7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
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
0.002 Low
EPSS
Percentile
61.9%
**ATTENTION:**Remotely exploitable/low skill level to exploit.
Vendor: Moxa
Equipment: OnCell
Vulnerabilities: Improper Restriction of Excessive Authentication Attempts, Plaintext Storage of a Password, and Cross-Site Request Forgery
The following versions of OnCell, a high-speed industrial-grade IP gateway, are affected:
Successful exploitation of these vulnerabilities may allow an attacker to use brute force to determine parameters needed to access the application. An attacker may also obtain credentials by obtaining files that store passwords in clear text.
Moxa recommends the following mitigations:
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
ICS-CERT 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 in the ICSβCERT Technical Information Paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT web site.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to ICS-CERT for tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
An attacker can freely use brute force to determine parameters needed to bypass authentication.
CVE-2017-7915 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
The applicationβs configuration file contains parameters that represent passwords in plaintext.
CVE-2017-7913 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).
The application does not sufficiently verify if a request was intentionally provided by the user who submitted the request, which could allow an attacker to modify the configuration of the device.
CVE-2017-7917 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Independent researcher Maxim Rupp identified the vulnerabilities.
Critical Infrastructure Sectors: Commercial Facilities, Critical Manufacturing, Energy, Transportation Systems
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Taiwan
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-7913
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-7915
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-7917
cwe.mitre.org/data/definitions/256.html
cwe.mitre.org/data/definitions/307.html
cwe.mitre.org/data/definitions/352.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Moxa%20OnCell+https://www.cisa.gov/news-events/ics-advisories/icsa-17-143-01
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www.dhs.gov/foia
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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
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
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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www.usa.gov/
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www.youtube.com/@cisagov
mailto:?subject=Moxa%20OnCell&body=www.cisa.gov/news-events/ics-advisories/icsa-17-143-01
7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
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
0.002 Low
EPSS
Percentile
61.9%