Network Security


NEWS 
  • Play Your Cards Right: Detecting Wildcard DNS Abuse

    December 1, 2021

    The domain name system (DNS) maps names to addresses so that computers can communicate. The directions within the DNS exist largely in records where a specific name (such as paloaltonetworks.com) is mapped to pieces of data, such as IP addresses (for example, 34.107.151202). As the name suggests, wildcard DNS records are an exception to this ...

  • Web trust dies in darkness: Hidden Certificate Authorities undermine public crypto infrastructure

    November 19, 2021

    Security researchers have checked the web’s public key infrastructure and have measured a long-known but little-analyzed security threat: hidden root Certificate Authorities. Certificate Authorities, or CAs, vouch for the digital certificates we use to establish trust online. You can be reasonably confident that your bank website is actually your bank website when it presents your browser ...

  • FBI: An APT Group Exploiting a 0-day in FatPipe WARP, MPVPN, and IPVPN Software

    November 17, 2021

    As of November 2021, FBI forensic analysis indicated exploitation of a 0-day vulnerability in the FatPipe MPVPN® device software1 going back to at least May 2021. The vulnerability allowed APT actors to gain access to an unrestricted file upload function to drop a webshell for exploitation activity with root access, leading to elevated privileges and ...

  • Security company faces backlash for waiting 12 months to disclose Palo Alto 0-day

    November 12, 2021

    There has been considerable debate within the cybersecurity community about Randori, a security firm that waited one year before disclosing a critical buffer overflow bug it discovered in Palo Alto Networks’ GlobalProtect VPN. The zero-day — which has a severity rating of 9.8 and was first reported by ZDNet — allows for unauthenticated, remote code execution ...

  • A Peek into Top-Level Domains and Cybercrime

    November 11, 2021

    Top-level domains (TLDs), such as .com, .net, .xxx and .hu, sit at the highest level of the domain name system (DNS) naming hierarchy. When users want to acquire domain names (e.g., paloaltonetworks.com), typically, they need to register them under a TLD directly or one level lower (e.g., google.co.uk). Properties and policies of TLDs such as ...

  • Massive Zero-Day Hole Found in Palo Alto Security Appliances

    November 10, 2021

    UPDATE: Researchers have a working exploit for the vulnerability (now patched), which allows for unauthenticated RCE and affects what Palo Alto clarified is an estimated 10,000 VPN/firewalls. Researchers have developed a working exploit to gain remote code execution (RCE) via a massive vulnerability in a security appliance from Palo Alto Networks (PAN), potentially leaving 10,000 vulnerable ...

  • Critical Citrix DDoS Bug Shuts Down Network, Cloud App Access

    November 10, 2021

    A critical security bug in the Citrix Application Delivery Controller (ADC) and Citrix Gateway could allow cyberattackers to crash entire corporate networks without needing to authenticate. The two affected Citrix products (formerly the NetScaler ADC and Gateway) are used for application-aware traffic management and secure remote access, respectively. The federated working specialist pushed out a security ...

  • Cloudflare report highlights devastating DDoS attacks on VoIP services and several ‘record-setting HTTP attacks’

    November 5, 2021

    Cloudflare released its Q3 DDoS Attack Trends report this week, capping a record-setting quarter that saw a number of devastating attacks on VoIP services. Cloudflare researchers said they saw the several “record-setting HTTP DDoS attacks, terabit-strong network-layer attacks and one of the largest botnets ever deployed (Meris),” noting the emergence of ransom DDoS attacks on voice ...

  • Cring ransomware continues assault on industrial organizations with aging applications, VPNs

    November 1, 2021

    The Cring ransomware group continues to make a name for itself through attacks on aging ColdFusion servers and VPNs after emerging earlier this year. Experts like Digital Shadows Sean Nikkel told ZDNet that what makes Cring interesting is that so far, they appear to specialize in using older vulnerabilities in their attacks. “In a previous incident, Cring ...

  • Network Scanning Traffic Observed in Public Clouds

    October 28, 2021

    Tracking network scanning activities can help researchers understand which services are being targeted. By monitoring the origins of the scanners, researchers can also identify compromised endpoints. If a host belonging to a known organization suddenly starts to scan a part of the internet, it is a strong indicator that the host is compromised. This blog summarizes ...

  • Lyceum group reborn

    October 18, 2021

    This year, Kaspersky researchers presented their research into the Lyceum group (also known as Hexane), which was first exposed by Secureworks in 2019. In 2021, we have been able to identify a new cluster of the group’s activity, focused on two entities in Tunisia. According to older public accounts of the group’s activity, Lyceum conducted targeted ...

  • Security Risks with Private 5G in Manufacturing Companies Part. 2

    October 15, 2021

    The steel industry is a prime area for installing Private 5G Private 5G is said to bring about the “democratization of communications.” This technology allows private companies and local governments to take the driving seat in operating the latest information communication systems. However, not all organizations have the knowledge and ability to deal with telecom technology, ...

  • Apache Web Server Zero-Day Exposes Sensitive Data

    October 5, 2021

    Apache Software has quickly issued a fix for a zero-day security bug in the Apache HTTP Server, which was first reported to the project last week. The vulnerability is under active exploitation in the wild, it said, and could allow attackers to access sensitive information. According to a security advisory issued on Monday, the issue (CVE-2021-41773) ...

  • Facebook Blames Outage on Faulty Router Configuration

    October 5, 2021

    As of Monday night, Facebook had crawled back from what may have been its longest blackout ever and apologized for the mass outage that left billions of users locked out of Facebook, Instagram, WhatsApp, Messenger and Oculus VR for about six hours. In a Monday night blog post, Santosh Janardhan Facebook’s vice president of infrastructure gave ...

  • NSA-CISA Guidance: Selecting and Hardening Remote Access VPN Solutions

    September 30, 2021

    Virtual Private Networks (VPNs) allow users to remotely connect to a corporate network via a secure tunnel. Through this tunnel, users can take advantage of the internal services and protections normally offered to on-site users, such as email/collaboration tools, sensitive document repositories, and perimeter firewalls and gateways. Because remote access VPN servers are entry points into protected networks, they ...

  • Dangling Domains: Security Threats, Detection and Prevalence

    September 16, 2021

    The Domain Name System (DNS) provides the naming service which maps mnemonic domain names to various resources such as IP addresses, email servers and so on. As one of the most fundamental internet components, DNS and domain names usually serve as trusted anchors for users to access desired internet resources. As a result, threat actors ...

  • SOVA, Worryingly Sophisticated Android Trojan, Takes Flight

    September 10, 2021

    A new Android banking trojan named SOVA (“owl” in Russian) is under active development, researchers said, and it has big dreams even in its infancy stage. The malware is looking to incorporate distributed denial of service (DDoS), man in the middle (MiTM) and ransomware functionality into its arsenal – on top of existing banking overlay, ...

  • Hackers leak passwords for 500,000 Fortinet VPN accounts

    September 8, 2021

    A threat actor has leaked a list of almost 500,000 Fortinet VPN login names and passwords that were allegedly scraped from exploitable devices last summer. While the threat actor states that the exploited Fortinet vulnerability has since been patched, they claim that many VPN credentials are still valid. This leak is a serious incident as the VPN ...

  • Netgear Smart Switches Open to Complete Takeover

    September 7, 2021

    Three severe Netgear vulnerabilities, codenamed Demon’s Cries, Draconian Fear and Seventh Inferno by the researcher that found them, affect 20 of the company’s managed smart switches and could allow an attacker to take them over. The bugs were patched on Friday with zero technical details made available, but the researcher has now released more details on ...

  • Analyzing SSL/TLS Certificates Used by Malware

    September 3, 2021

    Malware has increasingly been making use of encryption to help hide their network traffic in recent years. This makes sense especially when one realizes that ordinary network traffic is increasingly encrypted as well. Google’s own Transparency Report notes that HTTPS traffic now makes up the vast majority of network traffic passed via the Google Chrome ...