.1

nvd@nist.gov:	CVE-2017-8218
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-2017-06904
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
VULHUB:	VHN-116421
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: 0.1

nvd@nist.gov:	CVE-2017-8218
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:	3.9
impactScore:	5.9
version:	3.0
Trust: 1.8

sources: CNVD: CNVD-2017-06904 // VULHUB: VHN-116421 // JVNDB: JVNDB-2017-003637 // CNNVD: CNNVD-201704-1460 // NVD: CVE-2017-8218

PROBLEMTYPE DATA

problemtype:	CWE-1188	Trust: 1.0
problemtype:	CWE-255	Trust: 0.9

sources: VULHUB: VHN-116421 // JVNDB: JVNDB-2017-003637 // NVD: CVE-2017-8218

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-201704-1460

TYPE

trust management problem

Trust: 0.6

sources: CNNVD: CNNVD-201704-1460

CONFIGURATIONS

sources: JVNDB: JVNDB-2017-003637

PATCH

title:	Details - CVE-2017-8218 - Misc	url:	https://pierrekim.github.io/blog/2017-02-09-tplink-c2-and-c20i-vulnerable.html	Trust: 0.8
title:	Patch for TP-LinkC2 and C20i Security Bypass Vulnerability (CNVD-2017-06904)	url:	https://www.cnvd.org.cn/patchInfo/show/93753	Trust: 0.6

sources: CNVD: CNVD-2017-06904 // JVNDB: JVNDB-2017-003637

EXTERNAL IDS

db:	NVD	id:	CVE-2017-8218	Trust: 3.1
db:	JVNDB	id:	JVNDB-2017-003637	Trust: 0.8
db:	CNNVD	id:	CNNVD-201704-1460	Trust: 0.7
db:	CNVD	id:	CNVD-2017-06904	Trust: 0.6
db:	VULHUB	id:	VHN-116421	Trust: 0.1

sources: CNVD: CNVD-2017-06904 // VULHUB: VHN-116421 // JVNDB: JVNDB-2017-003637 // CNNVD: CNNVD-201704-1460 // NVD: CVE-2017-8218

REFERENCES

url:	https://pierrekim.github.io/blog/2017-02-09-tplink-c2-and-c20i-vulnerable.html	Trust: 2.3
url:	https://nvd.nist.gov/vuln/detail/cve-2017-8218	Trust: 1.4
url:	http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2017-8218	Trust: 0.8

sources: CNVD: CNVD-2017-06904 // VULHUB: VHN-116421 // JVNDB: JVNDB-2017-003637 // CNNVD: CNNVD-201704-1460 // NVD: CVE-2017-8218

SOURCES

db:	CNVD	id:	CNVD-2017-06904
db:	VULHUB	id:	VHN-116421
db:	JVNDB	id:	JVNDB-2017-003637
db:	CNNVD	id:	CNNVD-201704-1460
db:	NVD	id:	CVE-2017-8218

LAST UPDATE DATE

2025-04-20T23:36:55.322000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2017-06904	date:	2017-05-18T00:00:00
db:	VULHUB	id:	VHN-116421	date:	2019-10-03T00:00:00
db:	JVNDB	id:	JVNDB-2017-003637	date:	2017-06-01T00:00:00
db:	CNNVD	id:	CNNVD-201704-1460	date:	2019-10-23T00:00:00
db:	NVD	id:	CVE-2017-8218	date:	2025-04-20T01:37:25.860

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2017-06904	date:	2017-05-18T00:00:00
db:	VULHUB	id:	VHN-116421	date:	2017-04-25T00:00:00
db:	JVNDB	id:	JVNDB-2017-003637	date:	2017-06-01T00:00:00
db:	CNNVD	id:	CNNVD-201704-1460	date:	2017-04-27T00:00:00
db:	NVD	id:	CVE-2017-8218	date:	2017-04-25T20:59:00.197