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The Hacker News — Cyber Security and Hacking News Website: NTP Server

NTP DoS Exploit Released — Update Your Servers to Patch 10 Flaws

NTP DoS Exploit Released — Update Your Servers to Patch 10 Flaws

November 23, 2016Mohit Kumar
A proof-of-concept (PoC) exploit for a critical vulnerability in the Network Time Protocol daemon (ntpd) has been publically released that could allow anyone to crash a server with just a single maliciously crafted packet. The vulnerability has been patched by the Network Time Foundation with the release of NTP 4.2.8p9, which includes a total of 40 security patches, bug fixes, and improvements. The NTP daemon is used in almost every device that needs to synchronize time on computer clocks. NTP got the most attention in late 2014 and 2015 when hackers used it to launch highly amplified DDoS attacks against services. The flaw which affects NTP.org's nptd versions prior to 4.2.8p9, but not including ntp-4.3.94, has been discovered by security researcher Magnus Stubman, who privately disclosed it to the Network Time Foundation on June 24. A patch for the vulnerability was developed and sent to Stubman on 29th September and just two days later, the researcher acknowledged t
First Time Ever Apple Automatically Pushes Security Patch for Mac OS

First Time Ever Apple Automatically Pushes Security Patch for Mac OS

December 24, 2014Mohit Kumar
First time ever in the History, Apple Inc. has pushed out an automatic security update for Macintosh OS X computers to address a critical security issue that, according to the company, was too risky to wait for users to patch after seeking their prior approval. Despite having the ability for years to silently and automatically update its users computers, Apple typically asks its users' permission to approve them manually or automatically before installing any security update of this kind. But, the company has exercised its ability for the very first time to patch a critical security flaw in a component of its OS X operating system called the Network Time Protocol (NTP) . This newly discovered security vulnerability, assigned CVE-2014-9295, became public late last week and affects all operating systems, including OS X and other Linux and Unix distributions, running versions of NTP4 prior to 4.2.8. NTP is used for synchronizing clocks between computer systems and across the globa
Largest Ever 400Gbps DDoS attack hits Europe uses NTP Amplification

Largest Ever 400Gbps DDoS attack hits Europe uses NTP Amplification

February 12, 2014Swati Khandelwal
The Distributed Denial of Service (DDoS) attack is the one of favourite weapon for the hackers to temporarily suspend services of a host connected to the Internet and till now nearly every big site had been a victim of this attack. Since 2013, Hackers have adopted new tactics to boost Distributed Denial of Service attack sizes, which is known as ‘ Amplification Attack ’, that provide the benefits of obscuring the source of the attack, while enabling the bandwidth to be used to multiply the size of the attack. Just yesterday, hackers have succeeded in reaching new heights of the massive DDoS attack targeting content-delivery and anti-DDoS protection firm CloudFlare , reaching more than 400Gbps at its peak of traffic, striking at the company’s data servers in Europe. “ Very big NTP reflection attack hitting us right now. Appears to be bigger than the #Spamhaus attack from last year. Mitigating ,” CloudFlare CEO Matthew Price said in a tweet. “ Someone’s got a big, new can
100Gbps DDoS attack took down Gaming servers with NTP Servers

100Gbps DDoS attack took down Gaming servers with NTP Servers

January 14, 2014Swati Khandelwal
The New Year begins with a new form of amplified Distributed Denial of Service (DDoS) Attack, a weapon for attackers to bring down websites and servers. As we have reported two weeks ago that the attackers are abusing the Network Time Protocol (NTP) servers to perform an amplified version of DDoS Attack on various targets across the world. Earlier this week a number of popular Gaming services, including League of Legends, EA.com and Battle.net from Blizzard were taken down by similar DDoS attack . 'Network Time Protocol (NTP)' is a distributed network clock time synchronization protocol that is used to synchronize computer clock times in a network of computers and runs over port 123 UDP. " The attacker sends a small spoofed 8-byte UDP packets are sent to the vulnerable NTP Server that requests a large amount of data (megabytes worth of traffic) be sent to the DDoS's target IP Address.  "Security Researcher, Wang Wai  detailed  in a previous article on ‘The
Abusing Network Time Protocol (NTP) to perform massive Reflection DDoS attack

Abusing Network Time Protocol (NTP) to perform massive Reflection DDoS attack

January 03, 2014Wang Wei
In 2013, we have seen a significant increase in the use of a specific distributed denial of service (DDoS) methodology known as Distributed Reflection Denial of Service attacks (DrDoS). Open and misconfigured DNS (Domain Name System) can be used by anyone to resolve domain names to IP addresses are increasingly abused to launch powerful DDoS attacks. But not only the DNS servers, Security Researchers at Symantec  have spotted Network Time Protocol (NTP) reflection DDoS attacks being launched by cyber criminals during the Christmas Holidays. ' Network Time Protocol (NTP) ' is a distributed network clock time synchronization protocol that is used to synchronize computer clock times in a network of computers and runs over port 123 UDP. NTP is one of those set-it-and-forget-it protocols that is configured once and most network administrators don't worry about it after that. Unfortunately, that means it is also not a service that is upgraded often, leaving it vulnerable to th
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