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AUSCERT External Security Bulletin Redistribution
ESB-2020.4086
Advisory (icsa-20-324-02) Paradox IP150
18 November 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Paradox IP150
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Mitigation
CVE Names: CVE-2020-25189 CVE-2020-25185
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-20-324-02
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ICS Advisory (ICSA-20-324-02)
Paradox IP150
Original release date: November 17, 2020
Legal Notice
All information products included in https://us-cert.cisa.gov/ics are
provided"as is" for informational purposes only. The Department of Homeland
Security (DHS) does not provide any warranties of any kind regarding any
information contained within. DHS does not endorse any commercial product or
service, referenced in this product or otherwise. Further dissemination of this
product is governed by the Traffic Light Protocol (TLP) marking in the header.
For more information about TLP, see https://us-cert.cisa.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 9.8
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: Paradox
o Equipment: IP150
o Vulnerabilities: Stack-based Buffer Overflow, Classic Buffer Overflow
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
remotely execute arbitrary code, which may result in the termination of the
physical security system.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Paradox IP150 are affected:
o Paradox IP150 firmware Version 5.02.09
3.2 VULNERABILITY OVERVIEW
3.2.1 STACK-BASED BUFFER OVERFLOW CWE-121
The affected product is vulnerable to three stack-based buffer overflows, which
may allow an unauthenticated attacker to remotely execute arbitrary code.
CVE-2020-25189 has been assigned to these vulnerabilities. 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 ).
3.2.2 BUFFER COPY WITHOUT CHECKING SIZE OF INPUT ('CLASSIC BUFFER OVERFLOW')
CWE-120
The affected product is vulnerable to five post-authentication buffer
overflows, which may allow a logged in user to remotely execute arbitrary code.
CVE-2020-25185 has been assigned to these vulnerabilities. A CVSS v3 base score
of 8.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U
/C:H/I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Multiple Sectors
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: United States
3.4 RESEARCHER
Omri Ben-Bassat of Microsoft reported these vulnerabilities to CISA.
4. MITIGATIONS
Contact Paradox support for mitigation details via email at support@paradox.com
CISA recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. Specifically, users should:
o Ensure the least-privilege user principle is followed.
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls and
isolate them from the business network.
o When remote access is required, use secure methods, such as virtual private
networks (VPNs), recognizing that VPNs may have vulnerabilities and should
be updated to the most current version available. Also recognize that VPN
is only as secure as the connected devices.
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.cisa.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.cisa.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.
No known public exploits specifically target these vulnerabilities.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.
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