Network Security

NEWS 
  • OpenAI Blames ChatGPT’s Intermittent Outages On ‘Abnormal Traffic’ That Suggests Potential Cyber Attack

    November 9, 2023

    ChatGPT continued to face intermittent outages late Wednesday, which the platform’s maker OpenAI blamed on a potential cyberattack, hours after the AI chatbot platform recovered from a wide outage that the company initially attributed to a surge in interest for its new features. Early on Thursday, OpenAI’s service status page displayed a notification saying both ChatGPT ...

  • Understanding DNS Tunneling Traffic in the Wild

    October 13, 2023

    Palo Alto Unit 42 researchers present a study on why and how domain name system (DNS) tunneling techniques are used in the wild. Motivated by their findings, they present a system to automatically attribute tunneling domains to tools and campaigns. Attackers adopt DNS tunneling techniques to bypass security policies in enterprise networks because most enterprises ...

  • curl SOCKS5 heap overflow vulnerability

    October 13, 2023

    Client URL, or curl, and its library version libcurl are one of the most popular and integrated command line tools for data transfer. They support a wide range of protocols such as HTTP, HTTPS, SMTP and FTP and enable the user to make requests to a URL while handling all standard components of requests such ...

  • Akira ransomware overview

    October 12, 2023

    Akira is a relatively new ransomware variant with Windows and Linux versions that came out in April 2023. Like many attackers, the gang behind this variant only uses the ransomware to encrypt files after first breaking into a network and stealing data. This group also employs a double extortion tactic, demanding a ransom from victims ...

  • 10 zero-day vulnerabilities in industrial cell router could lead to code execution, buffer overflows

    October 11, 2023

    Cisco Talos recently disclosed 11 vulnerabilities, 10 of which are zero-days without a patch in an industrial cellular router. Attackers could exploit these vulnerabilities in the Yifan YF325 to carry out a variety of attacks, in some cases gaining the ability to execute arbitrary shell commands on the targeted device. The one other security issue Talos ...

  • How it works: The novel HTTP/2 ‘Rapid Reset’ DDoS attack

    October 10, 2023

    A number of Google services and Cloud customers have been targeted with a novel HTTP/2-based DDoS attack which peaked in August. These attacks were significantly larger than any previously-reported Layer 7 attacks, with the largest attack surpassing 398 million requests per second. The attacks were largely stopped at the edge of our network by Google’s ...

  • IZ1H9 Campaign Enhances Its Arsenal with Scores of Exploits

    October 9, 2023

    In September 2023, our FortiGuard Labs team observed that the IZ1H9 Mirai-based DDoS campaign has aggressively updated its arsenal of exploits. Thirteen payloads were included in this variant, including D-Link devices, Netis wireless router, Sunhillo SureLine, Geutebruck IP camera, Yealink Device Management, Zyxel devices, TP-Link Archer, Korenix Jetwave, and TOTOLINK routers. Based on the trigger counts ...

  • NSA, FBI, CISA, and Japanese Partners Release Advisory on PRC-Linked Cyber Actors

    September 27, 2023

    Today, the U.S. National Security Agency (NSA), Federal Bureau of Investigation (FBI), and Cybersecurity and Infrastructure Security Agency (CISA), along with the Japan National Police Agency (NPA) and the Japan National Center of Incident Readiness and Strategy for Cybersecurity (NISC) released joint Cybersecurity Advisory (CSA) People’s Republic of China-Linked Cyber Actors Hide in Router Firmware. The ...

  • ICS protocol coverage using Snort 3 service inspectors

    September 26, 2023

    With more devices on operational technology (OT) networks now getting connected to wide-reaching IT networks, it is more important than ever to have effective detection capabilities for ICS protocols. However, there are a few issues that usually arise when creating detection for ICS protocol traffic. Oftentimes, the protocols connecting these devices on modern networks originate ...

  • CISA Releases Update to Threat Actors Exploiting Citrix CVE-2023-3519 to Implant Webshells

    September 6, 2023

    The Cybersecurity and Infrastructure Security Agency (CISA) has released an update to a previously published Cybersecurity Advisory (CSA), Threat Actors Exploiting Citrix CVE-2023-3519 to Implant Webshells. The CSA—originally released to warn network defenders of critical infrastructure organizations about threat actors exploiting CVE-2023-3519, an unauthenticated remote code execution (RCE) vulnerability affecting NetScaler (formerly Citrix) Application Delivery ...