Details of VAR-202106-1312

ID

VAR-202106-1312

CVE

CVE-2021-31642

TITLE

plural CHIYU Technology Made IoT Integer overflow vulnerability in device

Trust: 0.8

sources: JVNDB: JVNDB-2021-007490

DESCRIPTION

A denial of service condition exists after an integer overflow in several IoT devices from CHIYU Technology, including BIOSENSE, Webpass, and BF-630, BF-631, and SEMAC. The vulnerability can be explored by sending an unexpected integer (> 32 bits) on the page parameter that will crash the web portal and making it unavailable until a reboot of the device. Chiyu CHIYU BF-430 is a network server provided by Chiyu Technology (Chiyu) of Taiwan, China, which provides communication for access control, time and attendance systems and other equipment. The following products and versions are affected: BIOSENSE, Webpass, and BF-630, BF-631, SEMAC

Trust: 2.16

sources: NVD: CVE-2021-31642 // JVNDB: JVNDB-2021-007490 // CNNVD: CNNVD-202106-088

AFFECTED PRODUCTS

vendor:	chiyu tech	model:	biosense	scope:	eq	version:	-	Trust: 1.0
vendor:	chiyu tech	model:	bf-631	scope:	eq	version:	-	Trust: 1.0
vendor:	chiyu tech	model:	semac d2	scope:	eq	version:	-	Trust: 1.0
vendor:	chiyu tech	model:	semac d4	scope:	eq	version:	-	Trust: 1.0
vendor:	chiyu tech	model:	semac s1 osdp	scope:	eq	version:	-	Trust: 1.0
vendor:	chiyu tech	model:	semac s3v3	scope:	eq	version:	-	Trust: 1.0
vendor:	chiyu tech	model:	semac d1	scope:	eq	version:	-	Trust: 1.0
vendor:	chiyu tech	model:	bf-630	scope:	eq	version:	-	Trust: 1.0
vendor:	chiyu tech	model:	webpass	scope:	eq	version:	-	Trust: 1.0
vendor:	chiyu tech	model:	semac s2	scope:	eq	version:	-	Trust: 1.0
vendor:	chiyu tech	model:	semac d2 n300	scope:	eq	version:	-	Trust: 1.0
vendor:	chiyu	model:	semac s3v3	scope:	-	version:	-	Trust: 0.8
vendor:	chiyu	model:	semac d2 n300	scope:	-	version:	-	Trust: 0.8
vendor:	chiyu	model:	semac s1 osdp	scope:	-	version:	-	Trust: 0.8
vendor:	chiyu	model:	semac s2	scope:	-	version:	-	Trust: 0.8
vendor:	chiyu	model:	semac d1	scope:	-	version:	-	Trust: 0.8
vendor:	chiyu	model:	bf-631	scope:	-	version:	-	Trust: 0.8
vendor:	chiyu	model:	bf-630	scope:	-	version:	-	Trust: 0.8
vendor:	chiyu	model:	semac d4	scope:	-	version:	-	Trust: 0.8
vendor:	chiyu	model:	semac d2	scope:	-	version:	-	Trust: 0.8
vendor:	chiyu	model:	webpass	scope:	-	version:	-	Trust: 0.8

sources: JVNDB: JVNDB-2021-007490 // NVD: CVE-2021-31642

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2021-31642
value:	MEDIUM
Trust: 1.0
NVD:	CVE-2021-31642
value:	MEDIUM
Trust: 0.8
CNNVD:	CNNVD-202106-088
value:	MEDIUM
Trust: 0.6

nvd@nist.gov:	CVE-2021-31642
severity:	MEDIUM
baseScore:	6.8
vectorString:	AV:N/AC:L/AU:S/C:N/I:N/A:C
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	SINGLE
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	COMPLETE
exploitabilityScore:	8.0
impactScore:	6.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.8

nvd@nist.gov:	CVE-2021-31642
baseSeverity:	MEDIUM
baseScore:	6.5
vectorString:	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	LOW
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	2.8
impactScore:	3.6
version:	3.1
Trust: 1.0
NVD:	CVE-2021-31642
baseSeverity:	MEDIUM
baseScore:	6.5
vectorString:	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	LOW
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: JVNDB: JVNDB-2021-007490 // CNNVD: CNNVD-202106-088 // NVD: CVE-2021-31642

PROBLEMTYPE DATA

problemtype:	CWE-190	Trust: 1.0
problemtype:	Integer overflow or wraparound (CWE-190) [NVD Evaluation ]	Trust: 0.8

sources: JVNDB: JVNDB-2021-007490 // NVD: CVE-2021-31642

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202106-088

TYPE

input validation error

Trust: 0.6

sources: CNNVD: CNNVD-202106-088

PATCH

title:	Firmware update	url:	https://www.chiyu-tech.com/msg/message-Firmware-update-87.html	Trust: 0.8
title:	CHIYU Technology IoT devices Enter the fix for the verification error vulnerability	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=153512	Trust: 0.6

sources: JVNDB: JVNDB-2021-007490 // CNNVD: CNNVD-202106-088

EXTERNAL IDS

db:	NVD	id:	CVE-2021-31642	Trust: 3.2
db:	PACKETSTORM	id:	162934	Trust: 2.4
db:	JVNDB	id:	JVNDB-2021-007490	Trust: 0.8
db:	EXPLOIT-DB	id:	49937	Trust: 0.6
db:	CNNVD	id:	CNNVD-202106-088	Trust: 0.6

sources: JVNDB: JVNDB-2021-007490 // CNNVD: CNNVD-202106-088 // NVD: CVE-2021-31642

REFERENCES

url:	http://packetstormsecurity.com/files/162934/chiyu-iot-denial-of-service.html	Trust: 3.0
url:	https://www.chiyu-tech.com/msg/message-firmware-update-87.html	Trust: 1.6
url:	https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/	Trust: 1.6
url:	https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31642	Trust: 1.6
url:	https://nvd.nist.gov/vuln/detail/cve-2021-31642	Trust: 0.8
url:	https://www.exploit-db.com/exploits/49937	Trust: 0.6

sources: JVNDB: JVNDB-2021-007490 // CNNVD: CNNVD-202106-088 // NVD: CVE-2021-31642

SOURCES

db:	JVNDB	id:	JVNDB-2021-007490
db:	CNNVD	id:	CNNVD-202106-088
db:	NVD	id:	CVE-2021-31642

LAST UPDATE DATE

2024-08-14T14:31:42.622000+00:00

SOURCES UPDATE DATE

db:	JVNDB	id:	JVNDB-2021-007490	date:	2022-02-14T09:15:00
db:	CNNVD	id:	CNNVD-202106-088	date:	2021-06-10T00:00:00
db:	NVD	id:	CVE-2021-31642	date:	2021-06-08T19:09:55.183

SOURCES RELEASE DATE

db:	JVNDB	id:	JVNDB-2021-007490	date:	2022-02-14T00:00:00
db:	CNNVD	id:	CNNVD-202106-088	date:	2021-06-01T00:00:00
db:	NVD	id:	CVE-2021-31642	date:	2021-06-01T15:15:07.717