Whitepaper – Exploring the Security of KaiOS Mobile Applications

KaiOS is a mobile operating system, forked from the discontinued Firefox OS, in which all the mobile applications running on a KaiOS-based mobile device are built using web technologies, such as HTML, JavaScript, and CSS. In this independent research project, we demonstrate that six of the pre-installed mobile applications are vulnerable to remote, and local, … Continue reading Whitepaper – Exploring the Security of KaiOS Mobile Applications

Research Report – Zephyr and MCUboot Security Assessment

Over the years, NCC Group has audited countless embedded devices for our customers. Through these security assessments, we have observed that IoT devices are typically built using a hodgepodge of chipset vendor board support packages (BSP), bootloaders, SDKs, and an established Real Time Operating System (RTOS) such as Mbed or FreeRTOS. However, we have recently … Continue reading Research Report – Zephyr and MCUboot Security Assessment

Whitepaper – Coinbugs: Enumerating Common Blockchain Implementation-Level Vulnerabilities

By Aleksandar Kircanski and Terence Tarvis A good amount of effort has been dedicated to surveying and systematizing Ethereum smart contract security bug classes. There is, however, a gap in literature when it comes to surveying implementation-level security bugs that commonly occur in basic PoW blockchain node implementations, discovered during the first decade of Bitcoin’s … Continue reading Whitepaper – Coinbugs: Enumerating Common Blockchain Implementation-Level Vulnerabilities

Whitepaper – Microcontroller Readback Protection: Bypasses and Defenses

By Sultan Qasim Khan Microcontrollers commonly include features to prevent the readout of sensitive information in internal storage. Such features are commonly referred to as readback protection or readout protection. This paper describes common readback protection implementation flaws, discusses techniques that can be used to defeat readback protection, and provides guidance to implement effective readback … Continue reading Whitepaper – Microcontroller Readback Protection: Bypasses and Defenses

Exploiting the win32k!xxxEnableWndSBArrows use-after-free (CVE-2015-0057) bug on both 32-bit and 64-bit

tl;dr Earlier this year I worked on an exploit for an interesting use-after-free vulnerability in win32k.sys (CVE-2015-0057) and was able to develop a reliable exploit on both 32-bit and 64-bit, affecting XP through Windows 8.1 (with a few exceptions). This writeup describes in detail how I approached exploitation on both architectures, which ended up being … Continue reading Exploiting the win32k!xxxEnableWndSBArrows use-after-free (CVE-2015-0057) bug on both 32-bit and 64-bit

Whitepaper – XML Schema, DTD, and Entity Attacks: A Compendium of Known Techniques

by Timothy D. Morgan and Omar Al Ibrahim The eXtensible Markup Language (XML) is an extremely pervasive technology used in countless software projects. A core feature of XML is the ability to define and validate document structure using schemas and document type definitions (DTDs). When used incorrectly, certain aspects of these document definition and validation … Continue reading Whitepaper – XML Schema, DTD, and Entity Attacks: A Compendium of Known Techniques

Advice for security decision makers contemplating the value of Antivirus

Over the last 12 months there has been an increasing amount of analysis on the effectiveness of desktop AntiVirus and its ability to detect and stop the reality of targeted attacks (I refuse to use the APT banner). This critique has been covered in pieces such as: The death of antivirus software (Infosec Island, January 2012)Is … Continue reading Advice for security decision makers contemplating the value of Antivirus