{"id":39712,"date":"2021-02-24T14:31:00","date_gmt":"2021-02-24T14:31:00","guid":{"rendered":"https:\/\/packetstormsecurity.com\/news\/view\/32053\/VMware-Warns-Of-Critical-Remote-Code-Execution-Flaw.html"},"modified":"2021-02-24T14:31:00","modified_gmt":"2021-02-24T14:31:00","slug":"vmware-warns-of-critical-remote-code-execution-flaw","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/vmware-warns-of-critical-remote-code-execution-flaw\/","title":{"rendered":"VMware Warns Of Critical Remote Code Execution Flaw"},"content":{"rendered":"<p>VMware has revealed a critical-rated bug in the HTML5 client for its flagship vSphere hybrid cloud suite.<\/p>\n<p>&#8220;The vSphere Client (HTML5) contains a remote code execution vulnerability in a vCenter Server plugin,&#8221; says VMware&#8217;s <a target=\"_blank\" href=\"https:\/\/www.vmware.com\/security\/advisories\/VMSA-2021-0002.html\" rel=\"noopener noreferrer\">notification<\/a>. &#8220;A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server.&#8221;<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"condor\" data-xsm=\",button,mpu,\" data-sm=\",button,mpu,\" data-md=\",button,banner_plus,mpu\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2YDaNUKiDKujxuvWx3yu-MQAAAFM&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" target=\"_blank\" rel=\"noopener noreferrer\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2YDaNUKiDKujxuvWx3yu-MQAAAFM&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>As vCenter Server is the tool that drives a fleet of virtual servers, this CVSS 9.8-rated bug (CVE-2021-21972) is nasty.<\/p>\n<p>A fix, detailed <a target=\"_blank\" href=\"https:\/\/kb.vmware.com\/s\/article\/82374\" rel=\"noopener noreferrer\">here<\/a>, is needed for vSphere versions prior to 7.0 U1c, 6.7 U3l, and 6.5 U3n. As those releases are all at least a few weeks old, users may already have addressed the issue. Users of Cloud Foundation 3.x and 4.x also need to get patching, pronto.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"mid\" data-raptor=\"eagle\" data-xsm=\",button,mpu_plusplus,\" data-sm=\",button,mpu_plusplus,\" data-md=\",button,mpu_plusplus,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33YDaNUKiDKujxuvWx3yu-MQAAAFM&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener noreferrer\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33YDaNUKiDKujxuvWx3yu-MQAAAFM&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>While you&#8217;re patching that nasty, you may as well also knock off a second HTML client bug (CVE-2021-21973) that VMware says could allow &#8220;a malicious actor with network access to port 443&#8221; to &#8220;exploit this issue by sending a POST request to vCenter Server plugin leading to information disclosure.&#8221;<\/p>\n<p>The same versions of vSphere and Cloud Foundation mentioned above need fixing, with details and downloads to do so <a target=\"_blank\" href=\"https:\/\/kb.vmware.com\/s\/article\/82374\" rel=\"noopener noreferrer\">here<\/a>.<\/p>\n<p>Your work&#8217;s not done once that&#8217;s sorted because VMware has also fixed up an 8.8-rated flaw (CVE-2021-21974) in its ESXi hypervisor, where &#8220;a malicious actor residing within the same network segment as ESXi who has access to port 427 may be able to trigger the heap-overflow issue in OpenSLP service resulting in remote code execution.&#8221;<\/p>\n<div class=\"promo_article\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/regmedia.co.uk\/2018\/05\/10\/skeleton_using_cobwebbed_computer_shutterstock.jpg?x=174&amp;y=115&amp;crop=1\" width=\"174\" height=\"115\" alt=\"Skeleton at computer\"><\/p>\n<h2 title=\"Imminent demise of IE 11 and Angular JS means upgrades are incoming\">Dying software forces changes to VMware\u2019s vSphere Clients<\/h2>\n<p><a href=\"https:\/\/www.theregister.com\/2020\/09\/21\/vmware_client_upgrades\/\"><span>READ MORE<\/span><\/a><\/div>\n<p>OpenSLP is an open-source version of the IETF Service Location Protocol. Details of how to fix that little mess can be found <a target=\"_blank\" href=\"https:\/\/kb.vmware.com\/s\/article\/76372\" rel=\"noopener noreferrer\">here<\/a> and demand your attention if you run vSphere 6.5 and up, or Cloud Foundation 3 or higher. VMware&#8217;s recent <a target=\"_blank\" href=\"https:\/\/www.theregister.com\/2021\/02\/11\/new_vsphere_7_security_guidance\/\" rel=\"noopener noreferrer\">update<\/a> to its guidance on vSphere security recommended disabling OpenSLP if it&#8217;s not in use. But that guidance only emerged two weeks ago.<\/p>\n<p>VMware has tipped its hat to Mikhail Klyuchnikov of Positive Technologies for the vSphere client bugs and Lucas Leong of Trend Micro&#8217;s Zero Day Initiative for the OpenSLP bug.<\/p>\n<p>VMware&#8217;s HTML5 client replaced a Flash-based tool because Virtzilla knew that Adobe&#8217;s buggy mess was <a target=\"_blank\" href=\"https:\/\/www.theregister.com\/2021\/01\/12\/flash_is_dead\/\" rel=\"noopener noreferrer\">on death row<\/a>. The HTML5 client oozed out over years, only achieving feature parity more than two years after initial release.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xsm=\",button,dbutton,mpu_plus,dmpu,\" data-sm=\",button,dbutton,mpu_plus,dmpu,\" data-md=\",button,dbutton,mpu_plus,dmpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44YDaNUKiDKujxuvWx3yu-MQAAAFM&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener noreferrer\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44YDaNUKiDKujxuvWx3yu-MQAAAFM&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>Today&#8217;s bugs won&#8217;t leave vAdmins pining for the good old days of Flash, but with a new UI for ESXi in the works, they&#8217;ll need to remain vigilant. \u00ae<\/p>\n<p> READ MORE <a href=\"https:\/\/packetstormsecurity.com\/news\/view\/32053\/VMware-Warns-Of-Critical-Remote-Code-Execution-Flaw.html\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>READ MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[60],"tags":[968],"class_list":["post-39712","post","type-post","status-publish","format-standard","hentry","category-packet-storm","tag-headlineflaw"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>VMware Warns Of Critical Remote Code Execution Flaw 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