Cyberis Blog
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Microsoft Bookings – Facilitating Impersonation
Microsoft Bookings introduces a significant security risk by allowing end users to create fully functional Entra accounts without administrative oversight. These accounts, tied to shared Booking pages, can be exploited for impersonation, phishing, and email hijacking. Attackers could leverage this functionality to bypass security measures, gain unauthorised access to sensitive resources, and facilitate lateral movement within an organisation. Our blog explores these weaknesses in detail and provides recommendations for detection and mitigation.
- Penetration testing
- Research
- Tools and techniques
Bypassing IP based brute force protection with IPv6
Brute-force protections – designed to protect against attacks like password guessing – need to be carefully pitched and have associated pros and cons. Many popular protections these days rely upon monitoring and blocking malicious activity based on source IP address. In this blog post, we explore using IPv6 temporary addressing to bypass IP based brute-force protection.
- Cloud risk management
- Research
- Tools and techniques
Intune hacking: when is a "wipe" not a wipe
In this blog post we explore privilege escalation to SYSTEM with Intune managed devices, and how an Intune "Wipe" is not really a wipe at all.
- Research
CVE-2021-20047: DLL Search Order Hijacking Vulnerability
When looking for methods of execution in controlled environments, software components are an essential area of review. With the implementation of controls such as AppLocker, running arbitrary executables becomes more difficult. In most environments we test, AppLocker is now a common configuration implementation which serves to reduce the attack surface by defining the permitted locations an executable is allowed to run from.
- Research
Let's Talk Quantum Cryptography Pt 2
When testing these types of systems, vulnerabilities can be broken down into two broad classes: Inherent flaws – These occur when an assumption made during the creation of a protocol doesn’t hold to be true, a new mathematical technique for example may break the security of the protocol. An example of a protocol with inherent flaws would be SSLv3. Implementation flaws – These occur because physical systems aren’t perfect, nor is our adaptation of theoretical principles to physical mediums. Where these imperfections exist so does the potential for exploitation. Today we’ll be looking at some implementation flaws, but to begin let’s have a think about the set-up Alice and Bob will need to carry out the steps of the BB84 protocol.
- News
- Research
Domain Hijacking Via Logic Error - Gandi And Route 53 Vulnerability
On 12 February 2021, Cyberis identified a weakness in the domain transfer processes of Gandi which allowed any Nominet registry domain (including .co.uk and org.uk domains) registered with Gandi to be transferred out of the owner’s control and into the control of an arbitrary AWS Route 53 account, without any authorisation being provided by the owner of the domain.
- Research
Code Roulette: Windows Internal Complexities
Since its inception, the Windows operating system has been a recognizable force within the IT industry and grew increasingly common throughout the 90's and 2000's. Features of the operating system have grown over the last 20 years in response to the changing needs within the industry and shifts in attitudes towards system management, user experience and scale. In the early 2000's Windows dominance was largely driven by a combination of a widely accepted end user experience, flexible server components and a centralized authentication, authorization and configuration solution, Active Directory. Whilst there were some alternatives, the reality was that there was no one stop solution for integration that could compete with Active Directory at scale and as most things are driven by business goals, Active Directory became the central hub of IT operations within a significant portion of the commercial and government markets.
- Penetration testing
- Research
Bluetooth: The Spy In The Meeting Room
Bluetooth technology permeates the modern world. From smart phones to wireless speakers, fitness trackers to WiFi mesh hardware, Bluetooth has become the de facto standard for short-range wireless communications. The chances are that you have Bluetooth enabled devices near you as you read this, and, if you're regularly involved in conference calls, you've probably often used a Bluetooth enabled speaker or VoIP phone.
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