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High-Severity Linux Sudo Flaw Allows Users to Gain Root Privileges

High-Severity Linux Sudo Flaw Allows Users to Gain Root Privileges
Jun 01, 2017
A high-severity vulnerability has been reported in Linux that could be exploited by a low privilege attacker to gain full root access on an affected system. The vulnerability, identified as CVE-2017-1000367, was discovered by researchers at Qualys Security in Sudo's "get_process_ttyname()" function for Linux that could allow a user with Sudo privileges to run commands as root or elevate privileges to root. Sudo, stands for "superuser do!," is a program for Linux and UNIX operating systems that lets standard users run specific commands as a superuser (aka root user), such as adding users or performing system updates. The flaw actually resides in the way Sudo parsed "tty" information from the process status file in the proc filesystem. On Linux machines, sudo parses the /proc/[pid]/stat file in order to determine the device number of the process's tty from field 7 (tty_nr), Qualys Security explains in its advisory . Although the fields in t

Microsoft Brings Ubuntu, Suse, and Fedora Linux to Windows Store

Microsoft Brings Ubuntu, Suse, and Fedora Linux to Windows Store
May 12, 2017
Microsoft has been expressing its love for Linux and Open Source for almost three years now, and this love is embracing as time passes. Just last year, Microsoft made headlines by building support for the Bash shell and Ubuntu Linux binaries into Windows 10, allowing users to run limited instances of Linux directly on top of the OS without installing any virtual machine, as well as developers to run command-line tools while building apps. Now, Microsoft has announced at its Build developer conference in Seattle that three different flavors of the free Linux operating system are coming to the company's app store, so its users can run Windows and Linux apps side-by-side. Yes, it's no joke. Three versions of Linux distributions – Ubuntu, Fedora, and SUSE – are coming to the Windows Store. Now, you'll soon be able to install these Linux operating systems on your Windows device just like any other app. While Ubuntu is already available on the Windows Store for a

Making Sense of Operational Technology Attacks: The Past, Present, and Future

Making Sense of Operational Technology Attacks: The Past, Present, and Future
Mar 21, 2024Operational Technology / SCADA Security
When you read reports about cyber-attacks affecting operational technology (OT), it's easy to get caught up in the hype and assume every single one is sophisticated. But are OT environments all over the world really besieged by a constant barrage of complex cyber-attacks? Answering that would require breaking down the different types of OT cyber-attacks and then looking back on all the historical attacks to see how those types compare.  The Types of OT Cyber-Attacks Over the past few decades, there has been a growing awareness of the need for improved cybersecurity practices in IT's lesser-known counterpart, OT. In fact, the lines of what constitutes a cyber-attack on OT have never been well defined, and if anything, they have further blurred over time. Therefore, we'd like to begin this post with a discussion around the ways in which cyber-attacks can either target or just simply impact OT, and why it might be important for us to make the distinction going forward. Figure 1 The Pu

Hacker Who Used Linux Botnet to Send Millions of Spam Emails Pleads Guilty

Hacker Who Used Linux Botnet to Send Millions of Spam Emails Pleads Guilty
Mar 29, 2017
A Russian man accused of infecting tens of thousands of computer servers worldwide to generate millions in illicit profit has finally entered a guilty plea in the United States and is going to face sentencing in August. Maxim Senakh, 41, of Velikii Novgorod, Russia, pleaded guilty in a US federal court on Tuesday for his role in the development and maintenance of the infamous Linux botnet known as Ebury that siphoned millions of dollars from victims worldwide. Senakh, who was detained by Finland in August 2015 and extradition to the US in January 2016, admitted to installing Ebury malware on computer servers worldwide, including thousands in the United States. First spotted in 2011, Ebury is an SSH backdoor Trojan for Linux and Unix-style operating systems, like FreeBSD or Solaris, which infected more than 500,000 computers and 25,000 dedicated servers in a worldwide malware campaign called ' Operation Windigo .' Ebury backdoor gives attackers full shell control of

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THN Deal: Complete Linux Certification Training (Save 97%)

THN Deal: Complete Linux Certification Training (Save 97%)
Mar 01, 2017
If you are also searching for the answers to what skills are needed for a job in cyber security, you should know that this varies widely based upon the responsibilities of a particular role, the type of company you want to work with, and especially on it's IT architect. However, Linux is the most required skills in information technology and cyber security, as Linux are everywhere! Whether you know it or not you are already using Linux every day – when you Google, you use Linux; when you buy metro tickets, you use Linux; It powers your smart devices; most airplane or automobile entertainment systems are also running on Linux; even your Android phone is Linux. Moreover, nearly all of the hacking and penetration testing tools are developed specifically for Linux. In fact, one of the popular operating systems of hackers, KALI, is also a Linux distro that comes with over 300 tools for penetration testing, forensics, hacking and reverse engineering. So, due to the rapid growth of Li

KasperskyOS — Secure Operating System released for IoT and Embedded Systems

KasperskyOS — Secure Operating System released for IoT and Embedded Systems
Feb 21, 2017
Russian cyber security and antivirus vendor Kaspersky Lab has made available the much awaited KasperskyOS , a secure-by-design operating system based on Microkernel architecture which is specially designed for network devices, industrial control systems and the Internet of Things. The operating system is not made for your average home PC; instead, it is meant to protect industrial systems and embedded devices from cyber attacks by preventing any third-party or malicious code from executing. Kaspersky Lab CEO Eugene Kaspersky confirmed the rumors of a new operating system on his official blog published on Monday, saying this project under the codename 11-11 has been in the works for 14 years and has been designed from scratch. The reason behind developing KasperskyOS is simple: Growing Internet-of-Things and embedded devices in industrial control systems (ICS) to power critical infrastructure. It's quite easy for most companies to get rid of the virus-infected computer,

North Korea's Linux-based Red Star OS can be Hacked Remotely with just a Link

North Korea's Linux-based Red Star OS can be Hacked Remotely with just a Link
Dec 06, 2016
North Korea's own homegrown computer operating system, that's supposed to be fully hacker proof and more secure than foreign OS, like Microsoft's Windows, can easily be hacked remotely. A group of hackers managed to break into Red Star OS — North Korea's government sanctioned Linux-based OS — using just a link. Red Star OS is North Korea's own homegrown OS that looks remarkably just like Apple's OS X and gives North Korean authorities more control over the computers, providing not only security but also spying tools that help track files in a way that if the government wants, every bit of user's data can be traced easily. According to the information security company Hacker House , Red Star OS contains a critical vulnerability that makes it possible for hackers to gain remote access to any PC running North Korea's OS just by tricking victims into opening a hyperlink. The latest version of Red Star OS ships with a Firefox-based web browser cal

Microsoft Joins The Linux Foundation — Turns Love Affair Into a Relationship

Microsoft Joins The Linux Foundation — Turns Love Affair Into a Relationship
Nov 16, 2016
You won't believe your eyes while reading this, but this is true. Microsoft just joined the Linux Foundation as a high-paying Platinum member. Microsoft's love with open source community is embracing as time passes. At its first Connect event in 2013, the company launched Visual Studio 2013. A year later, Microsoft open sourced .NET, and last year, it open sourced the Visual Studio Code Editor, as well. Not just that, Microsoft partnered with Canonical to bring Ubuntu on Windows 10 , worked with FreeBSD to develop a Virtual Machine image for its Azure cloud , and chosen Ubuntu as the OS for its Cloud-based Big Data services. And the big news for this year is… At its 2016 Connect developer event in New York today, Microsoft announced that the company is joining the Linux Foundation as a Platinum member – the highest level of membership, which costs $500,000 annually. Besides this, Microsoft also announced that tech giant Google has also joined on with the indepen

New IoT Botnet Malware Discovered; Infecting More Devices Worldwide

New IoT Botnet Malware Discovered; Infecting More Devices Worldwide
Nov 01, 2016
The whole world is still dealing with the Mirai IoT Botnet that caused vast internet outage last Friday by launching massive distributed denial of service (DDoS) attacks against the DNS provider Dyn, and researchers have found another nasty IoT botnet. Security researchers at MalwareMustDie have discovered a new malware family designed to turn Linux-based insecure Internet of Things (IoT) devices into a botnet to carry out massive DDoS attacks. Dubbed Linux/IRCTelnet , the nasty malware is written in C++ and, just like Mirai malware , relies on default hard-coded passwords in an effort to infect vulnerable Linux-based IoT devices. The IRCTelnet malware works by brute-forcing a device's Telnet ports, infecting the device's operating system, and then adding it to a botnet network which is controlled through IRC (Internet Relay Chat) – an application layer protocol that enables communication in the form of text. So, every infected bot (IoT device) connects to a mali

Dirty COW — Critical Linux Kernel Flaw Being Exploited in the Wild

Dirty COW — Critical Linux Kernel Flaw Being Exploited in the Wild
Oct 21, 2016
A nine-year-old critical vulnerability has been discovered in virtually all versions of the Linux operating system and is actively being exploited in the wild. Dubbed " Dirty COW ," the Linux kernel security flaw (CVE-2016-5195) is a mere privilege-escalation vulnerability, but researchers are taking it extremely seriously due to many reasons. First, it's very easy to develop exploits that work reliably. Secondly, the Dirty COW flaw exists in a section of the Linux kernel, which is a part of virtually every distro of the open-source operating system, including RedHat, Debian, and Ubuntu, released for almost a decade. And most importantly, the researchers have discovered attack code that indicates the Dirty COW vulnerability is being actively exploited in the wild. Dirty COW potentially allows any installed malicious app to gain administrative (root-level) access to a device and completely hijack it within just 5 seconds. Earlier this week, Linus Torvalds admi

Warning — You Can't Install Linux On Microsoft Signature Edition PCs from Lenovo

Warning — You Can't Install Linux On Microsoft Signature Edition PCs from Lenovo
Sep 21, 2016
In past few months, Microsoft opened the source code of a lot of its projects, convincing people that the company loves Linux . But a new report shows that Microsoft is not really a big supporter of Linux. Microsoft has banned Linux on some Windows 10 powered Signature Edition PCs, which provides the cleanest Windows experience on the market. Signature Edition PCs are different from other systems because it is carefully and meticulously configured by Microsoft to run Windows 10 with no bloatware, paid promotional web shortcuts, or other pre-installed apps, for providing better performance. But besides bloatware and other pre-installed apps, Microsoft won't allow you to install Linux (or any operating system) on it. This news is not a rumor as a Reddit user BaronHK reported that he found it impossible to install Linux on the Signature Edition Lenovo Yoga 900 ISK2 UltraBook because Microsoft has locked the SSD in a proprietary RAID mode that can only be read by Window

Hacker Who Hacked Official Linux Kernel Website Arrested in Florida

Hacker Who Hacked Official Linux Kernel Website Arrested in Florida
Sep 03, 2016
Around five years after unknown hackers gained unauthorized access to multiple kernel.org servers used to maintain and distribute the Linux operating system kernel, police have arrested a South Florida computer programmer for carrying out the attack. Donald Ryan Austin , a 27-year-old programmer from of El Portal, Florida, was charged Thursday with hacking servers belonging to the Linux Kernel Organization ( kernel.org ) and the Linux Foundation in 2011, the Department of Justice announced on Thursday. The Linux Kernel Organization runs kernel.org servers for distributing the Linux operating system kernel, which is the heart of the operating system, whereas the Linux Foundation is a separate group that supports kernel.org. According to an indictment [ PDF ] unsealed by federal prosecutors on Monday, Austin managed to steal login credentials of one of the Linux Kernel Organization system administrators in 2011 and used them to install a hard-to-detect malware backdoor, dubbe

Happy Birthday! LINUX Turns 25 Years Old Today

Happy Birthday! LINUX Turns 25 Years Old Today
Aug 24, 2016
Linux has turned 25! Dear all, today is August 25, 2016, and it is time for the celebration, as it's the 25th Anniversary of the Linux project, announced by its creator, Finnish programmer Linus Torvalds , on August 25, 1991. Who can forget one of the most famous messages in the computing world posted by Torvalds exactly 25 years ago today, on 25 August 1991: Hello everybody out there using minix - I'm doing a (free) operating system (just a hobby, won't be big and professional like gnu) for 386(486) AT clones. This has been brewing since april, and is starting to get ready. I'd like any feedback on things people like/dislike in minix, as my OS resembles it somewhat. Since its birth, Linux has become the largest shared technology on the planet and has changed the world in more ways than one can imagine. While not initially designed to be portable, Linux is one of the most widely ported operating system kernels, which runs on a vast range of systems from co

Linux TCP Flaw allows Hackers to Hijack Internet Traffic and Inject Malware Remotely

Linux TCP Flaw allows Hackers to Hijack Internet Traffic and Inject Malware Remotely
Aug 11, 2016
If you are using the Internet, there are the possibilities that you are open to attack. The Transmission Control Protocol (TCP) implementation in all Linux systems deployed since 2012 ( version 3.6 and above of the Linux kernel ) poses a serious threat to Internet users, whether or not they use Linux directly. This issue is troubling because Linux is used widely across the Internet, from web servers to Android smartphones, tablets, and smart TVs. Researchers have uncovered a serious Internet flaw, which if exploited, could allow attackers to terminate or inject malware into unencrypted communication between any two vulnerable machines on the Internet. The vulnerability could also be used to forcefully terminate HTTPS encrypted connections and downgrade the privacy of secure connections, as well as also threatens anonymity of Tor users by routing them to certain malicious relays. The flaw actually resides in the design and implementation of the Request for Comments: 5961 ( RF

Ubuntu Linux Forum Hacked! Once Again

Ubuntu Linux Forum Hacked! Once Again
Jul 15, 2016
No software is immune to being Hacked! Not even Linux. The Ubuntu online forums have been hacked, and data belonging to over 2 Million users have been compromised, Canonical just announced. The compromised users' data include their IP addresses, usernames, and email addresses, according to the company, who failed to apply a patch to secure its users' data. However, users should keep in mind that the hack did not affect the Ubuntu operating system, or it was not due to a vulnerability or weakness in the OS. Instead, the breach only affected the Ubuntu online forums that people use to discuss the OS, said BetaNews, who initially reported the news. "There has been a security breach on the Ubuntu Forums site," Jane Silber, Chief Executive Officer at Canonical wrote in a blog post . "We take information security and user privacy very seriously, follow a strict set of security practices and this incident has triggered a thorough investigation." "C

How to run Graphical Ubuntu Linux from Bash Shell in Windows 10

How to run Graphical Ubuntu Linux from Bash Shell in Windows 10
Jul 12, 2016
You might be aware of Microsoft and Canonical's partnership to integrate " Bash on Ubuntu on Windows 10 ," which is typically a non-graphical Ubuntu running over Windows Subsystem for Linux . Windows 10 doesn't officially support graphical Linux desktop applications. But, now we have noticed a very interesting ticket titled "Run Any Desktop Environment in WSL" raised at Github  repository, in which a user who goes by name Guerra24 has managed to run the graphical version of Ubuntu Linux, i.e. Ubuntu Unity on Windows 10. It's not " Microsoft Linux ." BASH or Bourne Again Shell is capable of handling advanced command line functionalities. Microsoft has provided support for Bash on Windows 10 as an expansion of its command-line tool family, so don't get confused. The Bash on Windows 10 feature is designed only for developers who want to run Linux terminal utilities without any OS dependencies. However, this feature downloads and installs

Subgraph OS — Secure Linux Operating System for Non-Technical Users

Subgraph OS — Secure Linux Operating System for Non-Technical Users
Mar 04, 2016
Information security and privacy are consistently hot topics after Edward Snowden revelations of NSA's global surveillance that brought the world's attention towards data protection and encryption as never before. Moreover, just days after Windows 10 's successful launch last summer, we saw various default settings in the Microsoft's newest OS that compromise users' privacy , making a large number of geeks, as well as regular users, migrate to Linux. However, the problem is that majority of users are not friendly to the Linux environment. They don't know how to configure their machine with right privacy and security settings, which makes them still open to hacking and surveillance. However, this gaping hole can be filled with a  Debian-based  Security-focused Linux operating system called Subgraph OS: A key solution to your Privacy Fear. Subgraph OS is a feather weighted Linux flavor that aims to combat hacking attacks easier, even on fai

Warning — Linux Mint Website Hacked and ISOs replaced with Backdoored Operating System

Warning — Linux Mint Website Hacked and ISOs replaced with Backdoored Operating System
Feb 21, 2016
Are you also the one who downloaded Linux Mint on February 20th? You may have been Infected! Linux Mint is one of the best and popular Linux distros available today, but if you have downloaded and installed the operating system recently you might have done so using a malicious ISO image. Here's why: Last night, Some unknown hacker or group of hackers had managed to hack into the Linux Mint website and replaced the download links on the site that pointed to one of their servers offering a malicious ISO images for the Linux Mint 17.3 Cinnamon Edition . "Hackers made a modified Linux Mint ISO, with a backdoor in it, and managed to hack our website to point to it," the head of Linux Mint project Clement Lefebvre said in a surprising announcement dated February 21, 2016. Who are affected? As far as the Linux Mint team knows, the issue only affects the one edition, and that is Linux Mint 17.3 Cinnamon edition. The situation happened last night, s
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