Microsoft announced this week that Defender Antivirus and System Center Endpoint Protection now provide automatic protection against attacks exploiting the recently disclosed ProxyLogon vulnerabilities in Microsoft Exchange.
“Today, we have taken an additional step to further support our customers who are still vulnerable and have not yet implemented the complete security update. With the latest security intelligence update, Microsoft Defender Antivirus and System Center Endpoint Protection will automatically mitigate CVE-2021-26855 on any vulnerable Exchange Server on which it is deployed.” reads the announcement published by Microsoft.
The IT giant early this month released emergency out-of-band security updates for all supported Microsoft Exchange versions that fix four zero-day flaws, a week later the company released patches for unsupported Microsoft Exchange versions.
Microsoft reported that at least one China linked APT group, tracked as HAFNIUM, chained these vulnerabilities to access on-premises Exchange servers to access email accounts, and install backdoors to maintain access to victim environments.
Microsoft also updated MSERT to detect web shells used in attacks against Microsoft Exchange installs, released IOC Detection Tool for Microsoft Exchange Server flaws, and released an Exchange On-premises Mitigation Tool (EOMT) tool to allow small businesses to quickly address the vulnerabilities exploited in the recent attacks.
Microsoft has now implemented the ProxyLogon protection in Defender Antivirus and System Center Endpoint Protection allowing to protect unpatched systems running its antimalware solution.
“Microsoft Defender Antivirus will automatically identify if a vulnerable version of Exchange Server is installed and apply the mitigations the first time the security intelligence update is deployed. The mitigation is deployed once per machine,” Microsoft added.
If you want to receive the weekly Security Affairs Newsletter for free subscribe here.
Follow me on Twitter: @securityaffairs and Facebook
| [adrotate banner=”9″] | [adrotate banner=”12″] |
(SecurityAffairs – hacking, Microsoft Defender)
[adrotate banner=”5″]
[adrotate banner=”13″]
Nation-state actor UAT4356 has been exploiting two zero-days in ASA and FTD firewalls since November…
A malware campaign has been exploiting the updating mechanism of the eScan antivirus to distribute…
The Treasury Department's Office of Foreign Assets Control (OFAC) sanctioned four Iranian nationals for their…
A cyber attack on Leicester City Council resulted in certain street lights remaining illuminated all…
The National Police Agency in South Korea warns that North Korea-linked threat actors are targeting…
The U.S. Department of State imposed visa restrictions on 13 individuals allegedly linked to the…
This website uses cookies.
