Month: August 2023

Juplink RX4-1500 Stack-based Buffer Overflow Vulnerability

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EIP-b5185f25

A stack-based buffer overflow exists in Juplink RX4-1500, a WiFi router. An authenticated attacker can exploit this vulnerability to achieve code execution as root.

Vulnerability Identifiers

  • Exodus Intelligence: EIP-b5185f25
  • MITRE: CVE-2023-41028

Vulnerability Metrics

  • CVSSv2 Vector: AV:A/AC:L/Au:S/C:C/I:C/A:C
  • CVSSv2 Score: 7.7

Vendor References

  • The affected product is end-of-life and no patches are available.

Discovery Credit

  • Exodus Intelligence

Disclosure Timeline

  • Vendor response to disclosure: August 21, 2021
  • Disclosed to public: August 23, 2023

Further Information

Readers of this advisory who are interested in receiving further details around the vulnerability, mitigations, detection guidance, and more can contact us at sales@exodusintel.com.

Researchers who are interested in monetizing their 0day and Nday can work with us through our Research Sponsorship Program (RSP).

Public Mobile Exploitation Training – Fall 2023

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Mobile Exploitation Training

We are pleased to announce that the researchers of Exodus Intelligence will be providing publicly available training in person on November 14 2023 in London, England.

This 4 day course is designed to provide students with both an overview of the Android attack surface and an in-depth understanding of advanced vulnerability and exploitation topics. Attendees will be immersed in hands-on exercises that impart valuable skills including static and dynamic reverse engineering, zero-day vulnerability discovery, binary instrumentation, and advanced exploitation of widely deployed mobile platforms.

Taught by Senior members of the Exodus Intelligence Mobile Research Team, this course provides students with direct access to our renowned professionals in a setting conducive to individual interactions.

Emphasis

Hands on with privilege escalation techniques within the Android Kernel, mitigations and execution migration issues with a focus on MediaTek chipsets.

Prerequisites

  • Computer with the ability to run a VirtualBox image (x64, recommended 1GB+ memory)
  • Some familiarity with: IDA Pro, Python, C/C++.
  • ARM ASM fluency strongly recommended.
  • Installed and usable copy of IDA Pro 6.1+, VirtualBox, Python 2.7+.

Course Information

Attendance will be limited to 18 students per course.

Cost: $5000 USD per attendee

Dates: November 14-17, 2023

Location: the London, UK area

Syllabus

Android Kernel

 

  • Process Management
    • General overview
    • Important structures
  • Kernel synchronization
  • Memory Management
    • General overview
    • Virtual memory
    • Memory allocators
  • Debugging environment
    • Build the kernel
    • Boot and Root the kernel
    • Kernel debugging
    • demo
  • SELinux
  • Samsung Knox/RKP
  • Type of kernel vulnerabilities
    • Exploitation primitives
    • kernel vulnerabilities overview
    • heap overflows, UAF
    • Info leakage
  • [CVE-various] Mali GPU bug
    • Mali GPU
    • Vulnerability overview
    • Exploitation
  • [CVE-2020-0466] double-free vulnerability
    • Vulnerability overview
    • Exploitation
      • type confusion to write access to globally shared memory
      • UAF which can lead to arbitrary read and write of kernel memory
    • [CVE-2021-22600] double-free vulnerability
      • Vulnerability overview
      • Exploitation – convert the double free into a use-after-free of a struct page

 

Mediatek / Exynos baseband

  • Introduction
    • exynos baseband overview
    • mediatek baseband overview
  • Environment
  • Previous researches
  • Analyze modem
  • Emulation / Fuzzing
  • Rogue base station
  • secure boot
  • mediatek boot rom vulnerability
    • Vulnerability overview
    • Exploitation
  • baseband debugger
    • use brom exploit to patch the tee
    • write the modem physical memory from EL1

 

Public Browser Exploitation Training – Fall 2023

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Browser Exploitation Training

We are pleased to announce that the researchers of Exodus Intelligence will be providing publicly available training in person on November 14 2023 in London, England.

This 4 day course is designed to provide students with both an overview of the current state of the browser attack surface and an in-depth understanding of advanced vulnerability and exploitation topics. Attendees will be immersed in hands-on exercises that impart valuable skills including static and dynamic reverse engineering, zero-day vulnerability discovery, and advanced exploitation of widely deployed browsers such as Google Chrome and Apple Safari.

Taught by Senior members of the Exodus Intelligence Browser Research Team, this course provides students with direct access to our renowned professionals in a setting conducive to individual interactions.

Emphasis

Hands on with privilege escalation techniques within the JavaScript implementations, JIT optimizers and rendering components.

Prerequisites

  • Computer with the ability to run a VirtualBox image (x64, recommended 1GB+ memory)
  • Some familiarity with: IDA Pro, Python, C/C++.
  • ASM fluency.
  • Installed and usable copy of IDA Pro 6.1+, VirtualBox, Python 2.7+.

Course Information

Attendance will be limited to 18 students per course.

Cost: $5000 USD per attendee

Dates:  November 14-17, 2023

Location:  the London, UK area

Syllabus

  • JavaScript Crash Course
  • Browsers Overview
    • Architecture
    • Renderer
    • Sandbox
  • Deep Dive into JavaScript Engines and JIT Compilation
    • Detailed understanding of JavaScript engines and JIT compilation
    • Differences between major JavaScript engines (V8, SpiderMonkey, JavaScriptCore)
  • Introduction to Browser Exploitation
    • Technical aspects and techniques of browser exploitation
    • Focus on JavaScript engine and JIT vulnerabilities
  • Chrome ArrayShift case study
  • Safari NaN Speculation case study
  • JIT Compilers in depth
    • Chrome/V8 Turbofan
    • Firefox/SpiderMonkey Ion
    • Safari/JavaScriptCore DFG/FTL
  • Chrome ArrayShift case study exploitation
    • Object in-memory layout
  • Types of Arrays
  • Chrome ArrayShift case study exploitation continued
    • Garbage collection
  • Running shellcode
    • Common avenues
    • Mitigations
  • Browser Fuzzing and Bug Hunting
    • Introduction to fuzzing
    • Pros and cons of fuzzing
    • Fuzzing techniques for browsers
    • “Smarter” fuzzing
  • Current landscape
  • Hands-on exercises throughout the course
    • Understanding the environment and getting up to speed
    • Analysis and exploitation of a vulnerability

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