The Hacker News - Most Trusted Cyber Security and Computer Security Analysis: Search results for DNS resolver

Knock v1.5  - Subdomain Scanner , allows to bypass wildcard Knock is a python script, written by Gianni 'guelfoweb' Amato, designed to enumerate subdomains on a target domain through a wordlist. This program is self contained, doesn't need to be installed in any particular location. All it needs is a recent version of Python 2.xOnly for use the Zone Transfer option (-zt) you must install the module dnspython, otherwise you can do without. If the name server allows zone transfers to occur, all the DNS names and IP addresses hosted by the name server will be returned in human-readable ASCII text. Usage $ python knock.py <option> <url> Rapid Scan Scanning with internal wordlist: $ python knock.py <url> Scanning with external wordlist: $ python knock.py <url> <wordlist> Options -zt Zone Transfer discovery: $ python knock.py -zt <url> -dns Dns resolver: $ python knock.py -dns <url> -wc Wildcard testing: $ python knock.py

Distributed Denial of Service attacks have increased in scale, intensity and frequency. The wide range of motives for these attacks political , criminal, or social makes every merchant or organization with an online presence a potential target. Over the weekend Incapsula mitigated a unique DDoS attack against a large gaming website, in which they have discovered a DDoS attack using thousands of legitimate WordPress blogs without the need for them to be compromised. Incapsula released the list of approximately 2,500 WordPress sites from where the attack was originated, including some very large sites like Trendmicro.com, Gizmodo.it and Zendesk.com . In a recent report , we posted about another method for DDoS attacks using DNS amplification , where a DNS request is made to an open DNS resolver with the source IP address forged so that it is the IP address of the targeted site to which the response is thus sent, but this new method uses HTTP rather than DNS. The

The Department of Homeland Security and CISA ICS-CERT today issued a critical security advisory warning about over a dozen newly discovered vulnerabilities affecting billions of Internet-connected devices manufactured by many vendors across the globe. Dubbed " Ripple20 ," the set of 19 vulnerabilities resides in a low-level TCP/IP software library developed by Treck, which, if weaponized, could let remote attackers gain complete control over targeted devices—without requiring any user interaction. According to Israeli cybersecurity company JSOF—who discovered these flaws—the affected devices are in use across various industries, ranging from home/consumer devices to medical, healthcare, data centers, enterprises, telecom, oil, gas, nuclear, transportation, and many others across critical infrastructure. "Just a few examples: data could be stolen off of a printer, an infusion pump behavior changed, or industrial control devices could be made to malfunction. An

Juniper Networks has pushed security updates to address  several vulnerabilities  affecting multiple products, some of which could be exploited to seize control of affected systems. The most critical of the flaws affect Junos Space and Contrail Networking, with the tech company urging customers to update to release versions 22.1R1 and 21.4.0, respectively. Chief among them is a collection of 31 bugs in the Junos Space network management software, including CVE-2021-23017 (CVSS score: 9.4) that could result in a crash of vulnerable devices or even achieve arbitrary code execution. "A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or potential other impact," the company  said . The same security vulnerability has also been  remediated  in Northstar Controller in versions 5.1.0 Service Pack 6 and 6.2.2. Additionally, the