So long and thanks for all the 0day

After nearly four years into my role, I am stepping down as NCC Group’s SVP & Global Head of Research. In part just for myself, to reflect on a whirlwind few years, and in part as a thank you and celebration of all of the incredible researchers with whom I have had the privilege of … Continue reading So long and thanks for all the 0day →

A jq255 Elliptic Curve Specification, and a Retrospective

First things first: there is now a specification for the jq255e and jq255s elliptic curves; it is published on the C2SP initiative and is formally in (draft) version 0.0.1: https://github.com/C2SP/C2SP/blob/main/jq255.md The jq255e and jq255s groups are prime-order groups appropriate for building cryptographic protocols, and based on elliptic curves. These curves are from the large class … Continue reading A jq255 Elliptic Curve Specification, and a Retrospective →

Technical Advisory – NXP i.MX SDP_READ_DISABLE Fuse Bypass (CVE-2022-45163)

Vendor: NXP Semiconductors Vendor URL: https://www.nxp.com Affected Devices: i.MX RT 101x, i.MX RT102x, i.MX RT1050/6x, i.MX 6 Family, i.MX 7 Family, i.MX8M Quad/Mini, Vybrid Author: Jon Szymaniak <jon.szymaniak(at)nccgroup.com> CVE: CVE-2022-45163 Advisory URL: https://community.nxp.com/t5/Known-Limitations-and-Guidelines/SDP-Read-Bypass-CVE-2022-45163/ta-p/1553565 Risk: 5.3 (CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N), 2.6 if C:L, 0.0 if C:N Summary NXP System-on-a-Chip (SoC) fuse configurations with the SDP READ_REGISTER operation disabled (SDP_READ_DISABLE=1) … Continue reading Technical Advisory – NXP i.MX SDP_READ_DISABLE Fuse Bypass (CVE-2022-45163) →

Tool Release – Web3 Decoder Burp Suite Extension

Web3 Decoder is a Burp Suite Extension that allows to decode "web3" JSON-RPC calls that interact with smart contracts in a EVM blockchain. As it is said that a picture is worth a thousand words, the following two screenshots shows a Raw JSON-RPC call, and its decoded function call: Background When auditing a DApp (Decentralized … Continue reading Tool Release – Web3 Decoder Burp Suite Extension →

Check out our new Microcorruption challenges!

New Microcorruption challenges created by Nick Galloway and Davee Morgan Today we are releasing several new challenges for the embedded security CTF, Microcorruption. These challenges highlight types of vulnerabilities that NCC Group’s Hardware and Embedded Systems practice have discovered in real products. The new challenges provide a simple interface to explore these vulnerabilities without having … Continue reading Check out our new Microcorruption challenges! →

Technical Advisory – OpenJDK – Weak Parsing Logic in java.net.InetAddress and Related Classes

Vendor: OpenJDK Project Vendor URL: https://openjdk.java.net Versions affected: 8-17+ (and likely earlier versions) Systems Affected: All supported systems Author: Jeff Dileo <jeff.dileo[at]nccgroup[dot]com> Advisory URL / CVE Identifier: TBD Risk: Low (implicit data validation bypass) Summary The private static InetAddress::getAllByName(String,InetAddress) method is used internally and by the public static InetAddress::getAllByName(String) to resolve host or IP strings … Continue reading Technical Advisory – OpenJDK – Weak Parsing Logic in java.net.InetAddress and Related Classes →

Shining New Light on an Old ROM Vulnerability: Secure Boot Bypass via DCD and CSF Tampering on NXP i.MX Devices

NXP’s HABv4 API documentation references a now-mitigated defect in ROM-resident High Assurance Boot (HAB) functionality present in devices with HAB version < 4.3.7. I could find no further public documentation on whether this constituted a vulnerability or an otherwise “uninteresting” errata item, so I analyzed it myself! This post shines new light on this old … Continue reading Shining New Light on an Old ROM Vulnerability: Secure Boot Bypass via DCD and CSF Tampering on NXP i.MX Devices →

Detecting Mimikatz with Busylight

In 2015 Raphael Mudge released an article [1] that detailed that versions of mimikatz released after 8th of October, 2015 had a new module that was utilising certain types of external USB devices to flash lights in different colours if mimikatz was executed. The technique presented in the article required certain kind of busylights that … Continue reading Detecting Mimikatz with Busylight →

Whitepaper – Project Triforce: Run AFL On Everything (2017)

Six years ago, NCC Group researchers Tim Newsham and Jesse Hertz released TriforceAFL - an extension of the American Fuzzy Lop (AFL) fuzzer which supports full-system fuzzing using QEMU - but unfortunately the associated whitepaper for this work was never published. Today, we’re releasing it for the curious reader and historical archives alike. While fuzzing … Continue reading Whitepaper – Project Triforce: Run AFL On Everything (2017) →