Yelp: Email flooding using user invitation feature in biz.yelp.com due to lack of rate limiting

Summary: Hello everyone, The feature to invite users to manage your business has no rate limiting or captcha implemented. Therefore, a malicious user can use this to mail bomb any email's inbox with invitation requests. Platforms Affected: biz.yelp.com Steps To Reproduce: This is a pretty straigh...

Imperva mitigates largest DDoS attacks of 2020… so far…

The word “unprecedented” has never been used so much as it has during 2020. And in the latest of many unprecedented events, July saw the two largest recorded DDoS attacks of the year so far. As revealed in our July 2020 Cyber Threat Index Report, published today, Imperva Research Labs recorded tw...

Beers with Talos Ep. #90: Hacktivism – Understanding the real-world consequences

Beers with Talos BWT Podcast episode No. 90 is now available. Download this episode and subscribe to Beers with Talos:Apple Podcasts Google PodcastsSpotify StitcherIf iTunes and Google Play aren't your thing, click here. By Mitch Neff. Recorded July 31, 2020 This week in BWT land, we’re discussin...

Ransom Demands Return: New DDoS Extortion Threats From Old Actors Targeting Finance and Retail

Update 08/24/2020 As mentioned below, the Akamai SIRT has been tracking attacks from the so-called Armada Collective and Fancy Bear actors, who are sending ransom letters to various industry verticals such as finance, travel, and e-commerce. In addition to the...

DDoS Attacks Cresting Amid Pandemic

The number of distributed denial-of-service DDoS attacks spiked in the second quarter of 2020, researchers said. According to the latest Kaspersky quarterly DDoS attacks report, DDoS events were three times more frequent in comparison to the second quarter last year up 217 percent, and were up 30...

Fast, Furious, and Scalable: Designing a High-throughput, Real-time Network Traffic Analyzer

These days, our focus is on spoiling our customers. For example, we give our DDoS Protection customers the peace of mind that their network traffic is routing through Impervas cloud for consistent volumetric attack protection. That protection works pretty well, but customers have started asking u...

DDoS attacks in Q2 2020

News overview Not just one but two new DDoS amplification methods were discovered last quarter. In mid-May, Israeli researchers reported a new DNS server vulnerability that lurks in the DNS delegation process. The vulnerability exploitation scheme was dubbed "NXNSAttack". The hacker sends to a...

Exploit for Incorrect Default Permissions in Ui Unifi_Controller

This is a PoC exploit for CVE-2020-12695, a vulnerability in the CallStranger protocol. The exploit is implemented in Python and uses the upnpy library for UPnP communication. The script is designed to simulate data exfiltration, bypassing DLP Data Loss Prevention systems, and can also be used to...

Amazon Linux 2 : dnsmasq (ALAS-2020-1469)

The version of dnsmasq installed on the remote host is prior to 2.76-10. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2020-1469 advisory. A flaw was found in the default configuration of dnsmasq, as shipped with Fedora and Red Hat Enterprise Linux, where it listens on...

Black Hat 2020: Linux Spyware Stack Ties Together 5 Chinese APTs

A stack of Linux backdoor malware used for espionage, compiled dynamically and customizable to specific targets, is being used as a shared resource by five different Chinese-language APT groups, according to researchers. According to an analysis from BlackBerry released at Black Hat 2020 on...

Medium: dnsmasq

Issue Overview: A flaw was found in the default configuration of dnsmasq, as shipped with Fedora and Red Hat Enterprise Linux, where it listens on any interface and accepts queries from addresses outside of its local subnet. In particular, the option local-service is not enabled. Running dnsmasq ...

Updated dnsmasq packages fix security vulnerability

Updated dnsmasq package fix insecure default configuration potentially making it an open resolver CVE-2020-14312. In its default configuration, dnsmasq listen and answer query from any address even outside of the local subnet. Thus, it may inadvertently become an open resolver which might be used...

Large, Complex DDoS Attacks on the Rise in 2020

While we've highlighted both record PPS and BPS attacks mitigated on the Akamai Prolexic Platform over the past few weeks, these attacks are part of a broader trend of increasingly large and complex DDoS activity. We have seen clear indications across the industry of high-water mark DDoS attacks...

Large, Complex DDoS Attacks on the Rise in 2020

While we've highlighted both record PPS and BPS attacks mitigated on the Akamai Prolexic Platform over the past few weeks, these attacks are part of a broader trend of increasingly large and complex DDoS activity. We have seen clear indications across the industry of high-water mark DDoS attacks...

Imperva Shields Against Windows DNS Server RCE Vulnerability (CVE-2020-1350)

Recently, Check Point researchers found a 17-year-old high-profile flaw, SIGRed CVE-2020-1350. The flaw is a wormable, critical vulnerability in the Windows DNS server, and can be triggered by a malicious DNS response. On a zero to 10 scale, this vulnerability has received a CVSS base score of 10...

The Anatomy of Massive Application Layer DDoS Attacks

During 2020 between June 18 and June 24 Imperva mitigated massive 200K RPS Request Per Second attacks on a daily basis. Here at Imperva we investigate major attacks we mitigated in order to gain a better understanding of their anatomy and allow for smarter mitigation. In this blog post we’ll...

This Week in Security News: Trend Micro Research Discovers Cybercriminal Turf War on Routers and a Massive Twitter Breach Compromises Some of the World’s Most Prominent Accounts

Welcome to our weekly roundup, where we share what you need to know about the cybersecurity news and events that happened over the past few days. This week, read about Trend Micro’s report on the botnet battle for IoT territory and how attacker groups are trying to gain control of vulnerable...

‘DDoS-For-Hire’ Is Fueling a New Wave of Attacks

Turf wars are heating up over the routers that fuel distributed denial of service attacks—and cybermercenaries are running rampant...

DDoS Protection for Networks: Combatting Local Preference from ISPs

One of the most common issues we have seen when onboarding customers to our DDoS Protection for Networks service is when a customer’s ISP implements a high local preference. This prevents the Internet from recognizing that Imperva is the best path. Local Preference Local preference is one of the...

FastNetMon Community - Very Fast DDoS Analyzer With Sflow/Netflow/Mirror Support

FastNetMon - A high performance DoS/DDoS load analyzer built on top of multiple packet capture engines NetFlow, IPFIX, sFlow, AFPACKET, SnabbSwitch, netmap, PFRING obsoleted, PCAP. What do we do? We detect hosts in the deployed network sending or receiving large volumes of traffic,...