Details of VAR-202110-1618

ID

VAR-202110-1618

CVE

CVE-2021-34585

TITLE

CODESYS V2 Unchecked Return Value Vulnerability in Web Servers

Trust: 0.8

sources: JVNDB: JVNDB-2021-014203

DESCRIPTION

In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests can trigger a parser error. Since the parser result is not checked under all conditions, a pointer dereference with an invalid address can occur. This leads to a denial of service situation. CODESYS V2 An unchecked return value vulnerability exists in web servers.Service operation interruption (DoS) It may be in a state

Trust: 1.62

sources: NVD: CVE-2021-34585 // JVNDB: JVNDB-2021-014203

AFFECTED PRODUCTS

vendor:	wago	model:	750-891	scope:	lt	version:	fw10	Trust: 1.0
vendor:	wago	model:	750-882	scope:	lt	version:	fw17	Trust: 1.0
vendor:	wago	model:	750-862	scope:	lt	version:	fw10	Trust: 1.0
vendor:	wago	model:	750-889	scope:	lt	version:	fw17	Trust: 1.0
vendor:	wago	model:	750-8202	scope:	lt	version:	fw20	Trust: 1.0
vendor:	wago	model:	750-8207	scope:	lt	version:	fw20	Trust: 1.0
vendor:	wago	model:	750-829	scope:	lt	version:	fw17	Trust: 1.0
vendor:	wago	model:	750-852	scope:	lt	version:	fw17	Trust: 1.0
vendor:	wago	model:	750-8210	scope:	lt	version:	fw20	Trust: 1.0
vendor:	wago	model:	750-8213	scope:	lt	version:	fw20	Trust: 1.0
vendor:	wago	model:	750-8208	scope:	lt	version:	fw20	Trust: 1.0
vendor:	wago	model:	750-8214	scope:	lt	version:	fw20	Trust: 1.0
vendor:	wago	model:	750-8203	scope:	lt	version:	fw20	Trust: 1.0
vendor:	wago	model:	750-885	scope:	lt	version:	fw17	Trust: 1.0
vendor:	wago	model:	750-831	scope:	lt	version:	fw17	Trust: 1.0
vendor:	wago	model:	750-8216	scope:	lt	version:	fw20	Trust: 1.0
vendor:	codesys	model:	codesys	scope:	lt	version:	1.1.9.22	Trust: 1.0
vendor:	wago	model:	750-8204	scope:	lt	version:	fw20	Trust: 1.0
vendor:	wago	model:	750-8211	scope:	lt	version:	fw20	Trust: 1.0
vendor:	wago	model:	750-8206	scope:	lt	version:	fw20	Trust: 1.0
vendor:	wago	model:	750-823	scope:	lt	version:	fw10	Trust: 1.0
vendor:	wago	model:	750-832	scope:	lt	version:	fw10	Trust: 1.0
vendor:	wago	model:	750-880	scope:	lt	version:	fw17	Trust: 1.0
vendor:	wago	model:	750-881	scope:	lt	version:	fw17	Trust: 1.0
vendor:	wago	model:	750-8217	scope:	lt	version:	fw20	Trust: 1.0
vendor:	wago	model:	750-8212	scope:	lt	version:	fw20	Trust: 1.0
vendor:	wago	model:	750-890	scope:	lt	version:	fw10	Trust: 1.0
vendor:	wago	model:	750-893	scope:	lt	version:	fw10	Trust: 1.0
vendor:	codesys	model:	codesys	scope:	eq	version:	-	Trust: 0.8
vendor:	codesys	model:	codesys	scope:	eq	version:	1.1.9.22	Trust: 0.8

sources: JVNDB: JVNDB-2021-014203 // NVD: CVE-2021-34585

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2021-34585
value:	HIGH
Trust: 1.0
info@cert.vde.com:	CVE-2021-34585
value:	HIGH
Trust: 1.0
NVD:	CVE-2021-34585
value:	HIGH
Trust: 0.8
CNNVD:	CNNVD-202110-1821
value:	HIGH
Trust: 0.6

nvd@nist.gov:	CVE-2021-34585
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: 1.8

nvd@nist.gov:	CVE-2021-34585
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: 2.0
OTHER:	JVNDB-2021-014203
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: JVNDB: JVNDB-2021-014203 // CNNVD: CNNVD-202110-1821 // NVD: CVE-2021-34585 // NVD: CVE-2021-34585

PROBLEMTYPE DATA

problemtype:	CWE-252	Trust: 1.0
problemtype:	Unchecked return value (CWE-252) [ others ]	Trust: 0.8

sources: JVNDB: JVNDB-2021-014203 // NVD: CVE-2021-34585

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202110-1821

TYPE

code problem

Trust: 0.6

sources: CNNVD: CNNVD-202110-1821

PATCH

title:	Advisory 2021-15	url:	https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16876&token=a3f1d937f95e7034879f4f2ea8e5a99b168256a7&download=	Trust: 0.8
title:	CODESYS Fixes for code issue vulnerabilities	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=167874	Trust: 0.6

sources: JVNDB: JVNDB-2021-014203 // CNNVD: CNNVD-202110-1821

EXTERNAL IDS

db:	NVD	id:	CVE-2021-34585	Trust: 3.2
db:	TENABLE	id:	TRA-2021-47	Trust: 2.4
db:	JVNDB	id:	JVNDB-2021-014203	Trust: 0.8
db:	CNNVD	id:	CNNVD-202110-1821	Trust: 0.6

sources: JVNDB: JVNDB-2021-014203 // CNNVD: CNNVD-202110-1821 // NVD: CVE-2021-34585

REFERENCES

url:	https://www.tenable.com/security/research/tra-2021-47	Trust: 2.4
url:	https://customers.codesys.com/index.php?eid=dumpfile&t=f&f=16876&token=a3f1d937f95e7034879f4f2ea8e5a99b168256a7&download=	Trust: 1.6
url:	https://nvd.nist.gov/vuln/detail/cve-2021-34585	Trust: 1.4

sources: JVNDB: JVNDB-2021-014203 // CNNVD: CNNVD-202110-1821 // NVD: CVE-2021-34585

SOURCES

db:	JVNDB	id:	JVNDB-2021-014203
db:	CNNVD	id:	CNNVD-202110-1821
db:	NVD	id:	CVE-2021-34585

LAST UPDATE DATE

2025-08-16T23:08:29.526000+00:00

SOURCES UPDATE DATE

db:	JVNDB	id:	JVNDB-2021-014203	date:	2022-10-07T07:48:00
db:	CNNVD	id:	CNNVD-202110-1821	date:	2021-11-18T00:00:00
db:	NVD	id:	CVE-2021-34585	date:	2025-08-15T20:26:31.073

SOURCES RELEASE DATE

db:	JVNDB	id:	JVNDB-2021-014203	date:	2022-10-07T00:00:00
db:	CNNVD	id:	CNNVD-202110-1821	date:	2021-10-26T00:00:00
db:	NVD	id:	CVE-2021-34585	date:	2021-10-26T10:15:07.907