9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10 High
AI Score
Confidence
High
7.5 High
CVSS2
Access Vector
Access Complexity
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.002 Low
EPSS
Percentile
60.7%
CVSS v3 9.8
ATTENTION: Exploitable remotely/low skill level to exploit
Vendor: Advantech
Equipment: WebAccess/SCADA
Vulnerabilities: Improper Authentication, Authentication Bypass, SQL Injection
Successful exploitation of these vulnerabilities may allow an attacker to access and manipulate sensitive data.
The following versions of WebAccess/SCADA, a SCADA software platform, are affected:
An improper authentication vulnerability exists that could allow a possible authentication bypass allowing an attacker to upload malicious data.
CVE-2019-6519 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Specially crafted requests could allow a possible authentication bypass that could allow an attacker to obtain and manipulate sensitive information.
CVE-2019-6521 has been assigned to this vulnerability. A CVSS v3 base score of 8.6 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L).
The software does not properly sanitize its inputs for SQL commands.
CVE-2019-6523 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).
Devesh Logendran of Attila Cybertech Pte. Ltd. reported these vulnerabilities to NCCIC.
Advantech has released Version 8.3.5 of WebAccess/SCADA to address the reported vulnerabilities. Users can download the latest version of WebAccess/SCADA at the following location (registration required):
https://support.advantech.com/support/DownloadSRDetail_New.aspx?SR_ID=1-MS9MJV&Doc_Source=Download
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 these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-6519
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-6521
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-6523
cwe.mitre.org/data/definitions/287.html
cwe.mitre.org/data/definitions/288.html
cwe.mitre.org/data/definitions/89.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Advantech%20WebAccess/SCADA+https://www.cisa.gov/news-events/ics-advisories/icsa-19-024-01
urldefense.proofpoint.com/v2/url?u=https-3A__support.advantech.com_support_DownloadSRDetail-5FNew.aspx-3FSR-5FID-3D1-2DMS9MJV-26Doc-5FSource-3DDownload&d=DwMFAg&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=bd4G77mdhJayq8hCsaGH3eJ3oTDOURCwn88GATyKPJM&m=uVDoRgrHhHX88anG8A3hRN3SSzs20a5SSAUK4W6QE3g&s=ZzwMLJynAk12jVrLdGX63bHJkGeSBNQZR9c8S5tNViY&e=
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10 High
AI Score
Confidence
High
7.5 High
CVSS2
Access Vector
Access Complexity
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.002 Low
EPSS
Percentile
60.7%