The Hacker News Logo
Subscribe to Newsletter

The Hacker News - Cybersecurity News and Analysis: Ubuntu

A New 'Arbitrary File Copy' Flaw Affects ProFTPD Powered FTP Servers

A New 'Arbitrary File Copy' Flaw Affects ProFTPD Powered FTP Servers
July 23, 2019Swati Khandelwal
A German security researcher has publicly disclosed details of a serious vulnerability in one of the most popular FTP server applications, which is currently being used by more than one million servers worldwide. The vulnerable software in question is ProFTPD , an open source FTP server used by a large number of popular businesses and websites including SourceForge, Samba and Slackware, and comes pre-installed with many Linux and Unix distributions, like Debian. Discovered by Tobias Mädel , the vulnerability resides in the mod_copy module of the ProFTPD application, a component that allows users to copy files/directories from one place to another on a server without having to transfer the data to the client and back. According to Mädel, an incorrect access control issue in the mod_copy module could be exploited by an authenticated user to unauthorizedly copy any file on a specific location of the vulnerable FTP server where the user is otherwise not allowed to write a file.

Ubuntu-Maker Canonical's GitHub Account Gets Hacked

Ubuntu-Maker Canonical’s GitHub Account Gets Hacked
July 07, 2019Mohit Kumar
An unknown hacker yesterday successfully managed to hack into the official GitHub account of Canonical, the company behind the Ubuntu Linux project and created 11 new empty repositories . It appears that the cyberattack was, fortunately, just a "loud" defacement attempt rather than a "silent" sophisticated supply-chain attack that could have been abused to distribute modified malicious versions of the open-source Canonical software. In a statement, David from Canonical confirmed that attacker(s) used a Canonical owned GitHub account whose credentials were compromised to unauthorizedly access Canonical's Github account. "We can confirm that on 2019-07-06 there was a Canonical owned account on GitHub whose credentials were compromised and used to create repositories and issues among other activities," David said. "Canonical has removed the compromised account from the Canonical organization in GitHub and is still investigating the extent o

Snapd Flaw Lets Attackers Gain Root Access On Linux Systems

Snapd Flaw Lets Attackers Gain Root Access On Linux Systems
February 13, 2019Mohit Kumar
Ubuntu and some other Linux distributions suffer from a severe privilege escalation vulnerability that could allow a local attacker or a malicious program to obtain root privileges and total control over the targeted system. Dubbed " Dirty_Sock " and identified as CVE-2019-7304 , the vulnerability was discovered by security researcher Chris Moberly, who privately disclosed it to Canonical, the maker of Ubuntu, late last month. The vulnerability resides in the REST API for snapd service , a universal Linux packaging system that makes an application compatible for various Linux distributions without requiring any modification. Built by Canonical, snapd comes by default installed on all versions of Ubuntu and also used by other Linux distributions, including Debian, OpenSUSE, Arch Linux, Solus, and Fedora. Snap packages are basically applications compressed together with their dependencies that also includes instructions on how to run and interact with other software o

Warning! Unprivileged Linux Users With UID > INT_MAX Can Execute Any Command

Warning! Unprivileged Linux Users With UID > INT_MAX Can Execute Any Command
December 06, 2018Mohit Kumar
Hold tight, this may blow your mind… A low-privileged user account on most Linux operating systems with UID value anything greater than 2147483647 can execute any systemctl command unauthorizedly—thanks to a newly discovered vulnerability. The reported vulnerability actually resides in PolicyKit (also known as polkit)—an application-level toolkit for Unix-like operating systems that defines policies, handles system-wide privileges and provides a way for non-privileged processes to communicate with privileged ones, such as "sudo," that does not grant root permission to an entire process. The issue, tracked as CVE-2018-19788 , impacts PolicyKit version 0.115 which comes pre-installed on most popular Linux distributions, including Red Hat , Debian ,  Ubuntu , and CentOS. The vulnerability exists due to PolicyKit's improper validation of permission requests for any low-privileged user with UID greater than INT_MAX. Where, INT_MAX is a constant in computer progra

New Privilege Escalation Flaw Affects Most Linux Distributions

New Privilege Escalation Flaw Affects Most Linux Distributions
October 26, 2018Mohit Kumar
An Indian security researcher has discovered a highly critical flaw in X.Org Server package that impacts OpenBSD and most Linux distributions, including Debian, Ubuntu, CentOS, Red Hat, and Fedora. Xorg X server is a popular open-source implementation of the X11 system (display server) that offers a graphical environment to a wider range of hardware and OS platforms. It serves as an intermediary between client and user applications to manage graphical displays. According to a blog post published by software security engineer Narendra Shinde , Xorg X server doesn't correctly handle and validate arguments for at least two command-line parameters, allowing a low-privileged user to execute malicious code and overwrite any file—including files owned by privileged users like root. The flaw, tracked as CVE-2018-14665 , was introduced in X.Org server 1.19.0 package that remained undetected for almost two years and could have been exploited by a local attacker on the terminal or vi

Google Hacker Discloses New Linux Kernel Vulnerability and PoC Exploit

Google Hacker Discloses New Linux Kernel Vulnerability and PoC Exploit
September 28, 2018Mohit Kumar
A cybersecurity researcher with Google Project Zero has released the details, and a proof-of-concept (PoC) exploit for a high severity vulnerability that exists in Linux kernel since kernel version 3.16 through 4.18.8. Discovered by white hat hacker Jann Horn, the kernel vulnerability (CVE-2018-17182) is a cache invalidation bug in the Linux memory management subsystem that leads to use-after-free vulnerability, which if exploited, could allow an attacker to gain root privileges on the targeted system. The use-after-free (UAF) vulnerabilities are a class of memory corruption bug that can be exploited by unprivileged users to corrupt or alter data in memory, enabling them to cause a denial of service (system crash) or escalate privileges to gain administrative access on a system. Linux Kernel Exploit Takes an Hour to Gain Root Access However, Horn says his PoC Linux kernel exploit made available to the public "takes about an hour to run before popping a root shell."

Microsoft Releases PowerShell Core for Linux as a Snap Package

Microsoft Releases PowerShell Core for Linux as a Snap Package
July 20, 2018Mohit Kumar
Microsoft's love for Linux continues… Microsoft has released its command-line shell and scripting language PowerShell Core for Linux operating system as a Snap package, making it easier for Linux users to install Microsoft PowerShell on their system. Yes, you heard me right. Microsoft has made PowerShell Core available to the Ubuntu Snap Store as a Snap application. PowerShell Core is a cross-platform version of Windows PowerShell that is already available for Windows, macOS, and Linux OS and has been designed for sysadmins who manage assets in hybrid clouds and heterogeneous environments. Snap is a universal Linux packaging system, built by Canonical for the Ubuntu operating system, which makes an application compatible for all major Linux distributions without requiring any modification. A Snap package is basically an application compressed together with its dependencies and also includes instructions on how to run and interact with other software on various Linu

Ubuntu Linux for Windows 10 Released — Yes, You Read it Right

Ubuntu Linux for Windows 10 Released — Yes, You Read it Right
July 14, 2017Mohit Kumar
Windows and Linux in the same line? Yes, you heard that right... and that too, on the same computer and within the same operating system. Two months ago, Microsoft announced its plans to let its users install three different flavours of the Linux operating system – Ubuntu , Fedora , and SUSE – directly through their Windows Store, allowing them to run Windows and Linux apps side-by-side. Now, downloading an entire operating system has just become as easy as downloading an application with the availability of popular Linux distro 'Ubuntu' in the Windows App Store . However, unlike a conventional Ubuntu installation, this Ubuntu version runs in a sandboxed alongside Windows 10 with limited interaction with the operating system and is focused on running regular command-line utilities like bash or SSH as a standalone installation through an Ubuntu Terminal. For now, Ubuntu is currently only available to Windows 10 Insiders users and would be made available to the pub

Your Linux Machine Can Be Hacked Remotely With Just A Malicious DNS Response

Your Linux Machine Can Be Hacked Remotely With Just A Malicious DNS Response
June 29, 2017Swati Khandelwal
A critical vulnerability has been discovered in Systemd , the popular init system and service manager for Linux operating systems, that could allow remote attackers to potentially trigger a buffer overflow to execute malicious code on the targeted machines via a DNS response. The vulnerability, designated as CVE-2017-9445 , actually resides in the ' dns_packet_new ' function of 'systemd-resolved,' a DNS response handler component that provides network name resolution to local applications. According to an advisory published Tuesday, a specially crafted malicious DNS response can crash 'systemd-resolved' program remotely when the system tries to lookup for a hostname on an attacker-controlled DNS service. Eventually, large DNS response overflows the buffer, allowing an attacker to overwrite the memory which leads to remote code execution. This means the attackers can remotely run any malware on the targeted system or server via their evil DNS service

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

Microsoft Brings Ubuntu, Suse, and Fedora Linux to Windows Store
May 12, 2017Swati Khandelwal
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

Ubuntu's Crash Report Tool Allows Remote Code Execution

Ubuntu’s Crash Report Tool Allows Remote Code Execution
December 16, 2016Swati Khandelwal
No software is immune to being Hacked! Not even Linux. A security researcher has discovered a critical vulnerability in Ubuntu Linux operating system that would allow an attacker to remotely compromise a target computer using a malicious file. The vulnerability affects all default Ubuntu Linux installations versions 12.10 (Quantal) and later. Researcher Donncha O'Cearbhaill discovered the security bug which actually resides in the Apport crash reporting tool on Ubuntu. A successful exploit of this CrashDB code injection issue could allow an attacker to remotely execute arbitrary code on victim's machine. All an attacker needs is to trick the Ubuntu user into opening a maliciously booby-trapped crash file. This would inject malicious code in Ubuntu OS's crash file handler, which when parsed, executes arbitrary Python code. "The code first checks if the CrashDB field starts with { indicating the start of a Python dictionary," O'Cearbhaill explain

Happy Birthday! LINUX Turns 25 Years Old Today

Happy Birthday! LINUX Turns 25 Years Old Today
August 24, 2016Mohit Kumar
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

Ubuntu Linux Forum Hacked! Once Again

Ubuntu Linux Forum Hacked! Once Again
July 15, 2016Swati Khandelwal
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
July 12, 2016Mohit Kumar
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

Microsoft Chooses Ubuntu Linux for their Cloud-based Azure HDInsight Big Data Solution

Microsoft Chooses Ubuntu Linux for their Cloud-based Azure HDInsight Big Data Solution
September 30, 2015Khyati Jain
Earlier this month, Microsoft surprised us all with the announcement that they built a Linux kernel-based operating system, Azure Cloud Switch (ACS) , for developing software products for Network Devices. Now, Microsoft just announced that they have selected Ubuntu as the operating system for their Cloud-based Big Data services. Yes, Microsoft needs Linux. To expand its Azure Data Lake project, that makes Big Data processing and Analytics simpler and more accessible, Microsoft has partnered with Hortonworks and Canonical to launch " Azure HDInsight " for Linux users. Azure HDInsight is a Hadoop-based Big Data solution powered by Cloud that is now also available for Ubuntu, along with Windows OS. By offering both Windows and Linux clusters, Microsoft's fulfills its aim to enhance its own cross-platform aspirations that will accelerate a move towards Hybrid Cloud Computing . " The collaboration between Microsoft and Canonical to create the option to run Azur

Ubuntu Forums hacked; 2 million user's personal Information compromised

Ubuntu Forums hacked; 2 million user's personal Information compromised
July 21, 2013Mohit Kumar
Ubuntuforums.org , The popular Ubuntu Forums site, has posted a message on its index page, informing its near 2 million users that it has suffered a serious security breach. " There has been a security breach on the Ubuntu Forums, " reads the page. The site was defaced by hacker with Twitter handle " Sputn1k_ " and Unfortunately the attacker have gotten every user's local username, encrypted password, and email address from the Ubuntu Forums database. " The Canonical IS team is working hard as we speak to restore normal operations ." page said. Canonical advises users who have used their same forum password on other sites to change it immediately. " Ubuntu One, Launchpad and other Ubuntu/Canonical services are not affected by the breach, " company stated.

Canonical to create UbuntuKylin OS for Chinese users

Canonical to create UbuntuKylin OS for Chinese users
March 23, 2013Mohit Kumar
Canonical, the software company that manages and funds Ubuntu, announced to develop a new, open-source operating system customized especially for Chinese users called ' UbuntuKylin OS '. According to the BBC, Chinese government and Canonical partner to launch its home grown operating system. China signaled its intention to move away from its dependence on western software products i.e windows. Canonical staff and Chinese researchers will be working on the OS at a Beijing lab. China's Ministry of Industry and Information Technology will collaborate with Canonical to come up with Kylin to run on servers, aimed at websites, online shops, and hosting. The first version of Ubuntu Kylin is for the laptops and desktops. Therefore the Android dominates the Chinese market for a few more years. The Ubuntu Kylin is not for the mobile device because Canonical already has the Ubuntu Mobile OS. Future releases will also include integration with Baidu maps and shoppi

Pwn Pad Android device, Network hacking machine launched

Pwn Pad Android device, Network hacking machine launched
February 23, 2013Mohit Kumar
Security tools company Pwnie Express is making a network hacking focused Android device called the Pwn Pad . The device is based on the Google Nexus 7 specs, with USB-based Bluetooth, Ethernet and WiFi to gauge the security of a network beyond what Google's tablet can manage on its own. Pwn Pad  will be introduced at the RSA security conference in San Francisco next week and Pwnie Express is also releasing the Pwn Pad source code. This will allow hackers to download the software and get it up and running on other types of Android phones and tablets. " Every pen tester we know has a phone and a tablet and a laptop, but none of them has been able to do pen-testing from the tablet ," says Dave Porcello, Pwnie Express's CEO said to  wired . Most interesting part is that, first time the most popular wireless hacking tools like Aircrack-ng and Kismet introduced on an Android device.  The complete list of the tool available  in this suite are:  Wireless Tools: Aircrac

Canonical announces Ubuntu for smartphones

Canonical announces Ubuntu for smartphones
January 02, 2013Mohit Kumar
Soon, you would have the ability to carry a proper desktop operating system on your mobile phone. The firm behind the Ubuntu operating system, Canonical has announced a version of its software for smartphones. Instead of Android, now users will be able to run a very different Linux-based OS , the long-awaited mobile version of Ubuntu which comes with a new UI adapted for smaller screens. Best part, the operating system uses the drivers and kernels from Android, which means it can be easily installed on any smartphone currently running Google's OS, and also means manufacturers won't need to change any of their hardware to support the new OS. Benefits: A single OS for phone, PC and TV Fast, beautiful interface for entry level smartphones Unique PC experience on super phones when docked with a monitor, keyboard and mouse Ubuntu raises the bar for mobile UI design, for richer and more apps. Ubuntu's founder, Mark Shuttleworth, said he was in talks with manufacturers f

UbnHD2 : Ubuntu based Pentesting OS for Mobiles

UbnHD2 : Ubuntu based Pentesting OS for Mobiles
December 27, 2012Mohit Kumar
Most of the crazy readers always demand for some solution to turn their Android Smartphone into a Hacking Machine. There are various solutions, like installing some penetration testing android based tools like ANTI, dSploit, FaceNiff etc and also Installing ARM version of Backtrack OS. Today I found another solution for same purpose i.e.UbnHD2, a Ubuntu based Pen-testing OS. UbnHD2 is a security and pentest focused ubuntu/debian system that runs natively on the HTC HD2 phone. The product right now in beta versions and various options may not work. Installations steps are described by developer . Features Based on Ubuntu 10.10 Maverick Meerkat, Kernel 2.6.32.15 (ARM) X.org 7.5, GNOME 2.32.0 & Cairo-Dock 2.2.0 USB-OTG, 3G Network & WiFi (Drivers not included, proprietary, check XDA Forum) Perl 5.10.1, Ruby 4.5, Python 2.6.6 and more than 170 Pentest Tools preloaded Download From Sourceforge
Online Courses and Software

Sign up for cybersecurity newsletter and get latest news updates delivered straight to your inbox daily.