Attacks

Today, CISA, the Federal Bureau of Investigation (FBI), Europol’s European Cybercrime Centre (EC3), and the Netherlands’ National Cyber Security Centre (NCSC-NL) released a joint Cybersecurity Advisory (CSA), #StopRansomware: Akira Ransomware, to disseminate known Akira ransomware tactics, techniques, and procedures (TTPs) and indicators of compromise (IOCs) identified through FBI investigations as recently as February 2024. Evolving from an initial focus on Windows systems to a Linux variant targeting VMware ESXi virtual machines, Akira threat actors began…

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Today, the National Security Agency’s Artificial Intelligence Security Center (NSA AISC) published the joint Cybersecurity Information Sheet Deploying AI Systems Securely in collaboration with CISA, the Federal Bureau of Investigation (FBI), the Australian Signals Directorate’s Australian Cyber Security Centre (ASD ACSC), the Canadian Centre for Cyber Security (CCCS), the New Zealand National Cyber Security Centre (NCSC-NZ), and the United Kingdom’s National Cyber Security Centre (NCSC-UK). The guidance provides best practices for deploying and operating externally…

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Juniper has released security updates to address multiple vulnerabilities in Junos OS, Junos OS Evolved, Paragon Active Assurance and Junos OS: EX4300 Series. A cyber threat actor could exploit some of these vulnerabilities to cause a denial-of-service condition. Users and administrators are encouraged to review Juniper’s Support Portal and apply the necessary updates.

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Palo Alto Networks has released workaround guidance for a command injection vulnerability (CVE-2024-3400) affecting PAN-OS versions 10.2, 11.0, and 11.1. Palo Alto Networks has reported active exploitation of this vulnerability in the wild.  CISA encourages users and administrators to review the Palo Alto Networks Security Advisory, apply the current mitigations, and update the affected software when Palo Alto Networks makes the fixes available.  CISA has also added this vulnerability to its Known Exploited Vulnerabilities Catalog.…

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Citrix released security updates to address multiple vulnerabilities in XenServer and Citrix Hypervisor. A cyber threat actor could exploit one of these vulnerabilities to take control of an affected system.  CISA encourages users and administrators to review and apply the necessary updates:  XenServer and Citrix Hypervisor Security Update for CVE-2023-46842, CVE-2024-2201 and CVE-2024-31142

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Today, CISA publicly issued Emergency Directive (ED) 24-02 to address the recent campaign by Russian state-sponsored cyber actor Midnight Blizzard to exfiltrate email correspondence of Federal Civilian Executive Branch (FCEB) agencies through a successful compromise of Microsoft corporate email accounts. This Directive rhttps://www.cisa.gov/news-events/directives/ed-24-02-mitigating-significant-risk-nation-state-compromise-microsoft-corporate-email-systemequires agencies to analyze the content of exfiltrated emails, reset compromised credentials, and take additional steps to secure privileged Microsoft Azure accounts. While ED 24-02 requirements only apply to FCEB agencies, other organizations…

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CISA is collaborating with private industry partners to respond to a recent compromise discovered by independent security researchers impacting Sisense, a company that provides data analytics services. CISA urges Sisense customers to: Reset credentials and secrets potentially exposed to, or used to access, Sisense services.  Investigate—and report to CISA—any suspicious activity involving credentials potentially exposed to, or used to access, Sisense services. CISA is taking an active role in collaborating with private industry partners to…

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Microsoft released security updates to address vulnerabilities in multiple products. A cyber threat actor could exploit some of these vulnerabilities to take control of an affected system.   Users and administrators are encouraged to review the following and apply the necessary updates:   Microsoft Security Update Guide for April

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Ivanti has released security updates to address vulnerabilities in all supported versions (9.x and 22.x) of Ivanti Connect Secure and Policy Secure gateways. A cyber threat actor could exploit one of these vulnerabilities to take control of an affected system.  Users and administrators are encouraged to review the following Ivanti advisory and apply the necessary updates:  SA:CVE-2024-21894 (Heap Overflow), CVE-2024-22052 (Null Pointer Dereference), CVE-2024-22053 (Heap Overflow) and CVE-2024-22023 (XML entity expansion or XXE) for Ivanti Connect…

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Today, CISA published a new dedicated High-Risk Communities webpage comprised of cybersecurity resources to support civil society communities at heighted risk of digital security threats, including cyber hygiene guidance, a repository of local cyber volunteer programs, and free or discounted tools and services. Despite their vulnerability to advanced cyber threats, many civil society organizations operate on lean budgets and cannot significantly invest in cybersecurity. CISA’s High-Risk Communities webpage provides resources specifically for civil society organizations,…

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