{"id":24951,"date":"2021-01-22T15:43:50","date_gmt":"2021-01-22T07:43:50","guid":{"rendered":"https:\/\/version-2.com\/?p=24951"},"modified":"2022-03-07T14:39:07","modified_gmt":"2022-03-07T06:39:07","slug":"scadafence-researchers-discover-a-dos-vulnerability-in-all-of-abbs-ac500-v2-products","status":"publish","type":"post","link":"https:\/\/version-2.com\/en\/2021\/01\/scadafence-researchers-discover-a-dos-vulnerability-in-all-of-abbs-ac500-v2-products\/","title":{"rendered":"SCADAfence Researchers Discover a DoS Vulnerability in all of ABB’s AC500 V2 products"},"content":{"rendered":"
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\"\"<\/p>\n\n

Our Researchers Discover Another Vulnerability <\/strong><\/p>\n

As part of our mission to secure the world\u2019s OT, IoT and Cyber Physical infrastructures, we invest resources into offensive research of vulnerabilities and attack techniques.<\/p>\n\n

CVE-2020-24685<\/span><\/a> is a CVSS 8.6 (CVSS v3.1 <\/strong>AV:N\/AC:L\/PR:N\/UI:N\/S:C\/C:N\/I:N\/A:H<\/span><\/strong><\/a>) remote CPU DoS vulnerability in all of ABB’s<\/span> AC500 V2 products with onboard ethernet are affected by this vulnerability <\/span>(with latest firmware v2.5.4) that has been discovered by SCADAfence researcher Yossi Reuven.<\/p>\n

ABB<\/span><\/a> is one of the world\u2019s leading electronics and electrical equipment manufacturing companies (holding an overall share in the world DCS market of 19.2%), and is in use by many of our customers. <\/p>\n\n

About The Vulnerability – CVE-2020-24685<\/strong><\/p>\n

AC500 V2 Series is one of ABB\u2019s PLC offerings – designed as a compact entry-level PLCs for small applications. AC500 V2’s communication with Automation Builder (Engineering software package) is done via ABB proprietary wrapper protocol encapsulation of CoDeSys SDE protocol (which works on both TCP and UDP). <\/p>\n

A single<\/strong> specially crafted packet sent by an attacker over the ABB protocol on port 1200 will cause a denial-of-service (DoS) vulnerability. The PLC\u2019s CPU will get into fault mode, causing a hardware failure. The PLC then becomes unresponsive and requires a manual (physical) restart to recover. In addition, the buffer overflow condition may allow remote code execution.<\/p>\n\n

What SCADAfence Recommends Asset Owners To Do<\/strong><\/p>\n\n

Perform an Industrial Vulnerability Management Process<\/strong><\/p>\n

Please refer to our guide on this topic: https:\/\/www.scadafence.com\/public-preview-a-comprehensive-guide-to-industrial-device-patching\/<\/span><\/a><\/p>\n\n

Monitor for Unauthorized Network Activity and Exploitation<\/strong><\/p>\n

Some devices will always remain unpatched. Monitoring is an early warning system that allows you to act before attackers have gained full control over your network.<\/p>\n\n

Upgrade to the Latest Firmware<\/strong><\/p>\n

ABB has developed a new firmware version 2.8.5 fixing this vulnerability. This firmware version is released for the following affected PLC types:
* PM573-ETH
* PM583-ETH<\/p>\n

Currently no firmware update is available to other products in the AC500 V2 line. When ABB makes such a patch available, we recommend asset owners to consider upgrading.<\/p>\n

Prevent Unauthorized and Untrusted Access<\/strong><\/p>\n

– Use a firewall or virtual private network (VPN), etc. to prevent unauthorized access when Internet access is required.<\/p>\n

– Use within a LAN and block access from untrusted networks and hosts through firewalls.<\/p>\n\n

Special Thanks & Recognition<\/strong><\/p>\n

The SCADAfence Research team would like to thank the ABB team for the collaboration.<\/p>\n

ABB has published the advisory<\/a> and released a firmware update to part of the product line.<\/div>\n\n

SCADAfence is committed to continued research of offensive technologies and development of new defensive technologies.<\/p>\n\n

Exploit PoC<\/strong><\/p>\n

We wrote a Python POC (GPLv3) script of the exploit in action.<\/p>\n

Currently, there\u2019s no patch available. As a result, we limit the access to the exploit to vetted individuals only. The exploit is only available for educational and legal research purposes.<\/p>\n

Warning: The script will crash the PLC\u2019s CPU – <\/span>do not use it in production<\/span>.<\/span><\/p>\n

To get this free python exploit, please send an email to research@scadafence.com<\/span><\/a>, identify yourself and explain how you\u2019re going to use the exploit. We reserve the right to refuse any request.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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About Version 2 Digital<\/h3>

Version 2 Digital is one of the most dynamic IT companies in Asia. The company distributes a wide range of IT products across various areas including cyber security, cloud, data protection, end points, infrastructures, system monitoring, storage, networking, business productivity and communication products.\n

\nThrough an extensive network of channels, point of sales, resellers, and partnership companies, Version 2 offers quality products and services which are highly acclaimed in the market. Its customers cover a wide spectrum which include Global 1000 enterprises, regional listed companies, different vertical industries, public utilities, Government, a vast number of successful SMEs, and consumers in various Asian cities.<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t\n\t\t

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<\/p>\n

About SCADAfence<\/strong>
SCADAfence helps companies with large-scale operational technology (OT) networks embrace the benefits of industrial IoT by reducing cyber risks and mitigating operational threats. Our non-intrusive platform provides full coverage of large-scale networks, offering best-in-class detection accuracy, asset discovery and user experience. The platform seamlessly integrates OT security within existing security operations, bridging the IT\/OT convergence gap. SCADAfence secures OT networks in manufacturing, building management and critical infrastructure industries. We deliver security and visibility for some of world\u2019s most complex OT networks, including Europe\u2019s largest manufacturing facility. With SCADAfence, companies can operate securely, reliably and efficiently as they go through the digital transformation journey.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Our Researchers Discover Another Vulnerability  As […]<\/p>","protected":false},"author":143524195,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[417,461,61],"tags":[418,462],"class_list":["post-24951","post","type-post","status-publish","format-standard","hentry","category-scadafence","category-year2021","category-press-release","tag-scadafence","tag-462"],"acf":[],"yoast_head":"\nSCADAfence Researchers Discover a DoS Vulnerability in all of ABB's AC500 V2 products - Version 2<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.scadafence.com\/scadafence-researchers-discover-a-dos-vulnerability-in-abb-ac500-eco-cpus\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SCADAfence Researchers Discover a DoS Vulnerability in all of ABB's AC500 V2 products - 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