Msert hafnium5/19/2023 ![]() based Volexity for reporting the vulnerabilities. Microsoft’s initial advisory about the Exchange flaws credited Reston, Va. national security advisors on the attack told KrebsOnSecurity the Chinese hacking group thought to be responsible has seized control over “hundreds of thousands” of Microsoft Exchange Servers worldwide - with each victim system representing approximately one organization that uses Exchange to process email. Speaking on condition of anonymity, two cybersecurity experts who’ve briefed U.S. The espionage group is exploiting four newly-discovered flaws in Microsoft Exchange Server email software, and has seeded hundreds of thousands of victim organizations worldwide with tools that give the attackers total, remote control over affected systems. ![]() State hackers rush to exploit unpatched Microsoft Exchange serversĪt least 30,000 organizations across the United States - including a significant number of small businesses, towns, cities and local governments - have over the past few days been hacked by an unusually aggressive Chinese cyber espionage unit that’s focused on stealing email from victim organizations, multiple sources tell KrebsOnSecurity. You can find more info on how to install the patches in this article published by the Microsoft Exchange Team. Microsoft Senior Threat Intelligence Analyst Kevin Beaumont also created a Nmap script to scan networks for potentially vulnerable Microsoft Exchange servers.īefore updating your Exchange servers, you will need to make sure you’ve deployed a supported Cumulative Update (CU) and Update Rollup (RU) beforehand. To detect if your Exchange server has been already breached, Microsoft provides PowerShell and console commands to scan Event Logs/Exchange Server logs for traces of the attack. Microsoft urges administrators to “ install these updates immediately” to protect vulnerable on-premises Exchange servers from these ongoing attacks. ![]() Multiple state-sponsored hacking groups are actively exploiting critical Exchange bugs Microsoft patched Tuesday via emergency out-of-band security updates. This reply was modified 2 years, 2 months ago by Alex5723. – Microsoft Exchange Server Remote Code Execution Vulnerability The following CVEs have undergone a major revision increment:
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