CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS
Percentile
65.7%
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This updated advisory is a follow-up to the original advisory titled ICSA-22-307-01 ETIC Telecom Remote Access Server (RAS) that was published November 3, 2022, to the ICS webpage on cisa.gov/ics.
Successful exploitation of these vulnerabilities could allow an attacker to obtain sensitive information and compromise the vulnerable device and other connected machines.
The following versions of ETIC Telecom Remote Access Server (RAS) are affected:
All versions of ETIC Telecom Remote Access Server (RAS) 4.5.0 and priorβs web portal is vulnerable to accepting malicious firmware packages that could provide a backdoor to an attacker and provide privilege escalation to the device.
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CVE-2022-3703 has been assigned to this vulnerability. A CVSS v3 base score of 7.6 has been calculated; the CVSS vector string is (AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H).
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All versions of ETIC Telecom Remote Access Server (RAS) 4.5.0 and priorβs application programmable interface (API) is vulnerable to directory traversal through several different methods. This could allow an attacker to read sensitive files from the server, including SSH private keys, passwords, scripts, python objects, database files, and more.
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CVE-2022-41607 has been assigned to this vulnerability. A CVSS v3 base score of 6.2 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N).
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All versions of ETIC Telecom Remote Access Server (RAS) 4.5.0 and prior is vulnerable to malicious file upload. An attacker could take advantage of this to store malicious files on the server, which could override sensitive and useful existing files on the filesystem, fill the hard disk to full capacity, or compromise the affected device or computers with administrator level privileges connected to the affected device.
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CVE-2022-40981 has been assigned to this vulnerability. A CVSS v3 base score of 5.9 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L).
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Haviv Vaizman, Hay Mizrachi, Alik Koldobsky, Ofir Manzur, and Nikolay Sokolik of OTORIO reported these vulnerabilities to CISA.
ETIC Telecom recommends updating the firmware of the affected devices to the following versions:
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For the installed devices, ETIC Telecom recommends:
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CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. 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 at 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.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01BβTargeted 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.
No known public exploits specifically target these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-3703
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-40981
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-41607
cisa.gov/ics
cisa.gov/ics
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-22-307-01
cwe.mitre.org/data/definitions/22.html
cwe.mitre.org/data/definitions/345.html
cwe.mitre.org/data/definitions/434.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
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us-cert.cisa.gov/ics/Recommended-Practices
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
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www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.etictelecom.com/en/softwares-download/
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