Attacks

Cisco released a security advisory to address multiple vulnerabilities affecting the web-based user interface of certain Cisco Small Business Series Switches. A remote attacker could exploit these vulnerabilities to cause a denial-of-service condition or execute arbitrary code with root privileges on an affected device. CISA encourages users and administrators to review the following advisory and apply the necessary updates: •    Cisco Small Business Series Switches Buffer Overflow Vulnerabilities For updates addressing lower severity vulnerabilities, see…

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CISA released five Industrial Control Systems (ICS) advisories on May 16, 2023. These advisories provide timely information about current security issues, vulnerabilities, and exploits surrounding ICS.  ICSA-23-138-01 Carlo Gavazzi Powersoft ICSA-23-138-02 Mitsubishi Electric MELSEC WS ICSA-23-138-03 Hitachi Energy MicroSCADA Pro/X SYS600 ICSA-23-138-04 Johnson Controls OpenBlue Enterprise Manager Data Collector ICSA-20-051-02 Rockwell Automation FactoryTalk Diagnostics Update B   CISA encourages users and administrators to review the newly released ICS advisories for technical details and mitigations.

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CISA, the Federal Bureau of Investigation (FBI), and the Australian Cyber Security Centre (ACSC) have released a joint Cybersecurity Advisory (CSA) with known BianLian ransomware and data extortion group technical details. Microsoft and Sophos contributed to the advisory. To reduce the likelihood and impact of BianLian and other ransomware incidents, CISA encourages organizations to implement mitigations recommended in this advisory. Mitigations align with the Cross-Sector Cybersecurity Performance Goals (CPGs) developed by CISA and the National Institute of…

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CISA and FBI have released a joint Cybersecurity Advisory (CSA), Malicious Actors Exploit CVE-2023-27350 in PaperCut MF and NG. This joint advisory provides details related to an exploitation of PaperCut MF/NG vulnerability (CVE-2023-27350). FBI observed malicious actors exploit CVE-2023-27350 beginning in mid-April 2023 and continuing through the present. In early May 2023, FBI observed a group self-identifying as the Bl00dy Ransomware Gang attempting to exploit vulnerable PaperCut servers against the Education Facilities Subsector. The advisory further…

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Today, CISA and partners released a joint advisory for a sophisticated cyber espionage tool used by Russian cyber actors. Hunting Russian Intelligence “Snake” Malware provides technical descriptions of the malware’s host architecture and network communications, and mitigations to help detect and defend against this threat. CISA urges organizations to review the advisory for more information and apply the recommended mitigations and detection guidance. For more information on FSB and Russian state-sponsored cyber activity, please see…

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Mozilla has released security advisories to address vulnerabilities in Firefox and Firefox ESR. 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: Security Vulnerabilities fixed in Firefox 113 Mozilla Foundation Security Advisory 2023-16 Security Vulnerabilities fixed in Firefox ESR 102.11 Mozilla Foundation Security Advisory 2023-17 For updates addressing lower severity vulnerabilities, see the…

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Microsoft has released updates to address multiple vulnerabilities in Microsoft software. An attacker can exploit some of these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review Microsoft’s May 2023 Security Update Guide and Deployment Information and apply the necessary updates.

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