Details of VAR-201805-1131

ID

VAR-201805-1131

CVE

CVE-2018-4850

TITLE

SIEMENS SIMATIC S7-400 CPU and SIMATIC S7-400H CPU Vulnerable to data processing

Trust: 0.8

sources: JVNDB: JVNDB-2018-005158

DESCRIPTION

A vulnerability has been identified in SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below (All versions), SIMATIC S7-400 (incl. F) CPU hardware version 5.0 (All firmware versions < V5.2), SIMATIC S7-400H CPU hardware version 4.5 and below (All versions). The affected CPUs improperly validate S7 communication packets which could cause a Denial-of-Service condition of the CPU. The CPU will remain in DEFECT mode until manual restart. SIEMENS SIMATIC S7-400 CPU and SIMATIC S7-400H CPU Contains a data processing vulnerability.Service operation interruption (DoS) There is a possibility of being put into a state. The products in the Siemens SIMATIC S7-400 CPU family have been designed for process control in industrial environments. There is a denial of service vulnerability in the Siemens SIMATIC S7-400. Remote attackers may exploit this issue to cause denial-of-service conditions, denying service to legitimate users. F) and SIMATIC S7-400H CPU. The vulnerability is caused by the fact that the program does not correctly verify the S7 communication data package. The following products and versions are affected: Siemens SIMATIC S7-400 4.0 and earlier, SIMATIC S7-400 (incl

Trust: 2.7

sources: NVD: CVE-2018-4850 // JVNDB: JVNDB-2018-005158 // CNVD: CNVD-2018-09542 // BID: 104217 // IVD: e2ef386e-39ab-11e9-afb5-000c29342cb1 // VULHUB: VHN-134881

IOT TAXONOMY

category:

['ICS']

sub_category:

Trust: 0.8

sources: IVD: e2ef386e-39ab-11e9-afb5-000c29342cb1 // CNVD: CNVD-2018-09542

AFFECTED PRODUCTS

vendor:	siemens	model:	simatic s7-400	scope:	lt	version:	5.2	Trust: 1.0
vendor:	siemens	model:	simatic s7-400	scope:	lte	version:	4.0	Trust: 1.0
vendor:	siemens	model:	simatic s7-400h	scope:	lte	version:	4.5	Trust: 1.0
vendor:	siemens	model:	simatic s7-400	scope:	-	version:	-	Trust: 0.8
vendor:	siemens	model:	simatic s7-400h	scope:	-	version:	-	Trust: 0.8
vendor:	siemens	model:	simatic s7-400 cpu hardware	scope:	lte	version:	<=4.0	Trust: 0.6
vendor:	siemens	model:	simatic s7-400 cpu hardware	scope:	lte	version:	<=5.0	Trust: 0.6
vendor:	siemens	model:	simatic s7-400h cpu hardware	scope:	lte	version:	<=4.5	Trust: 0.6
vendor:	siemens	model:	simatic s7-400h	scope:	eq	version:	4.5	Trust: 0.6
vendor:	siemens	model:	simatic s7-400	scope:	eq	version:	4.0	Trust: 0.6
vendor:	simatic s7 400	model:	-	scope:	eq	version:	*	Trust: 0.4
vendor:	siemens	model:	simatic s7-400h cpu	scope:	eq	version:	0	Trust: 0.3
vendor:	siemens	model:	simatic s7-400 cpu	scope:	eq	version:	5.0	Trust: 0.3
vendor:	siemens	model:	simatic s7-400 cpu	scope:	eq	version:	4.0	Trust: 0.3
vendor:	siemens	model:	simatic s7-400h cpu	scope:	ne	version:	4.5	Trust: 0.3
vendor:	siemens	model:	simatic s7-400 cpu	scope:	ne	version:	5.2	Trust: 0.3
vendor:	simatic s7 400h	model:	-	scope:	eq	version:	*	Trust: 0.2

sources: IVD: e2ef386e-39ab-11e9-afb5-000c29342cb1 // CNVD: CNVD-2018-09542 // BID: 104217 // JVNDB: JVNDB-2018-005158 // CNNVD: CNNVD-201805-471 // NVD: CVE-2018-4850

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2018-4850
value:	HIGH
Trust: 1.0
NVD:	CVE-2018-4850
value:	HIGH
Trust: 0.8
CNVD:	CNVD-2018-09542
value:	HIGH
Trust: 0.6
CNNVD:	CNNVD-201805-471
value:	HIGH
Trust: 0.6
IVD:	e2ef386e-39ab-11e9-afb5-000c29342cb1
value:	HIGH
Trust: 0.2
VULHUB:	VHN-134881
value:	MEDIUM
Trust: 0.1

nvd@nist.gov:	CVE-2018-4850
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
CNVD:	CNVD-2018-09542
severity:	HIGH
baseScore:	7.8
vectorString:	AV:N/AC:L/AU:N/C:N/I:N/A:C
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	COMPLETE
exploitabilityScore:	10.0
impactScore:	6.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.6
IVD:	e2ef386e-39ab-11e9-afb5-000c29342cb1
severity:	HIGH
baseScore:	7.8
vectorString:	AV:N/AC:L/AU:N/C:N/I:N/A:C
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	COMPLETE
exploitabilityScore:	10.0
impactScore:	6.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.9 [IVD]
Trust: 0.2
VULHUB:	VHN-134881
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: 0.1

nvd@nist.gov:	CVE-2018-4850
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:	3.9
impactScore:	3.6
version:	3.0
Trust: 1.8

sources: IVD: e2ef386e-39ab-11e9-afb5-000c29342cb1 // CNVD: CNVD-2018-09542 // VULHUB: VHN-134881 // JVNDB: JVNDB-2018-005158 // CNNVD: CNNVD-201805-471 // NVD: CVE-2018-4850

PROBLEMTYPE DATA

problemtype:	CWE-20	Trust: 1.0
problemtype:	NVD-CWE-noinfo	Trust: 1.0
problemtype:	CWE-19	Trust: 0.9

sources: VULHUB: VHN-134881 // JVNDB: JVNDB-2018-005158 // NVD: CVE-2018-4850

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-201805-471

TYPE

lack of information

Trust: 0.6

sources: CNNVD: CNNVD-201805-471

CONFIGURATIONS

sources: JVNDB: JVNDB-2018-005158

PATCH

title:	Siemens ProductCERT and Siemens CERT	url:	https://www.siemens.com/global/en/home/products/services/cert.html#SecurityPublications	Trust: 0.8
title:	SSA-914382 : Denial-of-Service Vulnerability in SIMATIC S7-400	url:	https://cert-portal.siemens.com/productcert/pdf/ssa-914382.pdf	Trust: 0.8
title:	Siemens SIMATIC S7-400 refuses service patch	url:	https://www.cnvd.org.cn/patchInfo/show/129167	Trust: 0.6
title:	Siemens SIMATIC S7-400 and SIMATIC S7-400H Security vulnerabilities	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=83420	Trust: 0.6

sources: CNVD: CNVD-2018-09542 // JVNDB: JVNDB-2018-005158 // CNNVD: CNNVD-201805-471

EXTERNAL IDS

db:	NVD	id:	CVE-2018-4850	Trust: 3.6
db:	SIEMENS	id:	SSA-914382	Trust: 2.3
db:	BID	id:	104217	Trust: 2.0
db:	ICS CERT	id:	ICSA-18-137-03	Trust: 1.1
db:	CNVD	id:	CNVD-2018-09542	Trust: 0.8
db:	CNNVD	id:	CNNVD-201805-471	Trust: 0.8
db:	JVNDB	id:	JVNDB-2018-005158	Trust: 0.8
db:	IVD	id:	E2EF386E-39AB-11E9-AFB5-000C29342CB1	Trust: 0.2
db:	SEEBUG	id:	SSVID-98957	Trust: 0.1
db:	VULHUB	id:	VHN-134881	Trust: 0.1

sources: IVD: e2ef386e-39ab-11e9-afb5-000c29342cb1 // CNVD: CNVD-2018-09542 // VULHUB: VHN-134881 // BID: 104217 // JVNDB: JVNDB-2018-005158 // CNNVD: CNNVD-201805-471 // NVD: CVE-2018-4850

REFERENCES

url:	https://cert-portal.siemens.com/productcert/pdf/ssa-914382.pdf	Trust: 2.3
url:	http://www.securityfocus.com/bid/104217	Trust: 1.7
url:	https://www.siemens.com/global/en/home/products/services/cert.html#securitypublications	Trust: 1.7
url:	https://ics-cert.us-cert.gov/advisories/icsa-18-137-03	Trust: 1.1
url:	https://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2018-4850	Trust: 0.8
url:	https://nvd.nist.gov/vuln/detail/cve-2018-4850	Trust: 0.8
url:	http://www.siemens.com/	Trust: 0.3

sources: CNVD: CNVD-2018-09542 // VULHUB: VHN-134881 // BID: 104217 // JVNDB: JVNDB-2018-005158 // CNNVD: CNNVD-201805-471 // NVD: CVE-2018-4850

CREDITS

The vendor reported this issue.

Trust: 0.3

sources: BID: 104217

SOURCES

db:	IVD	id:	e2ef386e-39ab-11e9-afb5-000c29342cb1
db:	CNVD	id:	CNVD-2018-09542
db:	VULHUB	id:	VHN-134881
db:	BID	id:	104217
db:	JVNDB	id:	JVNDB-2018-005158
db:	CNNVD	id:	CNNVD-201805-471
db:	NVD	id:	CVE-2018-4850

LAST UPDATE DATE

2024-11-23T22:00:30.643000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2018-09542	date:	2018-05-16T00:00:00
db:	VULHUB	id:	VHN-134881	date:	2019-10-09T00:00:00
db:	BID	id:	104217	date:	2018-05-15T00:00:00
db:	JVNDB	id:	JVNDB-2018-005158	date:	2018-07-09T00:00:00
db:	CNNVD	id:	CNNVD-201805-471	date:	2019-10-17T00:00:00
db:	NVD	id:	CVE-2018-4850	date:	2024-11-21T04:07:35.003

SOURCES RELEASE DATE

db:	IVD	id:	e2ef386e-39ab-11e9-afb5-000c29342cb1	date:	2018-05-16T00:00:00
db:	CNVD	id:	CNVD-2018-09542	date:	2018-05-16T00:00:00
db:	VULHUB	id:	VHN-134881	date:	2018-05-16T00:00:00
db:	BID	id:	104217	date:	2018-05-15T00:00:00
db:	JVNDB	id:	JVNDB-2018-005158	date:	2018-07-09T00:00:00
db:	CNNVD	id:	CNNVD-201805-471	date:	2018-05-17T00:00:00
db:	NVD	id:	CVE-2018-4850	date:	2018-05-16T17:29:00.387