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Sandbox Escape

Abusing search permissions on Docker directories for privilege escalation

A privilege escalation vulnerability was discovered in Docker environments where the /var/lib/docker directory has search permissions for other users. Low-privileged attackers can access container filesystems by exploiting these permissions. By modifying container startup scripts and leveraging host reboot capabilities, attackers can potentially gain root access on the host system.

  • 27 Aug 2020

Exploiting CVE-2019-17026 - A Firefox JIT Bug

A detailed technical analysis of a critical vulnerability (CVE-2019-17026) in Firefox's SpiderMonkey JIT compiler was presented. The vulnerability involves type confusion and bounds check elimination in the IonMonkey JIT compilation process. The article explores how carefully crafted JavaScript can exploit interactions between multiple compilation chains to bypass JIT compiler safeguards and potentially execute arbitrary code.

  • 3 Jul 2020

Helping root out of the container

A container breakout technique exploits AF_LOCAL sockets to smuggle file descriptors into a container. By passing a file descriptor for the root directory, a root user within the container can modify files outside its mount namespace. This attack demonstrates how root access in a container can compromise intended security isolation boundaries.

  • 22 Feb 2019

3D Accelerated Exploitation

The presentation explores the 3D Acceleration feature in VirtualBox as a rich vulnerability research target. Open-source accessibility makes VirtualBox attractive for novice security researchers. The talk discusses exploitation primitives within 3D Acceleration that could potentially enable virtual machine escape without traditional shellcode execution.

Corrupting Memory In Microsoft Office Protected-View Sandbox

This presentation explores vulnerabilities in Microsoft Office's Protected-View sandbox through fuzzing its Inter-Process Communication (IPC) attack surface. Two critical CVEs were discovered targeting the reduced functionality sandbox environment. The talk details the methodology for generating test cases and analyzing potential security weaknesses in Protected-View.

MWR Labs Pwn2Own 2013 Write-up - Kernel Exploit

A kernel pool overflow vulnerability in Windows 7's Win32k system was demonstrated at Pwn2Own 2013. The exploit involved manipulating message buffer allocations to corrupt kernel memory structures. By carefully controlling message handling and window object properties, kernel-mode code execution was achieved, enabling a sandbox escape in Google Chrome.

MWR Labs Pwn2Own 2013 Write-up - Webkit Exploit

A detailed technical write-up of a WebKit exploit demonstrated at Pwn2Own 2013 describes a type confusion vulnerability in SVG document handling. The exploit leveraged the ability to cast non-SVG elements to SVG elements, enabling precise memory manipulation and control. By chaining multiple exploit stages, the vulnerability allowed leaking pointers, calculating memory addresses, and ultimately achieving code execution in the browser.

Pwn2Own at CanSecWest 2013

MWR Labs demonstrated a full sandbox bypass exploit against Google Chrome at Pwn2Own 2013. The exploit leveraged vulnerabilities to gain code execution in the renderer process and bypass ASLR and DEP protection mechanisms. Memory address leakage techniques were used to execute arbitrary commands outside the browser sandbox.

Building Android Sandcastles in Android's Sandbox

This paper examines Android's sandbox architecture and security vulnerabilities beyond traditional kernel-level exploits. The study shifts focus to analyzing systemic and third-party application security risks in the Android ecosystem. The research explores potential security weaknesses in Android's application isolation and sandbox implementation.