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 APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All versions), APOGEE MEC (PPC) (P2 Ethernet) (All versions), APOGEE PXC Compact (BACnet) (All versions < V3.5.4), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.19), APOGEE PXC Modular (BACnet) (All versions < V3.5.4), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.19), Capital VSTAR (All versions with enabled Ethernet options), Desigo PXC00-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC00-U (All versions >= V2.3 and < V6.30.016), Desigo PXC001-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC100-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC12-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC128-U (All versions >= V2.3 and < V6.30.016), Desigo PXC200-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC36.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC50-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC64-U (All versions >= V2.3 and < V6.30.016), Desigo PXM20-E (All versions >= V2.3 and < V6.30.016), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus Source Code (All versions), TALON TC Compact (BACnet) (All versions < V3.5.4), TALON TC Modular (BACnet) (All versions < V3.5.4). 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:	capital vstar	scope:	eq	version:	*	Trust: 1.0
vendor:	siemens	model:	apogee pxc compact	scope:	eq	version:	*	Trust: 1.0
vendor:	siemens	model:	nucleus source code	scope:	eq	version:	*	Trust: 1.0
vendor:	siemens	model:	talon tc compact	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:	nucleus readystart v3	scope:	lt	version:	2012.08	Trust: 1.0
vendor:	siemens	model:	nucleus net	scope:	eq	version:	*	Trust: 1.0
vendor:	siemens	model:	apogee modular equiment controller	scope:	eq	version:	*	Trust: 1.0
vendor:	siemens	model:	apogee modular building 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
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

sources: CNNVD: CNNVD-202111-849 // 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://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

2024-08-14T12:45:30.613000+00:00

SOURCES UPDATE DATE

db:	CNNVD	id:	CNNVD-202111-849	date:	2022-05-23T00:00:00
db:	NVD	id:	CVE-2021-31881	date:	2022-05-20T13:15:12.327

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