Details of VAR-201806-1814

ID

VAR-201806-1814

TITLE

Advantech WebAccess 'nvA1Media.ocx' Stack Buffer Overflow Vulnerability

Trust: 1.1

sources: IVD: e2f37e31-39ab-11e9-b9f2-000c29342cb1 // CNVD: CNVD-2018-11442 // BID: 100221

DESCRIPTION

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Advantech WebAccess. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.The specific flaw exists within nvA1Media.ocx. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute arbitrary code under the context of the process. Advantech WebAccess is a suite of browser-based HMI/SCADA software from Advantech. The software supports dynamic graphical display and real-time data control, and provides the ability to remotely control and manage automation equipment. A stack buffer overflow vulnerability exists in Advantech WebAccess 'nvA1Media.ocx'. Failed exploit attempts will likely cause a denial-of-service condition

Trust: 1.62

sources: ZDI: ZDI-17-525 // CNVD: CNVD-2018-11442 // BID: 100221 // IVD: e2f37e31-39ab-11e9-b9f2-000c29342cb1

IOT TAXONOMY

category:

['ICS']

sub_category:

Trust: 0.8

sources: IVD: e2f37e31-39ab-11e9-b9f2-000c29342cb1 // CNVD: CNVD-2018-11442

AFFECTED PRODUCTS

vendor:	advantech	model:	webaccess	scope:	eq	version:	0	Trust: 1.1
vendor:	advantech	model:	webaccess	scope:	-	version:	-	Trust: 0.7

sources: IVD: e2f37e31-39ab-11e9-b9f2-000c29342cb1 // ZDI: ZDI-17-525 // CNVD: CNVD-2018-11442 // BID: 100221

CVSS

SEVERITY

CVSSV2

CVSSV3

ZDI:	ZDI-17-525
value:	HIGH
Trust: 0.7
CNVD:	CNVD-2018-11442
value:	HIGH
Trust: 0.6
IVD:	e2f37e31-39ab-11e9-b9f2-000c29342cb1
value:	HIGH
Trust: 0.2

ZDI:	ZDI-17-525
severity:	HIGH
baseScore:	7.5
vectorString:	AV:N/AC:L/AU:N/C:P/I:P/A:P
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	PARTIAL
exploitabilityScore:	10.0
impactScore:	6.4
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.7
CNVD:	CNVD-2018-11442
severity:	HIGH
baseScore:	7.5
vectorString:	AV:N/AC:L/AU:N/C:P/I:P/A:P
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	PARTIAL
exploitabilityScore:	10.0
impactScore:	6.4
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.6
IVD:	e2f37e31-39ab-11e9-b9f2-000c29342cb1
severity:	HIGH
baseScore:	7.5
vectorString:	AV:N/AC:L/AU:N/C:P/I:P/A:P
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	PARTIAL
exploitabilityScore:	10.0
impactScore:	6.4
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.9 [IVD]
Trust: 0.2

sources: IVD: e2f37e31-39ab-11e9-b9f2-000c29342cb1 // ZDI: ZDI-17-525 // CNVD: CNVD-2018-11442

THREAT TYPE

network

Trust: 0.3

sources: BID: 100221

TYPE

Boundary Condition Error

Trust: 0.3

sources: BID: 100221

PATCH

title:

This vulnerability is being disclosed publicly without a patch in accordance with the ZDI 120 day deadline.11/08/2016, 11/09/2016, 11/10/2016 and 11/15/2016 - ZDI disclosed the reports, 44 in all, to ICS-CERT11/09/2016 - The vendor acknowledged receipt of the report through ICS-CERT and ICS-CERT provided ICS-VU-71410304/27/2017 - ICS-CERT notified ZDI these might be fixed in the latest version and asked would ZDI re-test05/03/2017 - ZDI replied that we cannot do the testing for AdvantechICS-CERT did not respond06/23/2017 - ZDI wrote to ICS-CERT requesting any available update07/31/2017 - ZDI wrote to ICS-CERT requesting any available update08/01/2017 - ZDI wrote to ICS-CERT advising of the intent to 0-day-- Mitigation:Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the service to trusted machines. Only the clients and servers that have a legitimate procedural relationship with the service should be permitted to communicate with it. This could be accomplished in a number of ways, most notably with firewall rules/whitelisting. These features are available in the native Windows Firewall, as described in and numerous other Microsoft Knowledge Base articles.

url:

http://technet.microsoft.com/en-us/library/cc725770%28ws.10%29.aspx

Trust: 0.7

sources: ZDI: ZDI-17-525

EXTERNAL IDS

db:	ZDI	id:	ZDI-17-525	Trust: 1.6
db:	BID	id:	100221	Trust: 0.9
db:	CNVD	id:	CNVD-2018-11442	Trust: 0.8
db:	ZDI_CAN	id:	ZDI-CAN-4101	Trust: 0.7
db:	IVD	id:	E2F37E31-39AB-11E9-B9F2-000C29342CB1	Trust: 0.2

sources: IVD: e2f37e31-39ab-11e9-b9f2-000c29342cb1 // ZDI: ZDI-17-525 // CNVD: CNVD-2018-11442 // BID: 100221

REFERENCES

url:	https://www.zerodayinitiative.com/advisories/zdi-17-525/	Trust: 0.9
url:	http://technet.microsoft.com/en-us/library/cc725770%28ws.10%29.aspx	Trust: 0.7
url:	http://www.securityfocus.com/bid/100221	Trust: 0.6
url:	http://webaccess.advantech.com	Trust: 0.3

sources: ZDI: ZDI-17-525 // CNVD: CNVD-2018-11442 // BID: 100221

CREDITS

Anonymous

Trust: 0.7

sources: ZDI: ZDI-17-525

SOURCES

db:	IVD	id:	e2f37e31-39ab-11e9-b9f2-000c29342cb1
db:	ZDI	id:	ZDI-17-525
db:	CNVD	id:	CNVD-2018-11442
db:	BID	id:	100221

LAST UPDATE DATE

2022-05-17T01:52:35.298000+00:00

SOURCES UPDATE DATE

db:	ZDI	id:	ZDI-17-525	date:	2017-08-07T00:00:00
db:	CNVD	id:	CNVD-2018-11442	date:	2018-06-13T00:00:00
db:	BID	id:	100221	date:	2017-08-07T00:00:00

SOURCES RELEASE DATE

db:	IVD	id:	e2f37e31-39ab-11e9-b9f2-000c29342cb1	date:	2018-06-13T00:00:00
db:	ZDI	id:	ZDI-17-525	date:	2017-08-07T00:00:00
db:	CNVD	id:	CNVD-2018-11442	date:	2018-06-13T00:00:00
db:	BID	id:	100221	date:	2017-08-07T00:00:00