Attacks

CISA is responding to active exploitation of Unitronics programmable logic controllers (PLCs) used in the Water and Wastewater Systems (WWS) Sector. Cyber threat actors are targeting PLCs associated with WWS facilities, including an identified Unitronics PLC, at a U.S. water facility. In response, the affected municipality’s water authority immediately took the system offline and switched to manual operations—there is no known risk to the municipality’s drinking water or water supply. WWS Sector facilities use PLCs…

Today, in a landmark collaboration, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) and the UK National Cyber Security Centre (NCSC) are proud to announce the release of the Guidelines for Secure AI System Development. Co-sealed by 23 domestic and international cybersecurity organizations, this publication marks a significant step in addressing the intersection of artificial intelligence (AI), cybersecurity, and critical infrastructure. The Guidelines, complementing the U.S. Voluntary Commitments on Ensuring Safe, Secure, and Trustworthy AI,…

Mozilla has released security updates to address vulnerabilities in Firefox and Thunderbird. A cyber threat actor could exploit some of these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review the following advisories and apply the necessary updates: Firefox iOS 120 Firefox 120 Firefox ESR 115.5 Thunderbird 115.5.0

Today, the Cybersecurity and Infrastructure Security Agency (CISA), Federal Bureau of Investigation (FBI), Multi-State Information Sharing & Analysis Center (MS-ISAC), and Australian Signals Directorate’s Australian Cyber Security Center (ASD’s ACSC) released a joint Cybersecurity Advisory (CSA), #StopRansomware: LockBit Ransomware Affiliates Exploit CVE 2023-4966 Citrix Bleed Vulnerability (along with an accompanying analysis report MAR-10478915-1.v1 Citrix Bleed), in response to LockBit 3.0 ransomware affiliates and multiple threat actor groups exploiting CVE-2023-4966. Labeled Citrix Bleed, the vulnerability affects Citrix’s NetScaler…

Today, CISA released the Mitigation Guide: Healthcare and Public Health (HPH) Sector as a supplemental companion to the HPH Cyber Risk Summary, published July 19, 2023. This guide provides defensive mitigation strategy recommendations and best practices to combat pervasive cyber threats affecting this critical infrastructure sector. It also identifies known vulnerabilities for organizations to assess their networks and minimize risks before intrusions occur.  For more information and resources, HPH entities are encouraged to visit CISA’s…

Juniper released a security advisory to address multiple vulnerabilities affecting Juniper Secure Analytics. A cyber threat actor could exploit one of these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review the Juniper advisory JSA74298 and apply the necessary updates.

Today, the Federal Bureau of Investigation (FBI) and the Cybersecurity and Infrastructure Security Agency (CISA) released a joint Cybersecurity Advisory (CSA) on Scattered Spider—a cybercriminal group targeting commercial facilities sectors and subsectors. The advisory provides tactics, techniques, and procedures (TTPs) obtained through FBI investigations as recently as November 2023. Scattered Spider threat actors typically engage in data theft for extortion using multiple social engineering techniques and have recently leveraged BlackCat/ALPHV ransomware alongside their usual TTPs.…

CISA has opened a 30-day Federal Register notice to receive public comment on the draft Secure Software Development Attestation Form. CISA developed this form in coordination with the Office of Management and Budget. With the Secure Software Development Attestation Form, federal departments and agencies will be able to obtain attestation of product security from a software producer before using the software on government systems. This form will establish a standardized process for the federal government…