{"id":41240,"date":"2021-06-07T13:35:18","date_gmt":"2021-06-07T13:35:18","guid":{"rendered":"https:\/\/packetstormsecurity.com\/news\/view\/32352\/Patch-Now-Attackers-Are-Hunting-For-This-Critical-VMware-vCenter-Flaw.html"},"modified":"2021-06-07T13:35:18","modified_gmt":"2021-06-07T13:35:18","slug":"patch-now-attackers-are-hunting-for-this-critical-vmware-vcenter-flaw","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/patch-now-attackers-are-hunting-for-this-critical-vmware-vcenter-flaw\/","title":{"rendered":"Patch Now: Attackers Are Hunting For This Critical VMware vCenter Flaw"},"content":{"rendered":"<div><img decoding=\"async\" src=\"https:\/\/www.zdnet.com\/a\/hub\/i\/r\/2020\/03\/19\/862a52d9-91bf-4488-9353-2e11aaaeb164\/thumbnail\/770x578\/e4455286d5b214577fecc2e2cc7ef793\/cybersecurityistock-1132228216valerybrozhinsky1.jpg\" class=\"ff-og-image-inserted\"><\/div>\n<p>The US Cybersecurity and Infrastructure Security Agency has warned companies running VMware vCenter Server and VMware Cloud Foundation software to update as soon as possible because attackers are scanning the internet for vulnerable servers.&nbsp; <\/p>\n<p>VMware released a patch for two critical remote code execution flaws on May 25. The two bugs, tracked as CVE-2021-21985 and CVE-2021-21986, have a severity rating of 9.8 out of 10. The bugs affect VMware vCenter Server (vCenter Server) and VMware Cloud Foundation (Cloud Foundation). &nbsp; <\/p>\n<p>CISA&nbsp;<a href=\"https:\/\/us-cert.cisa.gov\/ncas\/current-activity\/2021\/06\/04\/unpatched-vmware-vcenter-software\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">has now warned that<\/a>&nbsp;it is &#8220;aware of the likelihood that cyber-threat actors are attempting to exploit CVE-2021-21985&#8221;. It said organisations should apply the necessary updates as soon as possible, even if out-of-cycle work is required. <\/p>\n<p><strong>SEE: <\/strong><a href=\"https:\/\/www.techrepublic.com\/resource-library\/whitepapers\/network-security-policy\/?ftag=CMG-01-10aaa1b\" target=\"_blank\" rel=\"noopener noreferrer\" data-component=\"externalLink\"><strong>Network security policy<\/strong><\/a><strong> (TechRepublic Premium)<\/strong><\/p>\n<p><a href=\"https:\/\/www.zdnet.com\/article\/patch-immediately-vmware-warns-of-critical-remote-code-execution-holes-in-vcenter\/\">As ZDNet reported last month<\/a>, CVE-2021-21985 affects the vSphere HTML5 client and allows an attacker with network access to port 443 to exploit it to execute commands freely on the underlying operating system that hosts vCenter Server and take control of it.&nbsp; &nbsp; <\/p>\n<p>&#8220;Although patches were made on May 25, 2021, unpatched systems remain an attractive target and attackers can exploit this vulnerability to take control of an unpatched system,&#8221; CISA warned.&nbsp; <\/p>\n<p><a href=\"https:\/\/arstechnica.com\/gadgets\/2021\/06\/under-exploit-vmware-vulnerability-with-severity-rating-of-9-8-out-of-10\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">Via Ars Technica<\/a>, Troy Mursch, a security researcher for Bad Packets, has been tracking mass scanning for the bugs on internet-exposed VMware vCenter servers.&nbsp; <\/p>\n<section class=\"sharethrough-top\" data-component=\"medusaContentRecommendation\" data-medusa-content-recommendation-options=\"{&quot;promo&quot;:&quot;promo_zd_recommendation_sharethrough_top_in_article_desktop&quot;,&quot;spot&quot;:&quot;dfp-in-article&quot;}\"> <\/section>\n<p>On Saturday, Mursch reported he had seen exploit activity using a proof-of-concept exploit targeting VMware vCenter servers harboring CVE-2021-21985. Bad Packets runs a honeypot that contains servers with the bug.&nbsp; <\/p>\n<figure class=\"media-source\">\n<div class=\"twitterContainer\" readability=\"6.7792207792208\">\n<blockquote class=\"twitter-tweet\" readability=\"7.6266233766234\">\n<p lang=\"en\" dir=\"ltr\">CVE-2021-21985 exploit activity detected from 119.28.15.199 (\ud83c\udded\ud83c\uddf0) based on this PoC (<a href=\"https:\/\/t.co\/qhBbHdOaK4\" rel=\"noopener noreferrer nofollow\" target=\"_blank\" data-component=\"externalLink\">https:\/\/t.co\/qhBbHdOaK4<\/a>) targeting our VMware vCenter honeypot.<\/p>\n<p>Query our API for &#8220;source_ip_address=119.28.15.199&#8221; for full payload and other relevant indicators. <a href=\"https:\/\/twitter.com\/hashtag\/threatintel?src=hash&amp;ref_src=twsrc%5Etfw\" rel=\"noopener noreferrer\" target=\"_blank\" data-component=\"externalLink\">#threatintel<\/a><\/p>\n<p>\u2014 Bad Packets (@bad_packets) <a href=\"https:\/\/twitter.com\/bad_packets\/status\/1401260420455747584?ref_src=twsrc%5Etfw\" rel=\"noopener noreferrer\" target=\"_blank\" data-component=\"externalLink\">June 5, 2021<\/a><\/p><\/blockquote><\/div>\n<\/figure>\n<p>VMware urged customers to patch affected servers immediately. The virtualization software firm warned organisations that have placed their vCenter Servers on networks that are exposed to the internet and thus may not have firewall protection \u2013 often the last line of defence \u2013 that they should, therefore, audit these systems for compromise. <\/p>\n<p>&#8220;In this era of ransomware it is safest to assume that an attacker is already inside the network somewhere, on a desktop and perhaps even in control of a user account, which is why we strongly recommend declaring an emergency change and patching as soon as possible,&#8221;&nbsp;<a href=\"https:\/\/blogs.vmware.com\/vsphere\/2021\/05\/vmsa-2021-0010.html\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">it previously said<\/a>. <\/p>\n<p>CISA recommended administrators review VMware&#8217;s <a href=\"https:\/\/www.vmware.com\/security\/advisories\/VMSA-2021-0010.html\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">VMSA-2021-010 advisory<\/a>, <a href=\"https:\/\/blogs.vmware.com\/vsphere\/2021\/05\/vmsa-2021-0010.html\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">its blogpost<\/a>, and its <a href=\"https:\/\/core.vmware.com\/resource\/vmsa-2021-0010-faq\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">FAQ<\/a> about the issue.&nbsp; <\/p>\n<p> READ MORE <a href=\"https:\/\/packetstormsecurity.com\/news\/view\/32352\/Patch-Now-Attackers-Are-Hunting-For-This-Critical-VMware-vCenter-Flaw.html\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>READ MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":41241,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[277],"tags":[256],"class_list":["post-41240","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity-blogs","tag-headlinehackerflaw"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Patch Now: Attackers Are Hunting For This Critical VMware vCenter Flaw 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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