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Reviving the modprobe_path Technique: Overcoming search_binary_handler() Patch

A new approach to the Overwriting modprobe_path technique is introduced, addressing changes in the Upstream kernel that prevent triggering via dummy files.

Mar 15, 2025

Vulnerability Research

Four Ways to Protect Your Legacy with Theori’s Cybersecurity Solutions

Discover the top cybersecurity threats for 2025 and how Theori's innovative solutions can safeguard your business from evolving cyber risks and costly data breaches.

Feb 16, 2025

Web2 Security

DeepSeek Security, Privacy, and Governance: Hidden Risks in Open-Source AI

This post examines DeepSeek's security gaps, privacy practices, and open-source AI risks, offering practical advice for users and developers.

Feb 06, 2025

Security for AI

Finding Vulnerabilities in Firmware with Static Analysis Platform QueryX

QueryX, Theori’s program analysis platform, automates variant analysis for vulnerability detection. Learn how its taint analysis module uncovered CVE-2023-39471.

Nov 06, 2024

Vulnerability Research

Winning the AIxCC Qualification Round

Theori’s Cyber Reasoning System (CRS) “Robo Duck” not only cleared the bar to get us $2M and a spot at the AIxCC finals in 2025, it also got the first place among all the submissions in the highly competitive event.

Sep 23, 2024

AI for Security

Reviving the modprobe_path Technique: Overcoming search_binary_handler() Patch

A new approach to the Overwriting modprobe_path technique is introduced, addressing changes in the Upstream kernel that prevent triggering via dummy files.

Mar 15, 2025

Vulnerability Research

Four Ways to Protect Your Legacy with Theori’s Cybersecurity Solutions

Discover the top cybersecurity threats for 2025 and how Theori's innovative solutions can safeguard your business from evolving cyber risks and costly data breaches.

Feb 16, 2025

Web2 Security

DeepSeek Security, Privacy, and Governance: Hidden Risks in Open-Source AI

This post examines DeepSeek's security gaps, privacy practices, and open-source AI risks, offering practical advice for users and developers.

Feb 06, 2025

Security for AI

Finding Vulnerabilities in Firmware with Static Analysis Platform QueryX

QueryX, Theori’s program analysis platform, automates variant analysis for vulnerability detection. Learn how its taint analysis module uncovered CVE-2023-39471.

Nov 06, 2024

Vulnerability Research

Winning the AIxCC Qualification Round

Sep 23, 2024

AI for Security

Deep Dive into RCU Race Condition: Analysis of TCP-AO UAF (CVE-2024–27394)

CVE-2024-27394 is a TCP-AO Use-After-Free vulnerability caused by improper RCU API usage. Read the in-depth analysis and reliable triggering technique.

Sep 03, 2024

Vulnerability Research

A Deep Dive into the CoSoSys EndPoint Protector Exploit: Remote Code Execution

Four critical RCE vulnerabilities (CVE-2024-36072 to CVE-2024-36075) in CoSoSys Endpoint Protector were identified, allowing full server and client compromise. Read the full analysis.

Aug 29, 2024

Web2 Security

Chaining N-days to Compromise All: Part 6 — Windows Kernel LPE: Get SYSTEM

The final part of the N-day exploit series analyzes CVE-2023-36802, a privilege escalation vulnerability in mskssrv.sys, used to gain SYSTEM access on a VMware host.

May 21, 2024

Vulnerability Research

Chaining N-days to Compromise All: Part 5 — VMware Workstation Guest-to-Host Escape

CVE-2023-20869 was exploited to achieve arbitrary code execution on a VMware host from a guest system. Read the full technical analysis.

May 02, 2024

Vulnerability Research

Chaining N-days to Compromise All: Part 4 — VMware Workstation Information leakage

CVE-2023-34044, a variant of CVE-2023-20870, was exploited to extract critical information from a VMware host process. Read the in-depth analysis.

Apr 17, 2024

Vulnerability Research

Chaining N-days to Compromise All: Part 3 — Windows Driver LPE: Medium to System

CVE-2023-29360, a logic bug in the mskssrv.sys driver, was exploited to escalate privileges to SYSTEM in a 1-day full chain attack. Read the detailed breakdown.

Apr 08, 2024

Vulnerability Research

Chaining N-days to Compromise All: Part 2 — Windows Kernel LPE (a.k.a Chrome Sandbox Escape)

CVE-2023-21674, a Windows kernel UAF vulnerability, was used to escape the Chrome sandbox in a 1-day full chain exploit. Read the detailed analysis.

Mar 31, 2024

Vulnerability Research

Chaining N-days to Compromise All: Part 1 — Chrome Renderer RCE

This post begins our series on the 1-day exploit chain demoed on X, focusing on a Chrome renderer exploit, CVE-2023-3079, a type confusion bug in V8.

Mar 17, 2024

Vulnerability Research

Fermium-252 : The Cyber Threat Intelligence Database

Fermium-252 is a premier vulnerability intelligence platform providing real-time tracking of 1-day exploits, PoCs, and in-depth reports. Stay ahead of cyber threats with our expert analysis.

Mar 03, 2024

Vulnerability Research

A Deep Dive into V8 Sandbox Escape Technique Used in In-The-Wild Exploit

We bypassed the V8 sandbox using a raw pointer in WasmIndirectFunctionTable, enabling arbitrary write and code execution. Read our deep dive into the exploit.

Jan 25, 2024

Vulnerability Research

Exploiting Windows Kernel Wild Copy With User Fault Handling (CVE-2023–28218)

At Hexacon 2023, we presented our Windows kernel security research, uncovering CVE-2023-28218, a heap overflow in afd.sys. Read our exploit analysis and methodology.

Nov 09, 2023

Vulnerability Research

NEAT and NES Algorithms

We reverse-engineered NEAT and NES, two unpublished symmetric encryption algorithms from South Korea’s GPKI cryptography library. Read our analysis and implementations.

Apr 20, 2023

Vulnerability Research

Linux Kernel Exploit (CVE-2022–32250) with mqueue

We exploited CVE-2022-32250, a use-after-free vulnerability in Linux Netfilter, to achieve root on Ubuntu 22.04. Learn how we bypassed KASLR and modified modprobe_path.

Aug 23, 2022

Vulnerability Research

Binary-searching into CVMServer

While analyzing the patch for CVE-2021-30724, we discovered a new uninitialized memory vulnerability (CVE-2022-26721) in macOS's CVMServer. Read our exploitation insights.

Jun 16, 2022

Vulnerability Research

Exploiting Safari’s ANGLE Component

We discovered CVE-2022-26717, an exploitable bug in WebKit's WebGL component affecting Safari on macOS and iOS. Read our analysis and exploitation methodology.

May 17, 2022

Vulnerability Research

Patch Gapping a Safari Type Confusion

Safari 14.1 introduced AudioWorklets, but a newly patched type confusion bug left iOS versions vulnerable for weeks. We share our root cause analysis and exploit details.

May 24, 2021

Vulnerability Research

Compromising virtualization without attacking the hypervisor

Discover CVE-2020-27675 (XSA-331), a denial-of-service and potential out-of-bounds write vulnerability in the Xen paravirtualization driver, and learn how it can impact virtualization security.

Oct 20, 2020

Vulnerability Research

Cleanly Escaping the Chrome Sandbox

Learn how we discovered and exploited Issue 1062091, a use-after-free (UAF) vulnerability in Chrome and Chromium-based Edge, leading to a sandbox escape.

Apr 19, 2020

Vulnerability Research

Theori Secures Funding from Naver

Naver has invested in Theori, a leading cybersecurity firm known for consulting, training, and vulnerability assessment. Discover how this partnership strengthens global security and Theori’s future expansion plans.

Sep 03, 2018

Culture

Receiving NRSC-5

We have implemented an NRSC-5-C digital radio receiver and released it as open source on GitHub. Explore IBOC-based hybrid broadcasting and security research opportunities.

Jun 08, 2017

Vulnerability Research

Expanding to Korea

Theori is launching its first branch in South Korea in February 2017! Our Korea team will lead security research, drive innovation, and contribute to global security conferences.

Jan 15, 2017

Culture

Chakra JIT CFG Bypass

Learn how attackers bypassed Microsoft's Control Flow Guard (CFG) in Internet Explorer and Edge. We break down our PoC exploit, mitigation bypass, and the MS16-119 patch details.

Dec 13, 2016

Vulnerability Research

Patch Analysis of MS16–063 (jscript9.dll)

Microsoft's MS16-063 patch fixed a critical memory corruption vulnerability in jscript9.dll (TypedArray & DataView) affecting Internet Explorer. Read our analysis, vulnerability breakdown, and PoC exploit.

Jun 26, 2016

Vulnerability Research

Patch Analysis of CVE-2016–0189

Microsoft's MS16-051 patch addressed a critical Internet Explorer vulnerability (CVE-2016-0189) exploited in South Korea. Explore our in-depth analysis, patch breakdown, and proof-of-concept exploit.

Jun 21, 2016

Vulnerability Research

Introduction

Hello, everybody! We are glad to finally roll our website blog where we can share our findings!

May 09, 2016

Culture