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
EPSS
Percentile
54.6%
Successful exploitation of these vulnerabilities could allow an attacker to escalate privileges, access restricted pages, or hijack sessions.
The following Sielco devices are affected:
3.2.1 Improper Access Control CWE-284
The cookie session ID is of insufficient length and can be exploited by brute force, which may allow a remote attacker to obtain a valid session, bypass authentication, and manipulate the transmitter.
CVE-2023-42769 has been assigned to this vulnerability. A CVSS v3.1 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 Cross-Site Request Forgery CWE-352
The application interface allows users to perform certain actions via HTTP requests without performing any validity checks to verify the requests. This can be exploited to perform certain actions with administrative privileges if a logged-in user visits a malicious web site.
CVE-2023-45317 has been assigned to this vulnerability. A CVSS v3.1 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).
3.2.3 Improper Access Control CWE-284
The application suffers from improper access control when editing users. A user with read permissions can manipulate users, passwords, and permissions by sending a single HTTP POST request with modified parameters.
CVE-2023-45228 has been assigned to this vulnerability. A CVSS v3.1 base score of 6.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).
3.2.4 Privilege Defined With Unsafe Actions CWE-267
The application suffers from a privilege escalation vulnerability. A user with read permissions can elevate privileges by sending a HTTP POST to set a parameter.
CVE-2023-41966 has been assigned to this vulnerability. A CVSS v3.1 base score of 6.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).
CISA discovered public proof of concept of these vulnerabilities as authored by Gjoko Krstic of ZeroScience.
Sielco has not responded to requests to work with CISA to mitigate these vulnerabilities. Users of affected versions of Sielco PolyEco FM Transmitter are invited to contact Sielco customer support for additional information.
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, such as:
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 cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report 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:
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-41966
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-42769
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-45228
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-45317
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-23-299-08
cwe.mitre.org/data/definitions/267.html
cwe.mitre.org/data/definitions/284.html
cwe.mitre.org/data/definitions/284.html
cwe.mitre.org/data/definitions/352.html
github.com/cisagov/CSAF
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Sielco%20Radio%20Link%20and%20Analog%20FM%20Transmitters+https://www.cisa.gov/news-events/ics-advisories/icsa-23-299-08
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.cisa.gov/resources-tools/resources/ics-recommended-practices
www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf
www.cisa.gov/topics/industrial-control-systems
www.cisa.gov/topics/industrial-control-systems
www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
www.cisa.gov/uscert/ncas/tips/ST04-014
www.cisa.gov/uscert/sites/default/files/publications/emailscams0905.pdf
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
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www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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