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Category — Virtualization software
RunC Flaw Lets Attackers Escape Linux Containers to Gain Root on Hosts

RunC Flaw Lets Attackers Escape Linux Containers to Gain Root on Hosts

Feb 12, 2019
A serious security vulnerability has been discovered in the core runC container code that affects several open-source container management systems, potentially allowing attackers to escape Linux container and obtain unauthorized, root-level access to the host operating system. The vulnerability, identified as  CVE-2019-5736 , was discovered by open source security researchers Adam Iwaniuk and Borys Popławski and publicly disclosed by Aleksa Sarai, a senior software engineer and runC maintainer at SUSE Linux GmbH on Monday. The flaw resides in runC—a lightweight low-level command-line tool for spawning and running containers, an operating-system-level virtualization method for running multiple isolated systems on a host using a single kernel. Originally created by Docker, runC is the default container run-time for Docker, Kubernetes, ContainerD, CRI-O, and other container-dependent programs, and is widely being used by major cloud hosting and server providers. runC Cont...
Unpatched VirtualBox Zero-Day Vulnerability and Exploit Released Online

Unpatched VirtualBox Zero-Day Vulnerability and Exploit Released Online

Nov 08, 2018
An independent exploit developer and vulnerability researcher has publicly disclosed a zero-day vulnerability in VirtualBox —a popular open source virtualization software developed by Oracle—that could allow a malicious program to escape virtual machine (guest OS) and execute code on the operating system of the host machine. The vulnerability occurs due to memory corruption issues and affects Intel PRO / 1000 MT Desktop (82540EM) network card (E1000) when the network mode is set to NAT (Network Address Translation). The flaw is independent of the type of operating system being used by the virtual and host machines because it resides in a shared code base. VirtualBox Zero-Day Exploit and Demo Video Released Sergey Zelenyuk published Wednesday a detailed technical explanation of the zero-day flaw on GitHub, which affects all current versions (5.2.20 and prior) of VirtualBox software and is present on the default Virtual Machine (VM) configuration. According to Zelenyuk, t...
What Is Attack Surface Management?

What Is Attack Surface Management?

Feb 03, 2025Attack Surface Management
Attack surfaces are growing faster than security teams can keep up – to stay ahead, you need to know what's exposed and where attackers are most likely to strike. With cloud adoption dramatically increasing the ease of exposing new systems and services to the internet, prioritizing threats and managing your attack surface from an attacker's perspective has never been more important. In this guide, we look at why attack surfaces are growing and how to monitor and manage them properly with  tools like Intruder . Let's dive in. What is your attack surface? First, it's important to understand what we mean when we talk about an attack surface. An attack surface is the sum of your digital assets that are 'reachable' by an attacker – whether they are secure or vulnerable, known or unknown, in active use or not. You can also have both internal and external attack surfaces - imagine for example a malicious email attachment landing in a colleague's inbox, vs a new FTP server being...
Foreshadow Attacks — 3 New Intel CPU Side-Channel Flaws Discovered

Foreshadow Attacks — 3 New Intel CPU Side-Channel Flaws Discovered

Aug 15, 2018
2018 has been quite a tough year for Intel. While the chip-maker giant is still dealing with Meltdown and Spectre processor vulnerabilities, yet another major speculative execution flaw has been revealed in Intel's Core and Xeon lines of processors that may leave users vulnerable to cyber-attacks. Dubbed Foreshadow , alternatively called L1 Terminal Fault or L1TF, the new attacks include three new speculative execution side-channel vulnerabilities affecting Intel processors. The Foreshadow attacks could allow a hacker or malicious application to gain access to the sensitive data stored in a computer's memory or third-party clouds, including files, encryption keys, pictures, or passwords. The three Foreshadow vulnerabilities have been categorized into two variants: 1.) Foreshadow Foreshadow ( PDF ) targets a new technology originally been designed to protect select code and users' data from disclosure or modification, even if the entire system falls under a...
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