Details of VAR-202105-0851

ID

VAR-202105-0851

CVE

CVE-2021-30191

TITLE

CODESYS V2 Web-Server Buffer Overflow Vulnerability in Linux

Trust: 0.8

sources: JVNDB: JVNDB-2021-007169

DESCRIPTION

CODESYS V2 Web-Server before 1.1.9.20 has a a Buffer Copy without Checking the Size of the Input. CODESYS V2 Web-Server Contains a classic buffer overflow vulnerability.Denial of service (DoS) It may be put into a state

Trust: 1.71

sources: NVD: CVE-2021-30191 // JVNDB: JVNDB-2021-007169 // VULMON: CVE-2021-30191

AFFECTED PRODUCTS

vendor:	wago	model:	750-8204	scope:	lt	version:	03.06.19_\(18\)	Trust: 1.0
vendor:	wago	model:	750-881	scope:	lt	version:	fw15	Trust: 1.0
vendor:	wago	model:	750-891	scope:	lt	version:	fw08	Trust: 1.0
vendor:	wago	model:	750-8216	scope:	lt	version:	03.06.19_\(18\)	Trust: 1.0
vendor:	wago	model:	750-862	scope:	lt	version:	fw08	Trust: 1.0
vendor:	wago	model:	750-8206	scope:	lt	version:	03.06.19_\(18\)	Trust: 1.0
vendor:	wago	model:	750-8211	scope:	lt	version:	03.06.19_\(18\)	Trust: 1.0
vendor:	wago	model:	750-8217	scope:	lt	version:	03.06.19_\(18\)	Trust: 1.0
vendor:	wago	model:	750-8212	scope:	lt	version:	03.06.19_\(18\)	Trust: 1.0
vendor:	wago	model:	750-882	scope:	lt	version:	fw15	Trust: 1.0
vendor:	wago	model:	750-889	scope:	lt	version:	fw15	Trust: 1.0
vendor:	wago	model:	750-880	scope:	lt	version:	fw16	Trust: 1.0
vendor:	wago	model:	750-829	scope:	lt	version:	fw15	Trust: 1.0
vendor:	codesys	model:	v2 web server	scope:	lt	version:	1.1.9.20	Trust: 1.0
vendor:	wago	model:	750-832	scope:	lt	version:	fw08	Trust: 1.0
vendor:	wago	model:	750-885	scope:	lt	version:	fw15	Trust: 1.0
vendor:	wago	model:	750-852	scope:	lt	version:	fw15	Trust: 1.0
vendor:	wago	model:	750-8214	scope:	lt	version:	03.06.19_\(18\)	Trust: 1.0
vendor:	wago	model:	750-823	scope:	lt	version:	fw08	Trust: 1.0
vendor:	wago	model:	750-893	scope:	lt	version:	fw08	Trust: 1.0
vendor:	wago	model:	750-8202	scope:	lt	version:	03.06.19_\(18\)	Trust: 1.0
vendor:	wago	model:	750-831	scope:	lt	version:	fw15	Trust: 1.0
vendor:	wago	model:	750-8210	scope:	lt	version:	03.06.19_\(18\)	Trust: 1.0
vendor:	wago	model:	750-8213	scope:	lt	version:	03.06.19_\(18\)	Trust: 1.0
vendor:	wago	model:	750-8207	scope:	lt	version:	03.06.19_\(18\)	Trust: 1.0
vendor:	wago	model:	750-890	scope:	lt	version:	fw08	Trust: 1.0
vendor:	wago	model:	750-8208	scope:	lt	version:	03.06.19_\(18\)	Trust: 1.0
vendor:	wago	model:	750-8203	scope:	lt	version:	03.06.19_\(18\)	Trust: 1.0
vendor:	3s smart	model:	codesys v2 web server	scope:	eq	version:	-	Trust: 0.8
vendor:	3s smart	model:	codesys v2 web server	scope:	eq	version:	1.1.9.20	Trust: 0.8

sources: JVNDB: JVNDB-2021-007169 // NVD: CVE-2021-30191

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2021-30191
value:	HIGH
Trust: 1.0
NVD:	CVE-2021-30191
value:	HIGH
Trust: 0.8
CNNVD:	CNNVD-202105-1626
value:	HIGH
Trust: 0.6
VULMON:	CVE-2021-30191
value:	MEDIUM
Trust: 0.1

nvd@nist.gov:	CVE-2021-30191
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: 1.9

nvd@nist.gov:	CVE-2021-30191
baseSeverity:	HIGH
baseScore:	7.5
vectorString:	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	3.9
impactScore:	3.6
version:	3.1
Trust: 1.0
NVD:	CVE-2021-30191
baseSeverity:	HIGH
baseScore:	7.5
vectorString:	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: VULMON: CVE-2021-30191 // JVNDB: JVNDB-2021-007169 // CNNVD: CNNVD-202105-1626 // NVD: CVE-2021-30191

PROBLEMTYPE DATA

problemtype:	CWE-120	Trust: 1.0
problemtype:	Classic buffer overflow (CWE-120) [NVD Evaluation ]	Trust: 0.8

sources: JVNDB: JVNDB-2021-007169 // NVD: CVE-2021-30191

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202105-1626

TYPE

other

Trust: 0.6

sources: CNNVD: CNNVD-202105-1626

PATCH

title:

Advisory 2021-07

url:

https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14726&token=553da5d11234bbe1ceed59969d419a71bb8c8747&download=

Trust: 0.8

sources: JVNDB: JVNDB-2021-007169

EXTERNAL IDS

db:	NVD	id:	CVE-2021-30191	Trust: 3.3
db:	JVN	id:	JVNVU97061687	Trust: 0.8
db:	ICS CERT	id:	ICSA-21-173-02	Trust: 0.8
db:	JVNDB	id:	JVNDB-2021-007169	Trust: 0.8
db:	CNNVD	id:	CNNVD-202105-1626	Trust: 0.6
db:	VULMON	id:	CVE-2021-30191	Trust: 0.1

sources: VULMON: CVE-2021-30191 // JVNDB: JVNDB-2021-007169 // CNNVD: CNNVD-202105-1626 // NVD: CVE-2021-30191

REFERENCES

url:	https://customers.codesys.com/index.php	Trust: 1.7
url:	https://customers.codesys.com/index.php?eid=dumpfile&t=f&f=14726&token=553da5d11234bbe1ceed59969d419a71bb8c8747&download=	Trust: 1.7
url:	https://nvd.nist.gov/vuln/detail/cve-2021-30191	Trust: 1.4
url:	https://jvn.jp/vu/jvnvu97061687/index.html	Trust: 0.8
url:	https://www.cisa.gov/uscert/ics/advisories/icsa-21-173-02	Trust: 0.8
url:	https://cwe.mitre.org/data/definitions/120.html	Trust: 0.1
url:	https://nvd.nist.gov	Trust: 0.1

sources: VULMON: CVE-2021-30191 // JVNDB: JVNDB-2021-007169 // CNNVD: CNNVD-202105-1626 // NVD: CVE-2021-30191

SOURCES

db:	VULMON	id:	CVE-2021-30191
db:	JVNDB	id:	JVNDB-2021-007169
db:	CNNVD	id:	CNNVD-202105-1626
db:	NVD	id:	CVE-2021-30191

LAST UPDATE DATE

2025-08-16T22:49:25.068000+00:00

SOURCES UPDATE DATE

db:	VULMON	id:	CVE-2021-30191	date:	2021-05-26T00:00:00
db:	JVNDB	id:	JVNDB-2021-007169	date:	2022-02-03T07:52:00
db:	CNNVD	id:	CNNVD-202105-1626	date:	2021-05-27T00:00:00
db:	NVD	id:	CVE-2021-30191	date:	2025-08-15T20:27:36.623

SOURCES RELEASE DATE

db:	VULMON	id:	CVE-2021-30191	date:	2021-05-25T00:00:00
db:	JVNDB	id:	JVNDB-2021-007169	date:	2022-02-03T00:00:00
db:	CNNVD	id:	CNNVD-202105-1626	date:	2021-05-25T00:00:00
db:	NVD	id:	CVE-2021-30191	date:	2021-05-25T13:15:17.807