
25 Nov 2016
How to Prevent an IoT Botnet Attack
Earlier this year, we discussed the threat of 'thingbots' - a botnet made of zombie IoT devices. As we’ve seen recently, that threat has become a reality, used in sophisticated DDoS attacks on infosecurity site KrebsOnSecurity and perhaps most famously, DNS provider Dyn, which cut off access to some of the internet’s most trafficked websites.
How Do "Innocent" Things Become Thingbots?
Let’s use the Mirai botnet, the one behind the attacks mentioned above as an example of how thingbots work. Currently made up of about 500,000 compromised IoT devices (e.g. surveillance cameras, routers and digital video recorders [DVRs]) around the world, Mirai is constantly scanning for and targeting devices with commonly used default administrative credentials. Using dictionary attacks, it’s estimated these targeted devices can be compromised, or taken over, by Mirai in about 10 minutes.
The root of the issue is poor authentication practices. Those default passwords are hardcoded into the device during the manufacturing process and as the size of Mirai indicates, are often never updated again, leaving them ripe for exploiting by Mirai or some other type of botnet.
Best Practices for Device Manufacturers to Prevent Botnets
Let’s take a look at some best practices manufactures should consider to help protect their devices from becoming thingbots from the start.
Consider Limiting the Capabilities of Devices - Do They Need Remote Access?
Do these devices actually need to be accessed and administered remotely? Can authentication into the device environment be effectively eliminated? Removing this capability would close the hole Mirai is currently using to access and take over devices.
If You Need Remote Access, Implement Strong Device Authentication
Mirai takes advantage of the worst aspects of device passwords – default passwords are rarely changed and are rarely unique, often reused across a batch of devices. OWASP has some great basic guidance on password policy for IoT device manufacturers that could help prevent this type of attack in the future, but we’d suggest looking beyond the password alone when considering strong authentication methods.
For example, PKI offers multiple benefits for strong device authentication. First, the technology is very difficult, if not technically infeasible to spoof. Using it as part of the authentication process prevents dictionary based authentication attacks, such as those used by Mirai.
PKI also gives you have the ability to use unique authentication credentials for the authenticating entities (both device and service). At time of device build, it is better to include unique device authentication credentials per device, rather than using shared or common authentication credentials for a range of devices. Even better is to leverage hardware security elements to protect the private keys on devices and prevent the credentials from being stolen or migrated off of the devices themselves.
Consider Strong Authentication for Administrative Users and Services
If you are going to enable login to the device itself for administrative purposes - either for a user or a service, you need to use stronger authentication methods there as well. One approach also involves using a PKI-based trust model. This is where the devices are built or provisioned with the trust anchor of a Certificate Authority (and potentially other authentication rules, like expected domains of trusted servers), which enables the devices to leverage a stronger authentication method than just username and password for services to run.
Ensuring Only Authorized Software and Firmware Updates
As an additional layer of security, devices also should be configured with logic to verify any software updates that are pushed from a service. This can help prevent untrusted software, like the malware in the Dyn attack, from being installed on the devices. This validation logic will be based on a trust anchor or root, which can be provisioned onto the device during the manufacturing process and will determine which software to trust prior to execution or installation.
There needs to be a way for the device to use its trust roots to identify and validate it. This is another area to apply PKI for stronger security posture and can be achieved by digitally signing code, binding it to the developer’s identity. The digital signature and identity represented in the Digital Certificate would then be verified prior to execution. For example, you can specify that only software from XYZ Company signed with a certain type of certificate will be installed.
PKI Is Just One Piece of the Puzzle
IoT security is a deep and important topic for any device manufacturer to consider. There are many viable approaches toward mitigating attacks like these and I've presented part of the comprehensive security story here. The extent of the solution that is selected depends on the risks and risk mitigation concerns of the organization.
However, as we're starting to see, there is fairly well established baseline of minimums that IoT providers have responsibility of addressing. Some of these concerns are enumerated in guidance from OWASP, OTA and Underwriters Lab.
GlobalSign is here and interested in helping organization address implementation of these guidance principles from the design stage through large scale production deployment.
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GlobalSign Privacy Policy Version 3.1
Updated June 5, 2018
GlobalSign respects your right to privacy. This privacy policy has been developed to inform you about the privacy practices followed by GlobalSign in connection with its websites, products and services. This privacy policy does not apply to GlobalSign services offered by or through our partners, resellers or other third parties, or other third party services or websites, and we encourage you to read the privacy policies of those parties.
This privacy policy will inform you about what data is collected, how we use such data, where data is processed, how you may opt out of your data being used, the security provisions around storing your data and how to correct, update or delete your data.
1. Data Controller
The data controller for personal data collected within the EU is GMO GlobalSign, Ltd., having its registered offices at Springfield House, Sandling Road, Maidstone, Kent, ME14 2LP, United Kingdom. All questions or requests regarding the processing of data may be addressed to: dpo@globalsign.com.
2. Collection of Personal Information
We collect information from you when you (i) place an order for a GlobalSign digital certificate product or other product or service, (ii) scan your servers for digital certificates using our Certificate Inventory Tool (CIT), (iii) apply for access to our managed service platforms, (iv) subscribe to our newsletter, (v) use our online chat service, (vi) download a white paper, (vii) register for a webinar, (viii) respond to a survey, (ix) fill out a form for pre/post sales assistance, (x) open a support ticket, or (xi) your use of social media.
GlobalSign is a Certification Authority and trusted third party. To fulfill requests for digital certificates or other products or services, you may be asked to enter your name, email address, physical address, phone number, credit card information and/or organizational details or other personal information.
- - Contact information such as your name, email address, physical address, and phone number.
- - Relationship information that helps us do business with you, such as the types of products and services that may interest you, contact and product preferences, languages, marketing preferences and demographic data.
- - Transactional information about how you interact with us, including purchases, inquiries, customer account information, billing and credit card information, organizational details, transaction and correspondence history, and information about how you use and interact with our website.
We may develop and acquire additional information about you using third-party (public and private) data sources such as third party databases and government agencies, as well as your browsing and purchasing history in order to process orders for certificates and to improve our services.
GlobalSign treats personal information as confidential, except for the information included in an issued digital certificate. Such information may be verified using third party commercial and government resources, and as such, is deemed to be public information.
3. Purpose of Processing
Your personal data will be used for the purposes specified below:
3.1 To process applications for GlobalSign products and services
Your information is used to provide our products and services and order processing as well as to conduct business transactions such as billing.
3.2 To improve customer service
Your information helps us to more effectively respond to your pre/post sales requests and provide technical support.
3.3 To send renewal notices
The email address you provide for order processing may be used to send you renewal notices for your expiring digital certificate.
3.4 To send service updates
In addition, subject to your consent where required, we may send you new service updates, security updates, related product or service information, and status updates on maintenance windows or service availability.
3.5 To tell you about our products and services
Subject to your consent where required, we may send you periodic company newsletters, information about our products and services that may be of interest to you based on your use of other GlobalSign products and services, your attendance at GlobalSign sponsored marketing events such as webinars, your requests for information about similar products and services, or your sharing of data with social media sites such as LinkedIn or Facebook.
4. Legal Basis for Processing Personal Data
We will process your data for the purpose of performance of our contract with you or the legitimate interest of GlobalSign, which are our usual business activities. In other cases, we will request your consent for the processing of the personal data you may submit.
Your refusal to provide personal data to us for certain products and services may hinder us from fulfilling your order for those products or services. Also, if you deny or withdraw your consent to use personal data or opt out of receiving information about GlobalSign products and services this may result in you not being made aware of renewal notices, periodic company newsletters, new service updates, security updates, related product or service information, and status updates on maintenance windows or service availability. See Section 10 below for how to withdraw your consent.
5. Use of Cookies and web beacons
The GlobalSign Certificate Center (GCC) uses cookies to enable the fulfillment of services. Cookies may be used when you log into the GCC, purchase products or use certain GCC functions.
In addition, like most online businesses, GlobalSign uses cookies and web beacons on our websites and through marketing related emails to gather and analyze some personal data such as the visitor's IP address, browser type, ISP, referring page, operating system, date/time and basic geographical information.
We use cookies and web beacons to compile aggregate data about site traffic and site interaction so that we can gauge the effectiveness of our communications and offer better site experiences and tools in the future. We may contract with third-party service providers to assist us in better understanding our site visitors. These service providers are not permitted to use the information collected on our behalf except to help us conduct and improve our business.
First time visitors may choose to not have any activity monitoring cookies set in their browser. We use an opt-out identification cookie to tag these users as having made this decision. Those cookies that pertain to site performance, experience improvement and marketing are programmed not to execute when an opt-out cookie is present in a visitor's browser. Opt-out cookies persist until a visitor clears their browser cookies, or until their expiration one year after the set date. A visitor is required to opt out again after one year in order to disable any activity monitoring cookies.
More details of GlobalSign's use of cookies can be found on our website at https://www.globalsign.com/en/repository/cookie-policy/
6. Use of application logs for diagnostics or to gather statistical information
Our servers automatically record information ("Application Log Data") created by your use of our services. Application Log Data may include information such as your IP address, browser type, operating system, the referring web page, pages visited, location, your mobile carrier, device and application IDs, search terms, and cookie information. We use this information to diagnose and improve our services. Except as stated in section 8 (Data Retention), we will either delete the Application Log Data or remove any account identifiers, such as your username, full IP address, or email address, after 12 months.
7. Sharing of Information and Transfers of Data
We do not sell or trade your personal information to outside parties.
Within GlobalSign: GlobalSign is a global organization with business processes and technical systems in various countries. As such, we may share information about you within our group company and transfer it to countries in the world where we do business in connection with the uses identified in section 3 above and in accordance with this Privacy Policy. In cases where your personal data is transferred to countries that do not provide an adequate level of protection according to the European Commission ('adequacy decision'), we ensure your data is protected by entering into agreements containing standard contractual clauses approved by the European Commission with each of our group companies. A copy of these agreements may be obtained by contacting us as outlined in section 15 below.
Third Parties: We may also transfer your personal data to trusted third parties and our partners in order to serve purposes that are specified in section 3 above. GlobalSign uses a third party to process credit card payments and provides credit card numbers and identifying financial data directly to the third party credit card processor.
In circumstances where data is shared with such third parties, they are required to comply with confidentiality terms included in our data processing agreements. This prohibits such third parties from selling, trading, using, marketing or otherwise distributing GlobalSign customer data.
As Required by Law: We may also release your information when we believe release is appropriate to comply with the law or protect our rights, property, or safety.
It is our policy to notify customers of requests for their data from law enforcement unless we are prohibited from doing so by statute or court order. Law enforcement officials who believe that notification would jeopardize an investigation should obtain an appropriate court order or other process that specifically precludes member notification, such as an order issued pursuant to 18 U.S.C. §2705(b).
Mergers & Acquisitions: We may also disclose your personal information to third parties who may take over the operation of our site or who may purchase any or all of our assets, including your personal information. We will contact you using the details you provide if there is any change in the person controlling your information.
8. International Transfers
The third parties, subsidiaries and affiliates to which your personal information can be disclosed may be located throughout the world. Therefore, information may be sent to countries having different privacy protection standards than your country of residence. In such cases, we take measures to ensure that your personal information receives an adequate level of protection, which includes the EU Standard Contractual Clauses to protect your personal information.
9. Data retention
The personal information we collect is retained for no longer than necessary to fulfil the stated purposes in section 2 above or for a period specifically required by law or regulation that GlobalSign is obligated to follow.
To meet public CA audit requirements as detailed in the GlobalSign Certification Practice Statement, personal data used to fulfill verification of certain types of digital certificate applications will be retained for a minimum of 10 years depending on the class of product or service and may be retained in either a physical or electronic format. Please refer to the GlobalSign Certification Practice Statement for full details.
After the retention period is over, GlobalSign securely disposes or anonymizes your personal information in order to prevent loss, theft, misuse, or unauthorized access.
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If at any time you would like to unsubscribe from receiving future emails, we include unsubscribe instructions at the bottom of each email.
Renewal notices may be cancelled on a per digital certificate basis by logging into your GlobalSign Certificate Center (GCC) account and disabling renewal notices.
Email preferences for CIT related/collected information can be updated and changed within CIT.
If GlobalSign is processing your personal data based on your consent, you may withdraw your consent at any time via the GlobalSign Preference Centre at https://downloads.globalsign.com/acton/media/2674/preference-center-login or by contacting us at one of the addresses shown in section 15 below.
11. Your Rights
You are responsible for providing GlobalSign with true, accurate, current and complete personal information. Also, you are responsible to maintain and promptly update the information to keep it true, accurate, current and complete.
You have the right to access and modify your personal data stored on GlobalSign systems. You can exercise your rights by contacting us in writing. We will require you to provide identification in order to verify the authenticity as the data subject. We will make reasonable efforts to respond to and process your request as required by law.
To the extent of applicable law, you may have the right to request erasure of your personal information, restriction of processing as it applies to you, object to processing and the right to data portability. You may also have the right to lodge a complaint with a supervisory authority.
If you provide any information that is untrue, inaccurate, not current or incomplete, or if we have reasonable grounds to suspect that such information is untrue, inaccurate, not current or incomplete, we have the right to suspend or terminate your account and refuse any and all current or future services.
12. How we protect your information
We implement a variety of security measures to maintain the safety of your personal information when you place an order or enter, submit, or access your personal information. All supplied sensitive/credit information is transmitted via Secure Socket Layer (SSL).
After a transaction, your transaction-related information will be kept on file to meet audit requirements and facilitate renewals. We do not retain any credit card details.
13. Relevant laws
GlobalSign commits itself to protect the personal information submitted by applicants and subscribers for its public certification services. GlobalSign declares to fully respect all rights established and laid out in European Union and Member States' laws and regulations:
- - European Directive 95/46 on the protection of individuals with regard to the processing of personal data and on the free movement of such data and as replaced by Regulation EU 2016/679 on the protection of natural persons with regard to the processing of personal data and on the free movement of such data (the EU General Data Protection Regulation); and
- - Provisions of the GlobalSign CPS.
14. Changes to our Privacy Policy
If we make material changes to our privacy policy, we will inform customers by emailing a notice of the availability of a new version with a link to the new version.
15. Contact Us
If you have any inquires, or questions regarding our privacy policy, please contact us at:
- We use the data you submit only for purposes identified in section 3 of this privacy policy.
- You have the right to review your personal data that GlobalSign holds and check it for accuracy.
- You have the right to correct data in the case that errors may be found in our records.
- You have the right to request that any of your personal data be erased. i.e. right to be forgotten.
- You have the right to obtain and reuse use your personal data for your own purposes
- You have the right to request that GlobalSign restrict the processing of your personal data under certain circumstances.
- You have the right to object to our processing of your personal data.
14. Changes to our Privacy Policy
If we make material changes to our privacy policy, we will inform customers by emailing a notice of the availability of a new version with a link to the new version.
15. Contact Us
If you have any inquires, or questions regarding our privacy policy, please contact us at:
https://support.globalsign.com/
https://www.globalsign.com/en/company/contact/support/
https://jp.globalsign.com/support/
or
Deputy Data Protection Officer
GMO GlobalSign, Ltd.
Springfield House Sandling Road
Maidstone, Kent ME 14 2LP
United Kingdom
dpo@globalsign.com
16. Our Office Locations
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