CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
52.1%
CVSS v3 6.5
**ATTENTION:**Low skill level to exploit
**Vendor:**AVEVA
Equipment: InduSoft Web Studio, InTouch Edge HMI
Vulnerability: Uncontrolled Search Path Element
Successful exploitation of this vulnerability could allow execution of unauthorized code or commands.
The following versions of AVEVA InduSoft Web Studio and InTouch Edge HMI are affected by a vulnerability in a third-party component, Gemalto Sentinel UltraPro encryption keys.
3.2.1 UNCONTROLLED SEARCH PATH ELEMENT CWE-427
The uncontrolled search path element vulnerability allows an attacker to load and execute a malicious file from the ux32w.dll in third-party component Sentinel UltraPro.
CVE-2019-6534 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H).
ADLab of Venustech reported this vulnerability to NCCIC.
AVEVA recommends that users upgrade to the latest versions located the following links:
InduSoft Web Studio v8.1 SP3
<http://download.indusoft.com/81.3.0/IWS81.3.0.zip>
InTouch Edge HMI 2017 Update 3
<https://softwaresupportsp.schneider-electric.com/#/producthub/details?id=52354> (login required)
Users who are unable to upgrade to the latest version of InduSoft Web Studio or InTouch Edge HMI, can alternatively apply Security Update LFSec131:
<http://www.indusoft.com/download/patches/security/LFSec131.zip>
<https://softwaresupportsp.schneider-electric.com/#/producthub/details?id=52410> (login required)
For addition information please see AVEVA Security Bulletin LFSEC00000131:
<https://sw.aveva.com/hubfs/assets-2018/pdf/security-bulletin/SecurityBulletin_LFSec131.pdf>
NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available on the ICS-CERT website in the Technical Information Paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability. This vulnerability is not exploitable remotely.
download.indusoft.com/81.3.0/IWS81.3.0.zip
www.indusoft.com/download/patches/security/LFSec131.zip
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-19-078-01
cwe.mitre.org/data/definitions/427.html
nvd.nist.gov/vuln/detail/CVE-2019-6534
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
softwaresupportsp.schneider-electric.com/#/producthub/details?id=52354
softwaresupportsp.schneider-electric.com/#/producthub/details?id=52410
sw.aveva.com/hubfs/assets-2018/pdf/security-bulletin/SecurityBulletin_LFSec131.pdf
twitter.com/CISAgov
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
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CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
52.1%