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AUSCERT External Security Bulletin Redistribution
ESB-2023.3841
ICS Advisory | ICSA-23-187-02 ABUS TVIP
7 July 2023
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AusCERT Security Bulletin Summary
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Product: ABUS TVIP
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2023-26609
Original Bulletin:
https://www.cisa.gov/news-events/ics-advisories/icsa-23-187-02
Comment: CVSS (Max): 7.2 CVE-2023-26609 (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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ICS Advisory (ICSA-23-187-02)
ABUS TVIP
Release Date
July 06, 2023
1. EXECUTIVE SUMMARY
o CVSS v3 7.2
o ATTENTION: Exploitable remotely/low attack complexity/public exploits are
available
o Vendor: ABUS
o Equipment: ABUS Security Camera
o Vulnerability: Command injection
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow arbitrary file reads
or remote code execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of ABUS TVIP, an indoor security camera, are affected:
o ABUS TVIP: 20000-21150
3.2 VULNERABILITY OVERVIEW
3.2.1 COMMAND INJECTION CWE-77
ABUS TVIP 20000-21150 devices allows remote attackers to execute arbitrary code
via shell metacharacters in the /cgi-bin/mft/wireless_mft ap field.
CVE-2023-26609 has been assigned to this vulnerability. A CVSS v3 base score of
7.2 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:H/UI:N/S:U/
C:H/I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Comercial Facilities
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
The Chaos Computer Club (CCC) reported this vulnerability to ABUS.
4. MITIGATIONS
In 2019, ABUS conducted a replacement campaign to encourage users to replace
the affected devices with newer models such as TVIP82561.
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls and
isolate them from business networks.
o When remote access is required, use secure methods, such as virtual private
networks (VPNs), recognizing VPNs may have vulnerabilities and should be
updated to the most current version available. Also recognize VPN is only
as secure as its 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 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-12-146-01B–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.
Public exploits specifically target this vulnerability. This vulnerability is
exploitable remotely. This vulnerability has low attack complexity.
This product is provided subject to this Notification and this Privacy & Use
policy.
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The University of Queensland
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