Details of VAR-201512-0517

ID

VAR-201512-0517

CVE

CVE-2015-7794

TITLE

CG-WLNCM4G may behave as an open resolver

Trust: 0.8

sources: JVNDB: JVNDB-2015-000203

DESCRIPTION

Corega CG-WLNCM4G devices provide an open DNS resolver, which allows remote attackers to cause a denial of service (traffic amplification) via crafted queries. CG-WLNCM4G provided by Corega Inc is a network camera. CG-WLNCM4G contains an issue where it may behave as an open resolver. SASABE Tetsuro of The University of Tokyo reported this vulnerability to IPA. JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.The device may be leveraged for use in a DNS amplification attack and unknowingly become a part of a DDoS attack. Corega CG-WLNCM4G devices has a denial of service vulnerability. CG-WLNCM4G is prone to a denial-of-service vulnerability. An attacker can exploit this issue to cause a denial-of-service condition. Corega CG-WLBARGL is a wireless LAN router produced by Japan's Corega Corporation. A security vulnerability exists in the Corega CG-WLBARAGM device due to the program providing an open DNS resolver

Trust: 2.52

sources: NVD: CVE-2015-7794 // JVNDB: JVNDB-2015-000203 // CNVD: CNVD-2015-08531 // BID: 79716 // VULHUB: VHN-85755

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2015-08531

AFFECTED PRODUCTS

vendor:	corega	model:	cg-wlncm4g	scope:	-	version:	-	Trust: 2.0
vendor:	corega	model:	cg-wlncm4g	scope:	eq	version:	*	Trust: 1.0
vendor:	corega	model:	inc cg-wlncm4g	scope:	eq	version:	0	Trust: 0.3

sources: CNVD: CNVD-2015-08531 // BID: 79716 // JVNDB: JVNDB-2015-000203 // CNNVD: CNNVD-201512-704 // NVD: CVE-2015-7794

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2015-7794
value:	MEDIUM
Trust: 1.0
IPA:	JVNDB-2015-000203
value:	MEDIUM
Trust: 0.8
CNVD:	CNVD-2015-08531
value:	MEDIUM
Trust: 0.6
CNNVD:	CNNVD-201512-704
value:	MEDIUM
Trust: 0.6
VULHUB:	VHN-85755
value:	MEDIUM
Trust: 0.1

nvd@nist.gov:	CVE-2015-7794
severity:	MEDIUM
baseScore:	5.0
vectorString:	AV:N/AC:L/AU:N/C:N/I:N/A:P
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	PARTIAL
exploitabilityScore:	10.0
impactScore:	2.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.0
IPA:	JVNDB-2015-000203
severity:	MEDIUM
baseScore:	5.0
vectorString:	AV:N/AC:L/AU:N/C:N/I:N/A:P
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	PARTIAL
exploitabilityScore:	NONE
impactScore:	NONE
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.8
CNVD:	CNVD-2015-08531
severity:	MEDIUM
baseScore:	5.0
vectorString:	AV:N/AC:L/AU:N/C:N/I:N/A:P
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	PARTIAL
exploitabilityScore:	10.0
impactScore:	2.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.6
VULHUB:	VHN-85755
severity:	MEDIUM
baseScore:	5.0
vectorString:	AV:N/AC:L/AU:N/C:N/I:N/A:P
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	PARTIAL
exploitabilityScore:	10.0
impactScore:	2.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.1

nvd@nist.gov:	CVE-2015-7794
baseSeverity:	MEDIUM
baseScore:	5.8
vectorString:	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	CHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	LOW
exploitabilityScore:	3.9
impactScore:	1.4
version:	3.0
Trust: 1.0
IPA:	JVNDB-2015-000203
baseSeverity:	MEDIUM
baseScore:	5.8
vectorString:	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	CHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	LOW
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: CNVD: CNVD-2015-08531 // VULHUB: VHN-85755 // JVNDB: JVNDB-2015-000203 // CNNVD: CNNVD-201512-704 // NVD: CVE-2015-7794

PROBLEMTYPE DATA

problemtype:	CWE-20	Trust: 1.1
problemtype:	CWE-264	Trust: 0.8

sources: VULHUB: VHN-85755 // JVNDB: JVNDB-2015-000203 // NVD: CVE-2015-7794

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-201512-704

TYPE

input validation

Trust: 0.6

sources: CNNVD: CNNVD-201512-704

CONFIGURATIONS

sources: JVNDB: JVNDB-2015-000203

PATCH

title:	About the issue that may behave as an open resolver	url:	http://corega.jp/support/security/20151224_wlncm4g.htm	Trust: 0.8
title:	Corega CG-WLNCM4G devices denial of service vulnerability patch	url:	https://www.cnvd.org.cn/patchInfo/show/69281	Trust: 0.6

sources: CNVD: CNVD-2015-08531 // JVNDB: JVNDB-2015-000203

EXTERNAL IDS

db:	NVD	id:	CVE-2015-7794	Trust: 3.4
db:	JVNDB	id:	JVNDB-2015-000203	Trust: 3.1
db:	JVN	id:	JVN51250073	Trust: 2.8
db:	CNNVD	id:	CNNVD-201512-704	Trust: 0.7
db:	CNVD	id:	CNVD-2015-08531	Trust: 0.6
db:	BID	id:	79716	Trust: 0.4
db:	VULHUB	id:	VHN-85755	Trust: 0.1

sources: CNVD: CNVD-2015-08531 // VULHUB: VHN-85755 // BID: 79716 // JVNDB: JVNDB-2015-000203 // CNNVD: CNNVD-201512-704 // NVD: CVE-2015-7794

REFERENCES

url:	http://jvn.jp/en/jp/jvn51250073/index.html	Trust: 2.8
url:	http://corega.jp/support/security/20151224_wlncm4g.htm	Trust: 1.7
url:	http://jvndb.jvn.jp/jvndb/jvndb-2015-000203	Trust: 1.7
url:	https://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2015-7794	Trust: 0.8
url:	https://web.nvd.nist.gov/view/vuln/detail?vulnid=cve-2015-7794	Trust: 0.8
url:	http://jvndb.jvn.jp/en/contents/2015/jvndb-2015-000203.html	Trust: 0.6
url:	http://corega.jp/support/security/20151224_wlbaragm.htm	Trust: 0.3

sources: CNVD: CNVD-2015-08531 // VULHUB: VHN-85755 // BID: 79716 // JVNDB: JVNDB-2015-000203 // CNNVD: CNNVD-201512-704 // NVD: CVE-2015-7794

CREDITS

SASABE Tetsuro of The University of Tokyo

Trust: 0.3

sources: BID: 79716

SOURCES

db:	CNVD	id:	CNVD-2015-08531
db:	VULHUB	id:	VHN-85755
db:	BID	id:	79716
db:	JVNDB	id:	JVNDB-2015-000203
db:	CNNVD	id:	CNNVD-201512-704
db:	NVD	id:	CVE-2015-7794

LAST UPDATE DATE

2025-04-13T23:29:31.127000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2015-08531	date:	2015-12-31T00:00:00
db:	VULHUB	id:	VHN-85755	date:	2015-12-30T00:00:00
db:	BID	id:	79716	date:	2015-12-25T00:00:00
db:	JVNDB	id:	JVNDB-2015-000203	date:	2016-01-07T00:00:00
db:	CNNVD	id:	CNNVD-201512-704	date:	2015-12-31T00:00:00
db:	NVD	id:	CVE-2015-7794	date:	2025-04-12T10:46:40.837

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2015-08531	date:	2015-12-31T00:00:00
db:	VULHUB	id:	VHN-85755	date:	2015-12-30T00:00:00
db:	BID	id:	79716	date:	2015-12-25T00:00:00
db:	JVNDB	id:	JVNDB-2015-000203	date:	2015-12-25T00:00:00
db:	CNNVD	id:	CNNVD-201512-704	date:	2015-12-31T00:00:00
db:	NVD	id:	CVE-2015-7794	date:	2015-12-30T05:59:13.940