Details of VAR-202111-1610

ID

VAR-202111-1610

CVE

CVE-2021-31881

TITLE

Siemens Nucleus ReadyStart Buffer error vulnerability

Trust: 0.6

sources: CNNVD: CNNVD-202111-849

DESCRIPTION

A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303). When processing a DHCP OFFER message, the DHCP client application does not validate the length of the Vendor option(s), leading to Denial-of-Service conditions. (FSMD-2021-0008)

Trust: 1.0

sources: NVD: CVE-2021-31881

AFFECTED PRODUCTS

vendor:	siemens	model:	nucleus readystart v3	scope:	lt	version:	2012.08	Trust: 1.0
vendor:	siemens	model:	apogee modular building controller	scope:	eq	version:	*	Trust: 1.0
vendor:	siemens	model:	talon tc compact	scope:	eq	version:	*	Trust: 1.0
vendor:	siemens	model:	apogee pxc compact	scope:	eq	version:	*	Trust: 1.0
vendor:	siemens	model:	nucleus net	scope:	eq	version:	*	Trust: 1.0
vendor:	siemens	model:	nucleus source code	scope:	eq	version:	*	Trust: 1.0
vendor:	siemens	model:	apogee pxc modular	scope:	eq	version:	*	Trust: 1.0
vendor:	siemens	model:	talon tc modular	scope:	eq	version:	*	Trust: 1.0
vendor:	siemens	model:	capital vstar	scope:	eq	version:	*	Trust: 1.0
vendor:	siemens	model:	apogee modular equiment controller	scope:	eq	version:	*	Trust: 1.0

sources: NVD: CVE-2021-31881

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2021-31881
value:	HIGH
Trust: 1.0
productcert@siemens.com:	CVE-2021-31881
value:	HIGH
Trust: 1.0
CNNVD:	CNNVD-202111-849
value:	HIGH
Trust: 0.6

nvd@nist.gov:	CVE-2021-31881
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

nvd@nist.gov:	CVE-2021-31881
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
productcert@siemens.com:	CVE-2021-31881
baseSeverity:	HIGH
baseScore:	7.1
vectorString:	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
attackVector:	ADJACENT
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	LOW
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	2.8
impactScore:	4.2
version:	3.1
Trust: 1.0

sources: CNNVD: CNNVD-202111-849 // NVD: CVE-2021-31881 // NVD: CVE-2021-31881

PROBLEMTYPE DATA

problemtype:

CWE-125

Trust: 1.0

sources: NVD: CVE-2021-31881

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202111-849

TYPE

buffer error

Trust: 0.6

sources: CNNVD: CNNVD-202111-849

PATCH

title:

Siemens Nucleus ReadyStart Buffer error vulnerability fix

url:

http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=174356

Trust: 0.6

sources: CNNVD: CNNVD-202111-849

EXTERNAL IDS

db:	SIEMENS	id:	SSA-114589	Trust: 1.6
db:	SIEMENS	id:	SSA-620288	Trust: 1.6
db:	SIEMENS	id:	SSA-044112	Trust: 1.6
db:	NVD	id:	CVE-2021-31881	Trust: 1.6
db:	ICS CERT	id:	ICSA-21-350-06	Trust: 0.6
db:	ICS CERT	id:	ICSA-21-313-03	Trust: 0.6
db:	ICS CERT	id:	ICSA-21-315-07	Trust: 0.6
db:	AUSCERT	id:	ESB-2021.3874	Trust: 0.6
db:	AUSCERT	id:	ESB-2021.4289	Trust: 0.6
db:	AUSCERT	id:	ESB-2021.3833	Trust: 0.6
db:	CS-HELP	id:	SB2021111003	Trust: 0.6
db:	CS-HELP	id:	SB2021121648	Trust: 0.6
db:	CNNVD	id:	CNNVD-202111-849	Trust: 0.6

sources: CNNVD: CNNVD-202111-849 // NVD: CVE-2021-31881

REFERENCES

url:	https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf	Trust: 1.6
url:	https://cert-portal.siemens.com/productcert/pdf/ssa-114589.pdf	Trust: 1.6
url:	https://cert-portal.siemens.com/productcert/pdf/ssa-620288.pdf	Trust: 1.6
url:	https://cert-portal.siemens.com/productcert/html/ssa-044112.html	Trust: 1.0
url:	https://cert-portal.siemens.com/productcert/html/ssa-114589.html	Trust: 1.0
url:	https://cert-portal.siemens.com/productcert/html/ssa-620288.html	Trust: 1.0
url:	https://www.cybersecurity-help.cz/vdb/sb2021111003	Trust: 0.6
url:	https://www.auscert.org.au/bulletins/esb-2021.3874	Trust: 0.6
url:	https://nvd.nist.gov/vuln/detail/cve-2021-31881	Trust: 0.6
url:	https://www.auscert.org.au/bulletins/esb-2021.4289	Trust: 0.6
url:	https://www.cybersecurity-help.cz/vdb/sb2021121648	Trust: 0.6
url:	https://www.auscert.org.au/bulletins/esb-2021.3833	Trust: 0.6
url:	https://us-cert.cisa.gov/ics/advisories/icsa-21-315-07	Trust: 0.6
url:	https://us-cert.cisa.gov/ics/advisories/icsa-21-350-06	Trust: 0.6
url:	https://us-cert.cisa.gov/ics/advisories/icsa-21-313-03	Trust: 0.6

sources: CNNVD: CNNVD-202111-849 // NVD: CVE-2021-31881

CREDITS

Siemens reported these vulnerabilities to CISA.

Trust: 0.6

sources: CNNVD: CNNVD-202111-849

SOURCES

db:	CNNVD	id:	CNNVD-202111-849
db:	NVD	id:	CVE-2021-31881

LAST UPDATE DATE

2024-10-08T21:14:25.166000+00:00

SOURCES UPDATE DATE

db:	CNNVD	id:	CNNVD-202111-849	date:	2022-05-23T00:00:00
db:	NVD	id:	CVE-2021-31881	date:	2024-10-08T09:15:04.740

SOURCES RELEASE DATE

db:	CNNVD	id:	CNNVD-202111-849	date:	2021-11-09T00:00:00
db:	NVD	id:	CVE-2021-31881	date:	2021-11-09T12:15:09.257