A new report from the Acronis Threat Research Unit has uncovered a vulnerability in Microsoft Exchange Online settings that could enable email spoofing attacks.
This issue primarily affects users with a hybrid configuration of on-premises Exchange and Exchange Online, and those utilizing third-party email security solutions. In July 2023, Microsoft introduced a major change in how it handles DMARC (Domain-based Message Authentication, Reporting, and Conformance) within Microsoft Exchange. This update was intended to bolster security by enhancing how email servers verify incoming emails’ legitimacy. Unfortunately, despite clear guidance from Microsoft, a considerable number of users have yet to implement these security measures.
Read more…
Source: TechRadar News
Related:
- CISA Releases IOCs Associated with Malicious Barracuda Activity
August 29, 2023
CISA has released additional indicators of compromise (IOCs) associated with exploitation of CVE-2023-2868. CVE-2023-2868 is a remote command injection vulnerability affecting Barracuda Email Security Gateway (ESG) Appliance, versions 5.1.3.001-9.2.0.006. Malicious threat actors exploited this vulnerability as a zero day as early as October 2022 to gain access to ESG appliances. Read more… Source: U.S. Cybersecurity and Infrastructure ...
- CISA Releases Six Industrial Control Systems Advisories
August 24, 2023
CISA released six Industrial Control Systems (ICS) advisories on August 24, 2023. These advisories provide timely information about current security issues, vulnerabilities, and exploits surrounding ICS. ICSA-23-236-01 KNX Protocol ICSA-23-236-02 Opto 22 SNAP PAC S1 Read more… Source: U.S. Cybersecurity and Infrastructure Security Agency Related story: CISA Adds Two Known Exploited Vulnerabilities to Catalog
- CISA Releases Four Industrial Control Systems Advisories
August 22, 2023
CISA released four Industrial Control Systems (ICS) advisories on August 22, 2023. These advisories provide timely information about current security issues, vulnerabilities, and exploits surrounding ICS. ICSA-23-234-01 Hitachi Energy AFF66x ICSA-23-234-02 Trane Thermostats Read more… Source: U.S. Cybersecurity and Infrastructure Security Agency
- CISA Releases Three Industrial Control Systems Advisories
August 17, 2023
CISA released three Industrial Control Systems (ICS) advisories on August 17, 2023. These advisories provide timely information about current security issues, vulnerabilities, and exploits surrounding ICS. ICSA-23-229-01 ICONICS and Mitsubishi Electric Products Read more… Source: U.S. Cybersecurity and Infrastructure Security Agency
- Atlassian Releases Security Update for Confluence Server and Data Center
August 17, 2023
Atlassian has released its security bulletin for August 2023 to address a vulnerability in Confluence Server and Data Center, CVE-2023-28709. A remote attacker can exploit this vulnerability to cause a denial-of-service condition. CISA encourages users and administrators to review Atlassian’s August 2003 Security Bulletin and apply the necessary update. Read more… Source: U.S. Cybersecurity and Infrastructure Security Agency
- Patch-resistant autonomous exploits of Citrix NetScaler hardware hit thousands in Europe
August 17, 2023
Researchers have found an expansive and active threat campaign that exploited a severe Citrix NetScaler vulnerability to backdoor thousands of devices, including those that were subsequently patched. Attackers automated the exploitation of the remote code execution vulnerability, tracked as CVE-2023-3519, to place Web shells on vulnerable devices. These were found to persist through patches and reboots. Read ...