Network Security


NEWS 
  • HTTPS over HTTP: A Supply Chain Attack on Azure DevOps Server 2020

    April 13, 2021

    The need for data encryption during transmission has paved the way for organizations to rely on TLS — not just for sending data through the internet, but even within trusted corporate environments. Without the use of TLS or SSL, the authenticity of transmitted data and the identity of endpoint can’t be verified. In this blog, we ...

  • NAME:WRECK DNS vulnerabilities affect over 100 million devices

    April 13, 2021

    Security researchers today disclosed nine vulnerabilities affecting implementations of the Domain Name System protocol in popular TCP/IP network communication stacks running on at least 100 million devices. Collectively referred to as NAME: WRECK, the flaws could be leveraged to take offline affected devices or to gain control over them. The vulnerabilities were found in widespread TCP/IP stacks ...

  • Winter 2020 Network Attack Trends: Internet of Threats

    April 12, 2021

    Unit 42 researchers analyzed network attack trends over Winter 2020 and discovered many interesting exploits in the wild. During the period of Nov. 2020 to Jan. 2021, the majority of the attacks we observed were classified as critical (75%), compared to the 50.4% we reported in the fall of 2020. Several newly observed exploits, including ...

  • Critical security alert: If you haven’t patched old Fortinet VPN vulnerability, assume your network is compromised

    April 12, 2021

    Cyber criminals and nation-state cyber-espionage operations are actively scanning for unpatched vulnerabilities in Fortinet VPNs; organisations that use Fortigate firewalls on their network, and have yet to apply a critical security update released almost two years ago, should assume they’ve been compromised and act accordingly. The alert from the National Cyber Security Centre (NCSC) follows a ...

  • New Cring ransomware hits unpatched Fortinet VPN devices

    April 7, 2021

    A vulnerability impacting Fortinet VPNs is being exploited by a new human-operated ransomware strain known as Cring to breach and encrypt industrial sector companies’ networks. Cring ransomware (also known as Crypt3r, Vjiszy1lo, Ghost, Phantom) was discovered by Amigo_A in January and spotted by the CSIRT team of Swiss telecommunications provider Swisscom. The Cring operators drop customized Mimikatz ...

  • FBI: APTs Actively Exploiting Fortinet VPN Security Holes

    April 3, 2021

    The FBI and the Cybersecurity and Infrastructure Security Agency are warning that advanced persistent threat (APT) nation-state actors are actively exploiting known security vulnerabilities in the Fortinet FortiOS cybersecurity operating system, affecting the company’s SSL VPN products. According to an alert issued Friday by the FBI and CISA, cyberattackers are scanning devices on ports 4443, 8443 ...

  • Hancitor’s Use of Cobalt Strike and a Noisy Network Ping Tool

    April 1, 2021

    Hancitor is an information stealer and malware downloader used by a threat actor designated as MAN1, Moskalvzapoe or TA511. In a threat brief from 2018, we noted Hancitor was relatively unsophisticated, but it would remain a threat for years to come. Approximately three years later, Hancitor remains a threat and has evolved to use tools ...

  • Critical netmask networking bug impacts thousands of applications

    March 28, 2021

    Popular npm library netmask has a critical networking vulnerability. Netmask is frequently used by hundreds of thousands of applications to parse IPv4 addresses and CIDR blocks or compare them. The component gets over 3 million weekly downloads, and as of today, has scored over 238 million total downloads over its lifetime. Further, about 278,000 GitHub repositories depend ...

  • Cisco Plugs Security Hole in Small Business Routers

    March 17, 2021

    A popular line of small business routers made by Cisco Systems are vulnerable to a high-severity vulnerability. If exploited, the flaw could allow a remote – albeit authenticated – attacker to execute code or restart affected devices unexpectedly. Cisco issued fixes on Wednesday for the flaw in its RV132W ADSL2+ Wireless-N VPN routers and RV134W VDSL2 ...

  • New Mirai Variant Targeting Network Security Devices

    March 15, 2021

    On Feb. 23, 2021, one of the IPs involved in the attack was updated to serve a Mirai variant leveraging CVE-2021-27561 and CVE-2021-27562, mere hours after vulnerability details were published. On March 3, 2021, the same samples were served from a third IP address, with the addition of an exploit leveraging CVE-2021-22502. Furthermore, on March ...

  • D-Link, IoT Devices Under Attack By Tor-Based Gafgyt Variant

    March 5, 2021

    Researchers have discovered what they say is the first variant of the Gafgyt botnet family to cloak its activity using the Tor network. Gafgyt, a botnet that was uncovered in 2014, has become infamous for launching large-scale distributed denial-of-service (DDoS) attacks. Researchers first discovered activity from the newest variant, which they call Gafgyt_tor, on Feb. 15. In ...

  • Fast Flux 101: How Cybercriminals Improve the Resilience of Their Infrastructure to Evade Detection and Law Enforcement Takedowns

    March 2, 2021

    Fast flux is a technique used by cybercriminals to increase their infrastructure’s resilience by making law enforcement takedown of their servers and blocklisting of their IP addresses harder. It is critical for these cybercriminals to maintain their networks’ uptime to avoid losses to their revenue streams, including phishing and scam campaigns, botnet rental and illegal ...

  • Cybersecurity firm Genua fixes a critical flaw in its GenuGate High Resistance Firewall

    March 1, 2021

    Germany-based cybersecurity company Genua has fast-tracked a fix for a critical flaw in one of its firewall products. If exploited, the vulnerability could allow local attackers to bypass authentication measures and log in to internal company networks with the highest level of privileges. Genua says it offers more than 20 security solutions for encrypting data communication ...

  • SonicWall releases additional update for SMA 100 vulnerability

    February 20, 2021

    SonicWall has released a second firmware update for an SMA-100 zero-day vulnerability known to be used in attacks and is warning to install it immediately. Last month, SonicWall disclosed that their internal systems were attacked using a zero-day vulnerability in their SMA-100 remote access devices. A week later, cybersecurity firm NCC Group discovered the zero-day vulnerability used ...

  • Gauging LoRaWAN Communication Security with LoraPWN

    February 19, 2021

    LoRaWAN technology allows organizations to deploy the internet of things solutions at a much lower cost than existing cellular infrastructure solutions. Because of this, enterprises and smart cities around the world have started using LoRaWAN in their operations. As mentioned in the first article of this series, LoRaWAN technology has been used in infrastructure management, ...

  • Industrial Remote Access: Why It’s Not Something to Fear

    February 18, 2021

    Increased uptime? Check. Better access to outside expertise? Check. Improved first-time-fix rate? Check. These are just some of the benefits of industrial remote access. Yet many customers are reluctant to embrace remote access. Not only that, but incidents such as the breach at the Oldsmar water utility might increase organizations’ reluctance to use remote access. Using Oldsmar ...

  • Shining a Light on SolarCity: Practical Exploitation of the X2e IoT Device

    February 17, 2021

    In 2019, Mandiant’s Red Team discovered a series of vulnerabilities present within Digi International’s ConnectPort X2e device, which allows for remote code execution as a privileged user. Specifically, Mandiant’s research focused on SolarCity’s (now owned by Tesla) rebranded ConnectPort X2e device, which is used in residential solar installations. Mandiant performs this type of work both ...

  • Cybersecurity Risks of Connected Cars

    February 16, 2021

    As the use of connected cars becomes more common, the technologies that power or support these vehicles continue to evolve. This provides a host of benefits, but just like any other technology, this new territory comes with some risks. In our paper, we add some substantial information to our research from last year, in order ...

  • Fortinet fixes critical vulnerabilities in SSL VPN and web firewall

    February 7, 2021

    Fortinet has fixed multiple severe vulnerabilities impacting its products. The vulnerabilities range from Remote Code Execution (RCE) to SQL Injection, to Denial of Service (DoS) and impact the FortiProxy SSL VPN and FortiWeb Web Application Firewall (WAF) products. Multiple advisories published by FortiGuard Labs this month and in January 2021 mention various critical vulnerabilities that Fortinet has ...

  • Signal ignores proxy censorship vulnerability, bans researchers

    February 7, 2021

    Signal, an end-to-end encrypted messaging platform was recently blocked by the Iranian government. To help its users bypass censorship in Iran, the company suggested a TLS proxy workaround. However, multiple researchers have now discovered flaws in the workaround that can let a censor or government authority probe into Signal TLS proxies, rendering these protections moot and potentially ...