Tag Archives: stop ddos attacks

Businesses receive another warning over the threat of DDoS attacks

We have all heard the stories of businesses which have suffered debilitating DDoS attacks and, in some cases, succumbing altogether. Take Code Spaces, the web-based SVN and Git hosting provider which suffered such an attack in June 2014 that it was forced to wave the white flag and cease trading after recovering all the data lost would cost too much. Now, a new piece of research from A10 Networks argues businesses face ‘sudden death’ from DDoS if caught unawares. The average company was hit by an average of 15 DDoS attacks per year, according to the survey of 120 IT decision makers, with larger organisations more badly affected. One in three (33%) respondents said they had encountered DDoS attacks of more than 40 Gbps, while one in five had suffered downtimes of more than 36 hours due to the attack. The average attack of those polled lasted 17 hours. More than half (54%) of respondents said they would increase their DDoS budgets in the coming six months, while multi-vector attacks were seen by the majority of those polled (77%) as the most dangerous form of DDoS threat in the future. “DDoS attacks are called ‘sudden death’ for good reason. If left unaddressed, the costs will include business, time to service restoration and a decline in customer satisfaction,” said A10 Networks CTO Raj Jalan. He added: “The good news is our findings show that security teams are making DDoS prevention a top priority. With a better threat prevention system, they can turn an urgent business threat into an FYI-level notification.” Previous research has examined the growing sophistication of DDoS threats. In April, Neustar argued that such DDoS issues were “unrelenting”, with more than seven in 10 global brands polled having been subject to an attack. Source: http://www.appstechnews.com/news/2016/jun/16/businesses-receive-another-warning-over-threat-ddos-attacks/

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Businesses receive another warning over the threat of DDoS attacks

DDoS defenses have been backsliding but starting a turnaround

Distributed denial-of-service attacks have been getting bigger and lasting longer, and for the past few years defenses haven’t kept pace, but that seems to be changing, Gartner analysts explained at the firm’s Security and Risk Management Summit. Gartner tracks the progress of new technologies as they pass through five stages from the trigger that gets them started to the final stage where they mature and are productive. The continuum is known as the Hype Cycle. DDoS defense had reached the so-called Plateau of Productivity – the final stage – in 2012, but then has moved backwards in the Hype Cycle in the past few years into the previous stage – the Slope of Enlightenment – says Gartner analyst Lawrence Orans. That fall, DDoS attacks were 10 times as large as any then seen hit Bank of America, JPMorgan Chase, Wells Fargo, U.S. Bank and PNC Bank using botnets of compromised servers to generate high volumes of traffic against not only HTTP and HTTPS but DNS as well. They also went after protocols including TCP, UDP, and ICMP. That was followed up in 2013 by the use of NTP amplification attacks that used Network Time Protocol servers to swamp networks with responses to requests made from spoofed IP addresses in the target network. “That set DDoS back on its heels,” Orans says. But security vendors and service providers that offer DDoS protection have caught up, and Gartner’s Hype Cycle rating for DDoS defenses will shift again back toward the maturity end of the scale, he says. That’s encouraging because the number of DDoS attacks from the first quarter of 2015 to the first quarter of 2016 more than doubled, according to Akamai’s latest State of the Internet Security report, and mega attacks hit hundreds of gigabits per second. Attacks of 300Gbps and above can be handled by leading DDoS vendors, Orans says, and given the ready availability of DDoS attack kits, it’s important for corporations to pay for this type of protection. Competition among DDoS mitigation providers is increasing, so prices have dropped, he says. Flat fees per month were the norm for DDoS protection services, but now there are more flexible plans. Protection can come in three models. Providers sell access to scrubbing centers, where traffic during a DDoS attack is redirected to a provider’s network where the attack traffic is dropped and only good traffic returned to the customer network. This can cost $5,000 per month and up. Some providers he mentioned: Akamai, Arbor, F5, Neustar, Nexusguard, Radware and Verisign. Some ISPs offer this type of service at a 15% to 20% premium over bandwidth costs, he says. Some ISPs are better at it than others, so customers should check them carefully, particularly newer and regional ones. Many businesses have multiple ISPs, so they should do the math to see if it makes sense to use this option, he says. Some ISPs he mentions: AT&T, CenturyLink, Level 3 and Verizon. Content-delivery networks can also help mitigate DDoS attacks, he says, by virtue of their architecture. CDNs distribute customer Web content around the world so it’s as close as possible to end users. That distribution makes it harder for attackers to find the right servers to hit and diffuses their capabilities. This option isn’t for everyone, he says. It’s not as effective as the others and it doesn’t make sense unless a business needs a CDN anyway to boost its response time. Web application firewalls can help mitigate those DDoS attacks that seek to disrupt use of Web applications. They can be deployed on premises with gear owned by the customer, but internet-hosted and cloud-based WAF services are emerging, Orans says. Cloud-based WAF is fastest growing for mobile devices that must be deployed quickly, he says. Source: http://www.networkworld.com/article/3083797/security/gartner-ddos-defenses-have-been-backsliding-but-starting-a-turnaround.html

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DDoS defenses have been backsliding but starting a turnaround

DNS attacks cost businesses more than $1 million a year

New research has revealed that DNS attacks are costing businesses more than $1 million a year in lost business and service downtime. For years, DNS has silently and peacefully served internet needs, but it’s mostly been thought of as a trivial protocol requiring very basic configuration and monitoring. Despite its criticality, this service has never really been considered as a potential security issue, mostly because common usage leads people to believe it is a trivial protocol requiring very basic confguration and monitoring. But while DNS may have been safe and apparently secure for the last twenty years, because of its complexity and evolving role in the IT industry it has become a powerful attack vector, with 91% of malware using the DNS protocol. According to the new study from IDC and EfficientIP , the top three DNS attacks that have the largest impact on an organisation are Distributed Denial of Service (DDoS attacks, Zero-Day vulnerabilities and data exfiltration. These types of attacks are the main cause of business outage and data theft. But despite 74% being victims of DNS attacks, 25% of businesses still aren’t implementing any kind of basic security software. EfficientIP’s experts warn that existing DNS defenses are outdated and no longer work. Until now, the approach to IT Security has been one that has downplayed the risk of DNS threats, bundling them in with a wide selection of diferent network threats that can be protected using traditional security tools and techniques. It is an approach that threatens DNS security by overcomplicating architectures, adding slow and inappropriate layers of defence. While firewalls can protect on a basic level, on their own they;re not designed to deal with high bandwidth DDoS attacks, or detect DNS tunnelling attempts (the majority of DDoS attacks are now over 1Gbps), and most businesses still rely on the ‘out-of-the-box’ non-secure DNS servers offered by Microsoft or Linux servers. ‘The report has highlighted that despite the massive increase in cyber attacks, companies and their IT departments still don’t fully appreciate the risks from DNS-based attacks,’ said David Williamson, EfficientIP CEO. ‘In just under two years GDPR will come into effect and companies will be held responsible for all security breaches and could face major fines. It’s crucial for all businesses to start taking DNS security seriously.’ Source: http://www.information-age.com/technology/security/123461604/dns-attacks-cost-businesses-more-1-million-year-study

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DNS attacks cost businesses more than $1 million a year

Defending against DDoS-Day

It was tax time in Australia, 2014, and one Sydney tax agent, like many others across the country, was all-hands-on-deck as staff took endless calls and filled appointment diaries. The frantic pace was welcomed at the young firm, which prided itself on being hip, casual, and cool. The firm’s slick, mobile-friendly website and a good search engine ranking brought a decent rush of new clients to the firm each year. So when the site went on- and offline over the course of a week, phones stopped ringing and staff panicked. The firm was on the receiving end of a distributed denial-of-service (DDoS) attack from IP addresses out of Eastern Europe that overwhelmed the small business IT infrastructure. An email in the company’s generic inbox demanded that US$1,000 be wired to a Western Union account in order for the attacks to stop. “We called our tech guys and they tried to block it,” a senior tax accountant told CRN on condition of anonymity. “We called the cops, but no-one could fix it quickly enough so we paid.” The price was cheap compared to the damage wrought. And fears that the criminals would just ask for more money once the ransom was paid were unfounded; the attacks stopped abruptly and no more was heard from them. Booters and stressers When a dam threatens to breach, it helps to have a network of diversion channels where the water can flow away from the towns below. So it is that a wave of DDoS packets can be soaked up by throwing large networks in front of the target. The floods are becoming more common, but their nature is changing to something more efficient and dangerous than in previous years. Akamai’s latest release of the popular State of the Internet report for the last quarter of 2015 finds a 149 percent increase in total DDoS attacks and a 169 percent increase in infrastructure layer attacks over the same period in 2014. The “vast majority” of these attacks were from so-called booter or stresser providers, the DDoS-for-hire services that operate with a gossamer-thin veil of legitimacy for customers who pay hourly to monthly rates to point the attacks at their own infrastructure. Of course, many who use the services point the booters at rival businesses, governments and, notably, live-stream gaming video channels operated by rivals. These attacks have “increased dramatically”, Akamai says, compared to the preceding three months, with use of network timing attacks that power the booters up by 57 percent on the previous quarter. Such attacks abuse the network timing protocol so a small query generates a large response, which is redirected at a target. “Network Time Protocol amplification attacks have be used in large-scale DDoS attacks peaking shy of 400Gbps, but DNS amplification attacks have also been successfully used to cripple infrastructure and cause serious financial losses,” BitDefender senior threat analyst Adrian Liviu Arsene says. “One of the largest DDoS attack to date was reported to have reached around 500Gbps, although the standard is somewhere around 100Gbps.” Motive and intent Distributed denial-of-service is the second most likely digital attack to be familiar to the average pedestrian after viruses. The method of attack hit mainstream headlines some six years ago, when online activist group Anonymous brought down major websites, including Paypal, the Recording Industry Association of America and the sites of Canberra public agencies. Systematic arrests followed, bursting the bubble of those participants who thought safety in numbers would shield their IP addresses from being singled out by police. It signalled a fall in popularity of DDoS as a means of protest. The criminal undercurrent remains and here cash is king, but motivations still vary. Businesses use DDoS attacks to knock off rivals and criminals to send sites offline until a ransom is paid. Yet others use the digital flood as a diversion to distract security defenders and set off alarms while they hack into back-end systems. One group known as DDoS for Bitcoin, or DDoS4BC, is using the proven anonymity of the crypto-currency to extort companies through DDoS. It is a safer model for criminals than that which ripped through the Sydney tax accountancy, and considerably more expensive for victims. It is, as of January, known to have hit more than 150 companies around the world, first sending an extortion note demanding between AU$5,600 and a whopping AU$112,000 in Bitcoins before launching small DDoS attacks to demonstrate the group’s capabilities. For some victims, the DDoS may be short-lived and devoid of any apparent motive, according to Verizon Enterprise Solutions investigative response managing principal Ashish Thapar. “We have definitely seen DDoS on the rise and several of our partners are logging double the [usual] number of incidents,” Thapar says. “We are also seeing DDoS attacks bringing companies them to their knees but not entirely offline, which acts as a smokescreen for advanced persistent threat attacks at the back end.” That’s also something Secure Logic chief executive officer Santosh Devaraj has seen. The company hosts iVote, the electronic voting system for NSW, and last year bagged the $990,000 contract to operate it until 2020. “There are ‘DDoS for hire’ groups we’ve seen as part of monitoring iVote that may be trying to gain access to infrastructure at the back,” Devaraj says. “The real threat may not be the DDoS.” DDoS down under Australian businesses are less targeted than those overseas, experts agree, thanks in part to our smaller internet pipes. But with the NBN rolling out, DDoS Down Under is expected to become big. The midmarket is likely to be hit harder, BitDefender’s Arsene says. “Midmarket DDoS attacks are likely to rise as the chances of targets actually paying are higher than for other organisations,” he says. “[Criminals] specifically target midmarket companies that don’t have the technical resources to fend off such attacks.” Akamai chief strategist John Ellis agrees, saying extortionists “tend to hit the sites with a large online presence”. “For cyber adversaries, the [midmarket] provides a fantastic target,” Ellis adds. “A Sydney developer team that relies heavily in online app availability, for example, may have to seriously consider whether it rolls over and pays DDoS extortionists.” The attacks in Australia are, for now, fairly small. “We are seeing bigger DDoS attacks, but they’re nowhere near the size of attacks in the US,” says Melbourne IT cloud and mobile solutions general manager Peter Wright. “It is partly because infrastructure and bandwidth limitations reduce the size of DDoS attacks. It is an attribute of infrastructure capacity and there is a risk that, as we broaden the pipes [as part of the National Broadband Network], it brings huge benefits but increases the risk profile as well.” Sinking feeling Big banks are smashed by DDoS attacks every day and largely do not bat an eyelid. Online gambling companies, too, across Australia are blasted during big sporting events. These top end of town players have expensive, tried-and-tested scrubbing mechanisms to largely neuter DDoS attacks, although some betting agencies are known to have regularly paid off attackers during the Melbourne Cup, treating it as a cost of business. The midmarket is not left to its own devices, however. Hosting providers like Melbourne IT and others offer DDoS protection against applications and services, while other companies have cheaper offerings for the budget market. “I am sympathetic to the midmarket, their need for bang-for-buck,” Ellis says. “The challenge for the midmarket is that they don’t have the money that they need… they should focus on business outcomes and partners who understand their business and design outcomes.” For Secure Logic’s Devaraj, DDoS mitigation comes down to a solid cyber security operations centre. “It is where I believe the industry should invest, rather than a particular technology.” Yet companies can use free or cheap DDoS protection from the likes of CloudFlare, or opt for do-it-yourself options that require hardening of security defences – something the average small technology shop may lack the ability to do. “There are DDoS sinkholes and capabilities with our cloud partners,” Wright says. “If a resource or function is hit, we can move workloads to other resources dynamically.” Arsene agrees. “Midmarket tech guys need to start by incorporating DDoS attack risks into their corporate security strategies. Using a secure and managed DNS that supports changing internet protocols on the fly is also recommended, as well as patching software vulnerabilities to mitigate application layer attacks.” Source: http://www.crn.com.au/feature/defending-against-ddos-day-419470/page1 http://www.crn.com.au/feature/defending-against-ddos-day-419470/page2

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Defending against DDoS-Day

Flaw in Juniper’s JunOS router software could cause DDoS flood

Juniper has disclosed that that a problem with the Junos router could enable DDoS attacks Juniper has admitted that a vulnerability in IPv6 processing on its Junos router OS could allow malicious packets to be sent to networks resulting in a DDoS attack on infrastructure. In an advisory, the firm said the flaw could enable a specially crafted “IPv6 Neighbor Discovery” (ND) packet to be accepted by the router rather than discarded. “The crafted packet, destined to the router, will then be processed by the routing engine (RE). A malicious network-based packet flood, sourced from beyond the local broadcast domain, can cause the RE CPU to spike, or cause the DDoS protection ARP protocol group policer to engage. When this happens, the DDoS policer may start dropping legitimate IPv6 neighbors as legitimate ND times out,” the firm said. The firm added that this is similar to the router’s response to any purposeful malicious IPv6 ND flood destined to the router. “The difference is that the crafted packet identified in the vulnerability is such that the forwarding controllers/ASICs should disallow this traffic from reaching the RE for further processing,” according to the advisory. It said that following investigations, only its MX, PTX, and QFX products have been confirmed to experience this behaviour. Juniper added that no fix was presently available at the time of writing and neither was a complete workaround. “Security best current practices (BCPs) of filtering all ND traffic at the edge, destined to network infrastructure equipment, should be employed to limit the malicious attack surface of the vulnerability,” the firm advised. Rich Barger, chief intelligence officer at ThreatConnect, told SCMagazineUK.com that organisations should look to either filter the protocol or packet (if possible). “It looks as if Juniper has included edge firewall rules that can block the neighbour discovery packets as a means to buffer any vulnerable devices,” he said. Richard Cassidy, technical director EMEA at Alert Logic, said that this flaw represents a serious issue for organisations that “Dual Stack” networking with IPv6 and IPv4. He told SC that the issue was “essentially a DDoS attack, through a specially crafted IPv6 ND packet, that can be targeted at JunOS routers from remote attackers. It is fairly simple to identify router OS versions through scanning techniques, which of course leaves most organisations at risk at some level, given the prevalence of Juniper in networking infrastructures globally.” Alex Cruz Farmer, VP of cloud at Nsfocus, told SC that almost every network around the world is considering or planning IPv6 if they have not already. “With this in mind, it’s crucial that the protection is implemented now, to avoid this security hole being exploited in future.” Source: http://www.scmagazineuk.com/flaw-in-junipers-junos-router-software-could-cause-ddos-flood/article/501681/

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Flaw in Juniper’s JunOS router software could cause DDoS flood

Anonymous DDoS and shutdown London Stock Exchange for two hours

Anonymous hacktivists take down the London Stock Exchange website for more than two hours as part of protest against world’s banks The online hacktivist group, Anonymous reportedly shut down the London Stock Exchange (LSE) website last week for more than two hours as part of a protest against world’s banks and financial institutions. According to the Mail on Sunday, the attack was carried out by Philippines unit of Anonymous on June 2 at 9am. Previous targets have included the Bank of Greece, the Central Bank of the Dominican Republic and the Dutch Central Bank. The newspaper says: “Anonymous claims the incident was one of 67 successful attacks it has launched in the past month on the websites of major institutions, with targets including the Swiss National Bank, the Central Bank of Venezuela and the Federal Reserve Bank of San Francisco.” A spokesperson for the LSE declined to comment on the incident, however, the attack most likely took the form of a distributed denial of service (DDoS) attack, meaning trading would not have been affected and no sensitive data would have been compromised. In the 24 hours before the LSE site went down, the group also claims that the attack on the LSE was the latest in a series that has also seen it target the websites of NYSE Euronext, the parent company of the New York Stock Exchange and the Turkey Stock Exchange, as part of a campaign called Operation Icarus. According to the newspaper, City of London Police said it was not informed that the LSE website had gone down and had no knowledge of the attack. However, the latest attack may not be a complete surprise. In a video posted to YouTube on May 4, a member of the amorphous group announced in that “central bank sites across the world” would be attacked as part of a month-long Operation Icarus campaign. The video statement said: “We will not let the banks win, we will be attacking the banks with one of the most massive attacks ever seen in the history of Anonymous.” By using a distributed-denial-of-service (DDoS) cyberattack, the group also successfully disrupted the Greek central bank’s website. In light of that event, a separate video was posted to YouTube on May 2. The masked individual representing Anonymous group said: “Olympus will fall. How fitting that Icarus found his way back to Greece. Today, we have continuously taken down the website of the Bank of Greece. Today, Operation Icarus has moved into the next phase.” The Anonymous spokesperson added: “Like Icarus, the powers that be have flown too close to the sun, and the time has come to set the wings of their empire ablaze, and watch the system their power relies on come to a grinding halt and come crashing down around them. We must strike at the heart of their empire by once again throwing a wrench into the machine, but this time we face a much bigger target – the global financial system.” Source: http://www.techworm.net/2016/06/anonymous-ddos-shutdown-london-stock-exchange-two-hours.html

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Anonymous DDoS and shutdown London Stock Exchange for two hours

Hackers Hit Facebook CEO Mark Zuckerberg’s Twitter and Pinterest Accounts

Facebook co-founder and CEO Mark Zuckerberg was apparently targeted by a hacking team over the weekend that was able to access his seldom-used Twitter and Pinterest accounts. The hacker group OurMine, believed to be based in Saudi Arabia, posted messages to Zuckerberg’s Twitter account, @finkd, which features just 19 tweets and hasn’t been otherwise updated since 2012. The team also briefly commandeered Zuckerberg’s Pinterest account, which has just a few boards and pins. Both Twitter and Pinterest have since removed the unauthorized content on Zuckerberg’s accounts, and Twitter has also suspended OurMine’s main account. The group is now posting on Twitter via a backup account. ‘Saving People from Other Hackers’ On Sunday, OurTeam tweeted on the backup account, “i don’t understand why @twitter suspended our account while we are saving people from other hackers!” Another tweet posted this morning added, “Our Old Twitter (@_OurMine_) is suspended because we are just trying to secure Mark Zuckerberg Accounts!” The person or people posting to the backup OurTeam Twitter page also noted they would try to get the team’s main Twitter account unsuspended. Contrary to some news reports stating that OurTeam claimed to have found Zuckerberg’s login information from user data leaked from a major hack attack on LinkedIn in 2012, the hacking group noted in a tweet yesterday that it had made no such claim and added that it had never used LinkedIn. ‘Relatively New’ Hacking Group OurMine is a “relatively new” hacking group that first appeared on Twitter in March 2015, according to a report published by the content delivery network specialist Akamai last year. The team initially appeared to focus on distributed denial of service (DDoS) attacks on gaming services, and later took responsibility for similar such attacks on financial service companies. Nine companies were attacked by OurTeam on July 22 of last year, with the combined DDoS attack levels exceeding 117 gigabytes per second. OurMine has also claimed to have attacked a number of other targets, including Soundcloud and PewDiePie. Zuckerberg hasn’t made any public statement regarding the OurMine attacks on his accounts. However, after OurMine tweeted it had accessed his accounts, Zuckerberg responded, “No you didn’t. Go away, skids.” That tweet has also since been removed. A June 2012 hack of LinkedIn was originally believed to have involved just 6.5 million passwords — at least, that’s the number LinkedIn first acknowledged. However, a report emerged last month that a dark Web marketplace and another site, LeakedSource, had obtained data from 167 million hacked LinkedIn accounts. Of those, 117 million included e-mails and passwords. The remaining accounts are thought to belong to users who logged into the site via Facebook. Some news reports have stated that OurTeam claimed to have found Zuckerberg’s Twitter and Pinterest password — “dadada” — in the compromised LinkedIn data. Source: http://www.sci-tech-today.com/news/Hackers-Hit-Zuckerberg-s-Accounts/story.xhtml?story_id=012001GT5W5O

BitGo Under DDoS Attack; Wirex Advises Customers Not To Use Platform

Wirex, a bitcoin debit card provider, sent an email to customers today advising them to avoid making transactions on the Wirex platform until it could confirm from thatBitGo services have been resumed. The message included a BitGo tweet advising users it was under a distributed denial of service (DDoS) attack. BitGo is a wallet and a security platform for bitcoin and blockchain technologies. “We, therefore, recommend to avoid making any transactions via E-Coin/Wirex platform until confirmation from BitGo that the services have been resumed,” the Wirex email noted. The BitGo tweet stated: “We apologize for the issue, but we’re under DDOS attack at this moment. We’re working on it and will keep you updated.” Wirex is a wallet service that provides both physical and virtual bitcoin debit cards. Wirex users were able to send bitcoin from within the BitGo Instant network. BitGo Offers Instant Settlement Wirex uses the BitGo Instant service, which provides immediate settlement of bitcoin transactions, CCN reported in February. There was nothing on the BitGo blog about the attack at the time of this report. BitGo’s service eliminates the “double spend” potentiality in bitcoin transactions. The service is for users seeking instant bitcoin transactions while securing funds against the possibility that the sender will spend the money elsewhere before the transaction gets confirmed via the blockchain. BitGo provides immediate transaction settlement using the crypto keys among participating users’ wallets. BitGo Gains A Following Other cryptocurrency exchanges and apps offering BitGo Instant include Bitstamp, Bitfinex, Unocoin, Kraken and the Fold app. There have been several DDoS attacks bitcoin wallets and exchanges in recent months. Bitcoin and alt.coins exchange BTC-e suffered a DDoS attack in January. BTCC, the Shanghai, China-based digital currency exchange, suffered a DDoS attack at the end of last year. OkCoin, another exchange, was also the target of a DDoS attack in July. Source: https://www.cryptocoinsnews.com/bitgo-ddos-wirex-advisory/

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BitGo Under DDoS Attack; Wirex Advises Customers Not To Use Platform

NTP Patches Flaws That Enable DDoS

The network time protocol, at the center of a number of high-profile DDoS attacks in 2014, was updated on Thursday to ntp-4.2.8p8. The latest version includes patches for five vulnerabilities, including one rated high-severity. NTP, specifically the NTP daemon, synchronizes system clocks with time servers. Vulnerable NTP servers were used two years ago with regular frequency to carry out amplification attacks against targets. High-bandwidth NTP-based DDoS attacks skyrocketed as attackers used vulnerable NTP implementations to amplify DDoS attacks much in the way DNS amplification has been used in the past. Some NTP amplification attacks reached 400 Gbps in severity, enough to bring down even some of the better protected online services. US-CERT today released a vulnerability notification about the latest set of NTP vulnerabilities. “Exploitation of one of these vulnerabilities may allow a remote attacker to cause a denial-of-service condition,” the US-CERT advisory said. US-CERT also published a list vendors potentially vulnerable to attack; as of this afternoon, only the NTP project’s ntpd implementation is known to be affected. The status of the remainder of the A-Z list of vendors is characterized as unknown. “Unauthenticated, remote attackers may be able to spoof or send specially crafted packets to create denial of service conditions,” US-CERT said. One of the vulnerabilities, privately reported by Cisco, is a crypto-NAK crash or denial-of-service bug. Crypto-NAK responses are sent by NTP servers if a server and client do not agree on a message authentication code. The four remaining flaws were disclosed by Red Hat researchers. One is related to the crypto-NAK issue. “An attacker who knows the origin timestamp and can send a spoofed packet containing a CRYPTO-NAK to an ephemeral peer target before any other response is sent can demobilize that association,” an NTP.org bug report says. Another patch corrects a flaw where spoofed server packets were processed. “An attacker who is able to spoof packets with correct origin timestamps from enough servers before the expected response packets arrive at the target machine can affect some peer variables and, for example, cause a false leap indication to be set,” said the bug report. An autokey association reset flaw was also patched. Here an attacker who spoofs a packet with a correct origin timestamp before the response arrives can send a crypto-NAK or bad MAC and cause an association’s peer variables to be cleared, eventually preventing it from working correctly. The final vulnerability addressed is an issue where broadcast clients may be flipped into interleave mode. Source: NTP Patches Flaws That Enable DDoS https://wp.me/p3AjUX-uOO

Anonymous Announces #OpSilence, Month-Long Attacks on Mainstream Media

Members of the Ghost Squad Hackers team, one of most active Anonymous sub-divisions, have carried out DDoS attacks on CNN and FOX News as part of a new hacktivism campaign. Called OpSilence, the campaign’s goal is to attack all mainstream media that fails to report on the Palestine war or the true crimes happening in Syria, one of the hackers told Mic. #OpSilence will take place during the entire month of June 2016 The operation will be run similarly to #OpIcarus , a month-long series of attacks that took place in the month of May against various banks around the world. Any hacktivism group is welcomed to join, and the campaign comes on the heels of OpIcarus, which just ended yesterday. Ghost Squad Hackers didn’t wait for June to start to begin their attacks, and they’ve already hit the email servers of FOX News and CNN. The group has been changing tactics lately, switching from DDoSing public websites to attacking mail servers, as they did most recently against the Bank of England. Other hackers have taken a pro-Palestine stance before Taking a pro-Palestine stance isn’t something strange for hackers, many others supporting this cause as well. The previous group that did so was CWA (Crackas With Attitude), whose hacked targets include CIA Director John Brennan’s personal AOL email account, FBI Deputy Director Mark Giuliano, US National Intelligence Director James Clapper, and President Barack Obama’s Senior Advisor on science and technology John Holdren. The group is also responsible for hacking the JABS US national arrests database. They also leaked details for 2,400 US government officials, 80 Miami police officers, 9,000 DHS employees, and 20,000 FBI staffers. Back in February, the group’s leader, a sixteen-year-old boy, was arrested in East Midlands, England. Source: http://news.softpedia.com/news/anonymous-announces-opsilence-month-long-attacks-on-mainstream-media-504760.shtml

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Anonymous Announces #OpSilence, Month-Long Attacks on Mainstream Media