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Security Leftovers

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  • Security updates for Wednesday

    Security updates have been issued by Fedora (CuraEngine, curl, firefox, php, and vim), openSUSE (apache2, pcre, salt, transfig, and util-linux), Oracle (.NET 5.0, curl, kernel, libsolv, python3, samba, and webkit2gtk3), and Red Hat (flatpak).

  • Finding and Fixing DOM-based XSS with Static Analysis – Attack & Defense

    Despite all the efforts of fixing Cross-Site Scripting (XSS) on the web, it continuously ranks as one of the most dangerous security issues in software.

    In particular, DOM-based XSS is gaining increasing relevance: DOM-based XSS is a form of XSS where the vulnerability resides completely in the client-side code (e.g., in JavaScript). Indeed, more and more web applications implement all of their UI code using fronted web technologies: Single Page Applications (SPAs) are more prone to this vulnerability, mainly because they are more JavaScript-heavy than other web applications. An XSS in Electron applications, however, has the potential to cause even more danger due to the system-level APIs available in the Electron framework (e.g., reading local files and executing programs).

    The following article will take a deeper look into Mozilla’s eslint-based tooling to detect and prevent DOM-based XSS and how it might be useful for your existing web applications. The eslint plugin was developed as part of our mitigations against injection attacks in the Firefox browser, for which the user interface is also written in HTML, JavaScript and CSS.

  • 'Trojan Source' a Threat to All Source Code, Languages | eSecurityPlanet

    Researchers have outlined a method that could be used by bad actors to push vulnerabilities into source code that are invisible to human code reviewers.

    In a paper released this week, two researchers at the University of Cambridge in the UK wrote that the method – which they dub “Trojan Source” – essentially can be leveraged against almost every programming language in use today and could be effective in supply-chain attacks similar to the one launched against SolarWinds last year.

  • Victory! U.S. blacklists NSO Group and Candiru - Access Now

    Today, the U.S. Government added NSO Group, Candiru, and two other foreign companies to the Entity List for engaging in activities contrary to the national security or foreign policy interests of the United States.

    While long overdue, Access Now applauds this announcement, and urges the European Union and other governments to implement similar restrictions on surveillance tech companies who facilitate human rights violations.

    “This is a huge win,” said Natalia Krapiva, Tech-Legal Counsel at Access Now. “NSO and Candiru like to brag that their spyware technologies are all about protecting public safety and national security. But here, we have the United States, a major power, coming out and saying these companies are violating not only human rights, but also U.S. national security.”

  • FBI Releases PIN on Attacks Using Significant Financial Events for Extortion

    The Federal Bureau of Investigation (FBI) has released a Private Industry Notification (PIN) on ransomware actors using significant financial events, such as mergers and acquisitions, to target and leverage victim companies.

    CISA encourages users and administrators to review Ransomware Actors Use Significant Financial Events and Stock Valuation to Facilitate Targeting and Extortion of Victims and apply the recommended mitigations.

  • DCOM abuse and lateral movement with Cobalt Strike | Pen Test Partners

    It is possible to bypass certain AVs by encoding executables containing payloads with tools such as Msfvenom. Alternatively, using tools such as Shellter or Veil to create custom Portable Executables (PE) capable of bypassing common anti-virus solutions. These tools also allow you to inject payloads into legitimate software to even better mask your malicious code from the AV.

    These tools can be successful at performing their task, however if one used the same binary several times there is a good chance it would be added to existing AV/EDR signature databases. Using websites like VirusTotal to test the detection rate of your executables will also likely speed up the process of your malware getting added to a AV signature database. In general, uploading binaries onto a target currently is a bit of an unnecessary risk, therefore I wanted to look into ways of performing lateral movement with malware that does not need to be transferred to the disk of the target.

    The great thing about Cobalt Strike is the option to execute .NET binaries in memory of the target (execute-assembly), without needing to transfer it. Following the same idea, I wanted to be able to transfer malware to the target, that would execute in memory and avoid the unnecessary triggering of AV by the fact that it is present on the disk. I came across a technique called reflective DLL injection and thought it was genius.

    Reflective DLL injection involved loading a .NET Dynamic Link Library (DLL) into the memory of the target. Common tooling such as powershell can be used to load the DLL and allows the execution of your choice of methods available within the DLL. This results in diskless malware execution. I liked the concept however, performing the preparation for such a task was slightly lengthy, therefore my programmer instincts kicked in and I thought why not create some automation.

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.