Technical Advisory – U-Boot – Unchecked Download Size and Direction in USB DFU (CVE-2022-2347)

Vendor: DENX Software Engineering Vendor URL: https://www.denx.de/wiki/U-Boot Versions affected: v2012.10-rc1 to v2023.01-rc1 Systems Affected: All systems with CONFIG_DFU_OVER_USB or CONFIG_SPL_DFU enabled Author: <Sultan Qasim Khan> <sultan.qasimkhan[at]nccgroup[dot]com> CVE Identifier: CVE-2022-2347 Risk: High 7.1 (CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H) Summary U-Boot is a popular and feature-rich bootloader for embedded systems. It includes optional support for the USB Device Firmware Update (DFU) … Continue reading Technical Advisory – U-Boot – Unchecked Download Size and Direction in USB DFU (CVE-2022-2347)

Puckungfu: A NETGEAR WAN Command Injection

Summary Vulnerability Details Overview Execution Flow /bin/pucfu /usr/lib/libfwcheck.so get_check_fw fw_check_api curl_post /lib/libpu_util.so SetFileValue pegaPopen Check Firmware HTTPS Normal Request & Response Exploitation Command Injection Response Root Shell Final Notes Patch Pwn2Own Note Summary This blog post describes a command injection vulnerability found and exploited in November 2022 by NCC Group in the Netgear RAX30 router’s … Continue reading Puckungfu: A NETGEAR WAN Command Injection

MeshyJSON: A TP-Link tdpServer JSON Stack Overflow

Summary Target Binary tdpServer Architecture & Mitigations Forks Understanding The Vulnerability Reaching The Vulnerable Function Broadcast Fork Flow Server Fork Flow JSON Array Stack Overflow Triggering The Bug Broadcast Fork Response Server Fork Request Vulnerability Constraints Storing Arbitrary Content In Memory cJSON Summarized cJSON Struct cJSON Data cJSON Heap Memory Single cJSON cJSON structure and … Continue reading MeshyJSON: A TP-Link tdpServer JSON Stack Overflow

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)

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!

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

There’s Another Hole In Your SoC: Unisoc ROM Vulnerabilities

UNISOC (formerly Spreadtrum) is a rapidly growing semiconductor company that is nowadays focused on the Android entry-level smartphone market. While still a rare sight in the west, the company has nevertheless achieved impressive growth claiming 11% of the global smartphone application processor market, according to Counterpoint Research. Recently, it's been making its way into some … Continue reading There’s Another Hole In Your SoC: Unisoc ROM Vulnerabilities

Technical Advisory – Multiple vulnerabilities in Nuki smart locks (CVE-2022-32509, CVE-2022-32504, CVE-2022-32502, CVE-2022-32507, CVE-2022-32503, CVE-2022-32510, CVE-2022-32506, CVE-2022-32508, CVE-2022-32505)

The following vulnerabilities were found as part of a research project looking at the state of security of the different Nuki (smart lock) products. The main goal was to look for vulnerabilities which could affect to the availability, integrity or confidentiality of the different devices, from hardware to software. Eleven vulnerabilities were discovered. Below are … Continue reading Technical Advisory – Multiple vulnerabilities in Nuki smart locks (CVE-2022-32509, CVE-2022-32504, CVE-2022-32502, CVE-2022-32507, CVE-2022-32503, CVE-2022-32510, CVE-2022-32506, CVE-2022-32508, CVE-2022-32505)

Updated: Technical Advisory and Proofs of Concept – Multiple Vulnerabilities in U-Boot (CVE-2022-30790, CVE-2022-30552)

By Nicolas Bidron, and Nicolas Guigo. [Editor's note: This is an updated/expanded version of these advisories which we originally published on June 3 2022.] U-boot is a popular boot loader for embedded systems with implementations for a large number of architectures and prominent in most linux based embedded systems such as ChromeOS and Android Devices. … Continue reading Updated: Technical Advisory and Proofs of Concept – Multiple Vulnerabilities in U-Boot (CVE-2022-30790, CVE-2022-30552)

Technical Advisory – Multiple Vulnerabilities in U-Boot (CVE-2022-30790, CVE-2022-30552)

By Nicolas Bidron, and Nicolas Guigo. U-boot is a popular boot loader for embedded systems with implementations for a large number of architectures and prominent in most Linux based embedded systems such as ChromeOS and Android Devices. Two vulnerabilities were uncovered in the IP Defragmentation algorithm implemented in U-Boot, with the associated technical advisories below: … Continue reading Technical Advisory – Multiple Vulnerabilities in U-Boot (CVE-2022-30790, CVE-2022-30552)