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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.9 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
0.104 Low
EPSS
Percentile
95.0%
Successful exploitation of these vulnerabilities may allow information disclosure, remote code execution, and compromise system availability.
The following versions of WebAccess Node, an HMI platform, are affected:
An improper validation vulnerability exists that could allow an attacker to inject specially crafted input into memory where it can be executed.
CVE-2020-12022 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).
Multiple relative path traversal vulnerabilities exist that may allow an authenticated user to use a specially crafted file to delete files outside the application’s control.
CVE-2020-12010 has been assigned to this vulnerability. A CVSS v3 base score of 6.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:H).
Multiple relative path traversal vulnerabilities exist that may allow an attacker to overwrite files outside the application’s control.
CVE-2020-12006 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Multiple relative path traversal vulnerabilities exist that may allow a low privilege user to overwrite files outside the application’s control.
CVE-2020-12026 has been assigned to this vulnerability. A CVSS v3 base score of 8.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).
Input is not properly sanitized and may allow an attacker to inject SQL commands.
CVE-2020-12014 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
Multiple stack-based buffer overflow vulnerabilities exist caused by a lack of proper validation of the length of user-supplied data, which may allow remote code execution.
CVE-2020-12002 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).
Multiple heap-based buffer overflow vulnerabilities exist caused by a lack of proper validation of the length of user-supplied data, which may allow remote code execution.
CVE-2020-10638 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).
An out-of-bounds vulnerability exists that may allow access to unauthorized data.
CVE-2020-12018 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).
Natnael Samson and Z0mb1E, working with Trend Micro’s Zero Day Initiative, reported these vulnerabilities to CISA.
Advantech has released WebAccessNode Version 8.4.4.P0320844 to address the reported vulnerabilities for users currently using WebAccessNode Version 8.4.4
Advantech has released WebAccessNode Version 9.0.0.P0320900 to address the reported vulnerabilities for users currently using WebAccessNode Version 9.0.0
Note: Upon installation, there is a step to let the user decide whether to define a password code for RPC calls. If the user leaves this blank, the installation will pop up a warning to the user for potential risks that they are willing to take.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.gov. 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 webpage on us-cert.gov 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 CISA for tracking and correlation against other incidents.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
No known public exploits specifically target these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-10638
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12002
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12006
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12010
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12014
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12018
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12022
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12026
cwe.mitre.org/data/definitions/121.html
cwe.mitre.org/data/definitions/122.html
cwe.mitre.org/data/definitions/125.html
cwe.mitre.org/data/definitions/129.html
cwe.mitre.org/data/definitions/23.html
cwe.mitre.org/data/definitions/23.html
cwe.mitre.org/data/definitions/23.html
cwe.mitre.org/data/definitions/89.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
support.advantech.com/support/DownloadSRDetail_New.aspx?SR_ID=1-MS9MJV&Doc_Source=Download
support.advantech.com/support/DownloadSRDetail_New.aspx?SR_ID=1-MS9MJV&Doc_Source=Download
twitter.com/CISAgov
twitter.com/intent/tweet?text=Advantech%20WebAccess%20Node+https://www.cisa.gov/news-events/ics-advisories/icsa-20-128-01
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
www.facebook.com/sharer/sharer.php?u=https://www.cisa.gov/news-events/ics-advisories/icsa-20-128-01&title=Advantech%20WebAccess%20Node
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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www.us-cert.gov/ics
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www.us-cert.gov/ics/alerts/ICS-ALERT-10-301-01
www.us-cert.gov/ics/recommended-practices
www.us-cert.gov/ics/tips/ICS-TIP-12-146-01B
www.us-cert.gov/ncas/tips/ST04-014
www.us-cert.gov/sites/default/files/publications/emailscams_0905.pdf
www.us-cert.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Advantech%20WebAccess%20Node&body=www.cisa.gov/news-events/ics-advisories/icsa-20-128-01
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.9 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
0.104 Low
EPSS
Percentile
95.0%