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The Hacker News - Cybersecurity News and Analysis: DNS Security

Reimagine Hybrid Work: Same CyberSec in Office and at Home

Reimagine Hybrid Work: Same CyberSec in Office and at Home
June 17, 2022The Hacker News
It was first the pandemic that changed the usual state of work - before, it was commuting, working in the office & coming home for most corporate employees. Then, when we had to adapt to the self-isolation rules, the work moved to home offices, which completely changed the workflow for many businesses. As the pandemic went down, we realized success never relied on where the work was done. Whether your office is your kitchen, your bedroom, a nearby cafe, or your actual workplace in an office building, it all comes down to the fact that job success has nothing to do with your location.  The role of the office in the hybrid era is also changing - according to the research conducted by  PwC , it now serves the purpose of collaborating with team members and building relationships. From an employee's side, it sounds pretty logical and obvious.  However, if we look at hybrid work with the eyes of an employer, things get complicated. How does one make sure corporate devices & da

SafeDNS: Cloud-based Internet Security and Web Filtering Solution for MSPs

SafeDNS: Cloud-based Internet Security and Web Filtering Solution for MSPs
February 15, 2022The Hacker News
Remote workplace trend is getting the upper hand in 2022. A recent survey by IWG (the International Workplace Group) determined that 70% of the world's professionals work remotely at least one day a week, with 53% based outside their workplace at least half of the week. Taking this into consideration, organizations have started looking for reliable partners that can deliver services and support consistently, for example, to install new hybrid infrastructure solutions while trusting them with the everyday functioning of their IT. So far, MSPs have been meeting this demand by offering multiple solutions that help employees work remotely without any problems. What are the main cybersecurity solutions remote workers need? Multi-Factor Authentication Virtual Private Network DNS Filtering to secure DNS traffic Why is a web filtering important and what are the main features necessary for MSPs? Managed service providers have been struggling with finding the right web filtering

Don't Use Public Wi-Fi Without DNS Filtering

Don't Use Public Wi-Fi Without DNS Filtering
January 18, 2022The Hacker News
Providing public Wi-Fi is a great service to offer your customers as it becomes more and more standard in today's society. I like the fact that I do not have to worry about accessing the Internet while I am away, or spending a lot of money on an international connection, or just staying offline while I am away. With public Wi-Fi, modern life has become a constant connection to the Internet, whether we are on the bus, on the way to school or work, waiting for our flight in the airport or during the flight itself, or doing our homework or working on our projects in a café. We do business and communicate online in a variety of ways. We check our work emails, chat with our friends, and even take business calls online through the service. According to recent statistics, there are about 410,000 public Wi-Fi hotspots in the United States alone, in public places such as parks, libraries, public transportation, and train stations. Cons of using public Wi-Fi Despite the many benefits t

New Side Channel Attacks Re-Enable Serious DNS Cache Poisoning Attacks

New Side Channel Attacks Re-Enable Serious DNS Cache Poisoning Attacks
November 18, 2021Ravie Lakshmanan
Researchers have demonstrated yet another variant of the SAD DNS cache poisoning attack that leaves about 38% of the domain name resolvers vulnerable, enabling attackers to redirect traffic originally destined to legitimate websites to a server under their control. "The  attack  allows an off-path attacker to inject a malicious DNS record into a DNS cache," University of California researchers Keyu Man, Xin'an Zhou, and Zhiyun Qian  said . "SAD DNS attack allows an attacker to redirect any traffic (originally destined to a specific domain) to his own server and then become a man-in-the-middle (MITM) attacker, allowing eavesdropping and tampering of the communication." The latest flaw affects Linux kernels as well as popular DNS software, including BIND, Unbound, and dnsmasq running on top of Linux, but not when run on other operating systems FreeBSD or Windows. From Kaminsky Attack to SAD DNS DNS cache poisoning, also called DNS spoofing, is a  technique  i

New TsuNAME Flaw Could Let Attackers Take Down Authoritative DNS Servers

New TsuNAME Flaw Could Let Attackers Take Down Authoritative DNS Servers
May 07, 2021Ravie Lakshmanan
Security researchers Thursday disclosed a new critical vulnerability affecting Domain Name System (DNS) resolvers that could be exploited by adversaries to carry out reflection-based denial-of-service attacks against authoritative nameservers. The flaw, called  'TsuNAME ,' was discovered by researchers from SIDN Labs and InternetNZ, which manage the national top-level internet domains '.nl' and '.nz' for the Netherlands and New Zealand, respectively. "TsuNAME occurs when domain names are misconfigured with cyclic dependent DNS records, and when vulnerable resolvers access these misconfigurations, they begin looping and send DNS queries rapidly to authoritative servers and other resolvers," the researchers said. A recursive DNS resolver is one of the core components involved in  DNS resolution , i.e., converting a hostname such as www.google.com into a computer-friendly IP address like 142.250.71.36. To achieve this, it responds to a client's r

A Set of Severe Flaws Affect Popular DNSMasq DNS Forwarder

A Set of Severe Flaws Affect Popular DNSMasq DNS Forwarder
January 19, 2021Ravie Lakshmanan
Cybersecurity researchers have uncovered multiple vulnerabilities in Dnsmasq, a popular open-source software used for caching Domain Name System (DNS) responses, thereby potentially allowing an adversary to mount DNS  cache poisoning attacks  and remotely execute malicious code. The seven flaws, collectively called " DNSpooq " by Israeli research firm JSOF, echoes previously disclosed weaknesses in the DNS architecture, making Dnsmasq servers powerless against a range of attacks. "We found that Dnsmasq is vulnerable to DNS cache poisoning attack by an off-path attacker (i.e., an attacker that does not observe the communication between the DNS forwarder and the DNS server)," the researchers noted in a report published today. "Our attack allows for poisoning of multiple domain names at once, and is a result of several vulnerabilities found. The attack can be completed successfully under seconds or few minutes, and have no special requirements. We also found

SAD DNS — New Flaws Re-Enable DNS Cache Poisoning Attacks

SAD DNS — New Flaws Re-Enable DNS Cache Poisoning Attacks
November 12, 2020Ravie Lakshmanan
A group of academics from the University of California and Tsinghua University has uncovered a series of critical security flaws that could lead to a revival of DNS cache poisoning attacks. Dubbed " SAD DNS attack " (short for Side-channel AttackeD DNS), the technique makes it possible for a malicious actor to carry out an off-path attack, rerouting any traffic originally destined to a specific domain to a server under their control, thereby allowing them to eavesdrop and tamper with the communications. "This represents an important milestone — the first weaponizable network side channel attack that has serious security impacts," the researchers said. "The attack allows an off-path attacker to inject a malicious DNS record into a DNS cache." Tracked as CVE-2020-25705, the findings were presented at the ACM Conference on Computer, and Communications Security (CCS '20) held this week. The flaw affects operating systems Linux 3.18-5.10, Windows Serv

New DNS Vulnerability Lets Attackers Launch Large-Scale DDoS Attacks

New DNS Vulnerability Lets Attackers Launch Large-Scale DDoS Attacks
May 20, 2020Ravie Lakshmanan
Israeli cybersecurity researchers have disclosed details about a new flaw impacting DNS protocol that can be exploited to launch amplified, large-scale distributed denial-of-service (DDoS) attacks to takedown targeted websites. Called NXNSAttack , the flaw hinges on the DNS delegation mechanism to force DNS resolvers to generate more DNS queries to authoritative servers of attacker's choice, potentially causing a botnet-scale disruption to online services. "We show that the number of DNS messages exchanged in a typical resolution process might be much higher in practice than what is expected in theory, mainly due to a proactive resolution of name-servers' IP addresses," the researchers said in the paper. "We show how this inefficiency becomes a bottleneck and might be used to mount a devastating attack against either or both, recursive resolvers and authoritative servers." Following responsible disclosure of NXNSAttack, several of the companies i

Firefox enables DNS-over-HTTPS by default (with Cloudflare) for all U.S. users

Firefox enables DNS-over-HTTPS by default (with Cloudflare) for all U.S. users
February 25, 2020Mohit Kumar
If you use the Firefox web browser, here's an important update that you need to be aware of. Starting today, Mozilla is activating the DNS-over-HTTPS security feature by default for all Firefox users in the U.S. by automatically changing their DNS server configuration in the settings. That means, from now onwards, Firefox will send all your DNS queries to the Cloudflare DNS servers instead of the default DNS servers set by your operating system, router, or network provider. As you may know, DNS-over-HTTPS (DoH) protocol performs DNS lookups — i.e., finding the server I.P. address of a certain domain name — over an encrypted connection to a DNS server rather than sending queries in the plaintext. This privacy-focused technology makes it harder for man-in-the-middle attackers, including your ISPs, to manipulate DNS queries, eavesdrop on your Internet connection, or learning what sites you visit. "This helps hide your browsing history from attackers on the network,

DHS Orders U.S. Federal Agencies to Audit DNS Security for Their Domains

DHS Orders U.S. Federal Agencies to Audit DNS Security for Their Domains
January 22, 2019Swati Khandelwal
The U.S. Department of Homeland Security (DHS) has today issued an "emergency directive" to all federal agencies ordering IT staff to audit DNS records for their respective website domains, or other agency-managed domains, within next 10 business days. The emergency security alert came in the wake of a series of recent incidents involving DNS hijacking , which security researchers with "moderate confidence" believe originated from Iran. Domain Name System (DNS) is a key function of the Internet that works as an Internet's directory where your device looks up for the server IP addresses after you enter a human-readable web address (e.g., thehackernews.com). What is DNS Hijacking Attack? DNS hijacking involves changing DNS settings of a domain, redirecting victims to an entirely different attacker-controlled server with a fake version of the websites they are trying to visit, often with an objective to steal users' data. "The attacker alter

Google DNS Service (8.8.8.8) Now Supports DNS-over-TLS Security

Google DNS Service (8.8.8.8) Now Supports DNS-over-TLS Security
January 10, 2019Swati Khandelwal
Almost every activity on the Internet starts with a DNS query, a key function of the Internet that works as an Internet's directory where your device looks up for the server IP addresses after you enter a human-readable web address (e.g., thehackernews.com). Since DNS queries are sent in clear text over UDP or TCP without encryption, the information can reveal not only what websites an individual visits but is also vulnerable to spoofing attacks. To address these problems, Google announced Wednesday that its Public DNS (Domain Name System) service finally supports DNS-over-TLS security protocol, which means that the DNS queries and responses will be communicated over TLS-encrypted TCP connections. The DNS-over-TLS has been designed to make it harder for man-in-the-middle attackers to manipulate the DNS query or eavesdrop on your Internet connection. Launched over eight years ago, Google Public DNS, at IP addresses 8.8.8.8 and 8.8.4.4, is world's largest public Domai

Google to add "DNS over TLS" security feature to Android OS

Google to add "DNS over TLS" security feature to Android OS
October 23, 2017Mohit Kumar
No doubt your Internet Service Provides (ISPs), or network-level hackers cannot spy on https communications. But do you know — ISPs can still see all of your DNS requests, allowing them to know what websites you visit. Google is working on a new security feature for Android that could prevent your Internet traffic from network spoofing attacks. Almost every Internet activity starts with a DNS query, making it a fundamental building block of the Internet. DNS works as an Internet's phone book that resolves human-readable web addresses, like thehackernews.com, against their IP addresses. DNS queries and responses are sent in clear text (using UDP or TCP) without encryption, which makes it vulnerable to eavesdropping and compromises privacy. ISPs by default resolve DNS queries from their servers. So when you type a website name in your browser, the query first goes to their DNS servers to find the website's IP address, which eventually exposes this information (metada
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