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* Home * Cyber Crime * Cyber warfare * APT * Data Breach * Deep Web * Digital ID * Hacking * Hacktivism * Intelligence * Internet of Things * Laws and regulations * Malware * Mobile * Reports * Security * Social Networks * Terrorism * ICS-SCADA * EXTENDED COOKIE POLICY * Contact me MUST READ Headlines * Bumblebee, a new malware loader used by multiple crimeware threat actors * CISA published 2021 Top 15 most exploited software vulnerabilities * CloudFlare blocked a record HTTPs DDoS attack peaking at 15 rps * Russia-linked threat actors launched hundreds of cyberattacks on Ukraine * US Department of State offers $10M reward for info to locate six Russian Sandworm members * Linux Nimbuspwn flaws could allow attackers to deploy sophisticated threats * Home * Cyber Crime * Cyber warfare * APT * Data Breach * Deep Web * Digital ID * Hacking * Hacktivism * Intelligence * Internet of Things * Laws and regulations * Malware * Mobile * Reports * Security * Social Networks * Terrorism * ICS-SCADA * EXTENDED COOKIE POLICY * Contact me LINUX NIMBUSPWN FLAWS COULD ALLOW ATTACKERS TO DEPLOY SOPHISTICATED THREATS April 27, 2022 By Pierluigi Paganini Powered by pixfutureⓘ MICROSOFT DISCLOSED TWO LINUX PRIVILEGE ESCALATION FLAWS, COLLECTIVELY NAMED NIMBUSPWN, THAT COULD ALLOW CONDUCTING VARIOUS MALICIOUS ACTIVITIES. The Microsoft 365 Defender Research Team has discovered two Linux privilege escalation flaws (tracked as CVE-2022-29799 and CVE-2022-29800) called “Nimbuspwn,” which can be exploited by attackers to conduct various malicious activities, including the deployment of malware. Powered by pixfutureⓘ “The vulnerabilities can be chained together to gain root privileges on Linux systems, allowing attackers to deploy payloads, like a root backdoor, and perform other malicious actions via arbitrary root code execution.” reads the advisory published by Microsoft. The flaws can be exploited by attackers to achieve root access to the target systems and deploy by more sophisticated threats, such as ransomware. The flaws reside in the systemd component called networked-dispatcher, which is dispatcher daemon for systemd-networkd connection status changes. The review of the code flow for networkd-dispatcher revealed multiple security issues, including directory traversal, symlink race, and time-of-check-time-of-use race condition issues. The researchers started enumerating services that run as root and listen to messages on the System Bus, performing both code reviews and dynamic analysis. Chaining the issues, an attacker in control of a rogue D-Bus service that can send an arbitrary signal, can deploy backdoors on the compromised final touches. The researchers were able to develop their own exploit that runs an arbitrary script as root. The exploit also copies /bin/sh to the /tmp directory, sets /tmp/sh as a Set-UID (SUID) executable, and then invokes “/tmp/sh -p”. (the “-p” flag is necessary to force the shell to not drop privileges) Researchers recommend users of networkd-dispatcher to update their installs. “To address the specific vulnerabilities at play, Microsoft Defender for Endpoint’s endpoint detection and response (EDR) capabilities detect the directory traversal attack required to leverage Nimbuspwn.” concludes the post. > Please vote for Security Affairs as the best European Cybersecurity Blogger > Awards 2022 – VOTE FOR YOUR WINNERS > Vote for me in the sections “The Underdogs – Best Personal (non-commercial) > Security Blog” and “The Tech Whizz – Best Technical Blog” and others of your > choice. > To nominate, please > visit: https://docs.google.com/forms/d/e/1FAIpQLSfxxrxICiMZ9QM9iiPuMQIC-IoM-NpQMOsFZnJXrBQRYJGCOw/viewform > Follow me on Twitter: @securityaffairs and Facebook Pierluigi Paganini (SecurityAffairs – hacking, Nimbuspwn flaws) Powered by pixfutureⓘ Share this... Facebook Twitter Linkedin SHARE THIS: * Twitter * Print * LinkedIn * Facebook * More * * Tumblr * Pocket * * Hackinghacking newsinformation security newsIT Information SecurityLINUXNimbuspwnPierluigi PaganiniSecurity AffairsSecurity News -------------------------------------------------------------------------------- SHARE ON * * * * * * * PIERLUIGI PAGANINI Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer. Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US. Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines. Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”. -------------------------------------------------------------------------------- PREVIOUS ARTICLE Wind Turbine giant Deutsche Windtechnik hit by a professional Cyberattack NEXT ARTICLE US Department of State offers $10M reward for info to locate six Russian Sandworm members -------------------------------------------------------------------------------- YOU MIGHT ALSO LIKE BUMBLEBEE, A NEW MALWARE LOADER USED BY MULTIPLE CRIMEWARE THREAT ACTORS April 28, 2022 By Pierluigi Paganini CISA PUBLISHED 2021 TOP 15 MOST EXPLOITED SOFTWARE VULNERABILITIES April 28, 2022 By Pierluigi Paganini * SPONSORED CONTENT * * PIXFUTURE * * DIGGING THE DEEP WEB: EXPLORING THE DARK SIDE OF THE WEB * CENTER FOR CYBER SECURITY AND INTERNATIONAL RELATIONS STUDIES * SUBSCRIBE SECURITY AFFAIRS NEWSLETTER * SECURITYAFFAIRS AWARDED AS BEST EUROPEAN CYBERSECURITY TECH BLOG AT EUROPEAN CYBERSECURITY BLOGGER AWARDS More Story WIND TURBINE GIANT DEUTSCHE WINDTECHNIK HIT BY A PROFESSIONAL CYBERATTACK The German wind turbine giant Deutsche Windtechnik was hit by a targeted cyberattack earlier this month. German wind... Copyright 2021 Security Affairs by Pierluigi Paganini All Right Reserved. Back to top * Home * Cyber Crime * Cyber warfare * APT * Data Breach * Deep Web * Digital ID * Hacking * Hacktivism * Intelligence * Internet of Things * Laws and regulations * Malware * Mobile * Reports * Security * Social Networks * Terrorism * ICS-SCADA * EXTENDED COOKIE POLICY * Contact me This site uses cookies, including for analytics, personalization, and advertising purposes. For more information or to change your cookie settings, click here. If you continue to browse this site without changing your cookie settings, you agree to this use. Accept Read More Privacy and Cookies Policy Close PRIVACY OVERVIEW This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities... 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