{"id":3375,"date":"2020-03-15T08:24:35","date_gmt":"2020-03-15T08:24:35","guid":{"rendered":"https:\/\/visualitynq.com\/?p=3375"},"modified":"2023-02-14T10:58:31","modified_gmt":"2023-02-14T09:58:31","slug":"cve-2020-0796-microsoft-smb-vulnerability","status":"publish","type":"post","link":"https:\/\/visualitynq.com\/de\/resources\/articles\/cve-2020-0796-microsoft-smb-vulnerability\/","title":{"rendered":"CVE-2020-0796 \u2013 Microsoft SMB Vulnerability"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"3375\" class=\"elementor elementor-3375\">\n\t\t\t\t\t\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-46baed5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"46baed5\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-0732a6a\" data-id=\"0732a6a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-975aa21 elementor-widget elementor-widget-heading\" data-id=\"975aa21\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.6.7 - 03-07-2022 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h2 class=\"elementor-heading-title elementor-size-default\">The Recently Revealed SMBv3 Vulnerability: Facts and highlights\n<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f71bbef elementor-widget elementor-widget-text-editor\" data-id=\"f71bbef\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.6.7 - 03-07-2022 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#818a91;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#818a91;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p>The tech community was taken by a surprise this week when a vulnerability in the extremely secure SMB3.1.1 was accidentally revealed in a Microsoft patch update. The remote code execution vulnerability (CVE-2020-0796) currently does not have an official patch, but workarounds are available.<br \/>The SMBv3 vulnerability assumes importance in the light of the recent malware attacks such as WannaCry<\/p><p>NotPetya, which utilized flaws in the older and flawed SMB1 protocol.<br \/>The SMBv3 protocol suite is the latest and most secure server message block protocol used for accessing and sharing files, printers and resources over networks. As of today, no malicious code or a hacking attempt has been reported that exploits the newly discovered flaw.<br \/>This Tuesday (the \u2018Patch Tuesday\u2019 for Windows), Microsoft rolled out its usual fixes and patches for newly found vulnerabilities in the Windows systems. However, there was one patch that was missing. In the meanwhile, Cisco Talos and Fortinet published a vulnerability named \u2018CVE-2020-0796\u2019 that was without a patch. This information was quickly removed, but did not go unnoticed. Later in the day, Microsoft published its advisory.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c447a38 elementor-widget elementor-widget-template\" data-id=\"c447a38\" data-element_type=\"widget\" data-widget_type=\"template.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-template\">\n\t\t\t\t\t<div data-elementor-type=\"section\" data-elementor-id=\"2864\" class=\"elementor elementor-2864\">\n\t\t\t\t\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-d4283cb elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"d4283cb\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-921efa7\" data-id=\"921efa7\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b9c3274 elementor-widget elementor-widget-heading\" data-id=\"b9c3274\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"elementor-heading-title elementor-size-default\">Learn if Visuality Systems SMB solutions can work for you<\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-inner-section elementor-element elementor-element-d017e22 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"d017e22\" 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transform=\"translate(153.394 2755.257)\" fill=\"#fe541d\"><\/path><\/g><\/svg>\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div class=\"elementor-cta__title elementor-cta__content-item elementor-content-item\">Robust SMB3 Server Implementation<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8a89da3 elementor-widget elementor-widget-heading\" data-id=\"8a89da3\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Who is affected\n<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-94b5eda elementor-widget elementor-widget-text-editor\" data-id=\"94b5eda\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>ARM64, Windows 32 and 64-bit editions, Windows 10 (1903 and 1909), and Windows Server (versions 1903 and 1909).<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-57477e0 elementor-widget elementor-widget-heading\" data-id=\"57477e0\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What\u2019s the issue<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9b092f7 elementor-widget elementor-widget-text-editor\" data-id=\"9b092f7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The flaw reportedly allows hackers to launch a \u2018worm\u2019 attack on clients and servers by using a malicious, compressed data packet. The SMB vulnerability can let an unauthorized attacker to run any code as part of an application.<br \/>According to the Microsoft advisory, \u201cTo exploit the vulnerability against an SMB Server, an unauthenticated attacker could send a specially crafted packet to a targeted SMBv3 Server. To exploit the vulnerability against an SMB Client, an unauthenticated attacker would need to configure a malicious SMBv3 Server and convince a user to connect to it.\u201d<br \/>This attack is also \u2018wormable\u2019, that is, the attacker can exploit one system, which, in turn, goes on to infect another.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-23f94a2 elementor-widget elementor-widget-heading\" data-id=\"23f94a2\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What should be done?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6f71a35 elementor-widget elementor-widget-text-editor\" data-id=\"6f71a35\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>While Microsoft is yet to issue a patch, there are a couple of workaround solutions to protect Windows systems.<br \/>1. One is to disable compression using a PowerShell command:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-49382de elementor-widget elementor-widget-text-editor\" data-id=\"49382de\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\u201cSet-ItemProperty -Path \u201cHKLM:\\SYSTEM\\CurrentControlSet\\Services\\LanmanServer\\Parameters\u201d DisableCompression -Type DWORD -Value 1 \u2013Force \u201c\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8bdd1b5 elementor-widget elementor-widget-text-editor\" data-id=\"8bdd1b5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>2. Block the TCP Port 445 so as to stop the malicious code on the periphery firewall.<br \/>The SMBv1 protocol has now been discontinued and replaced in new Windows systems by the advanced dialects of SMBv3.<br \/>Meanwhile, everyone is awaiting patches from Microsoft. According to all forecasts, the company will release them quite soon.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9c07852 elementor-widget elementor-widget-heading\" data-id=\"9c07852\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"elementor-heading-title elementor-size-default\">Visuality Systems confirms that the SMBv3.x related products are not affected by the Microsoft Windows CVE-2020-0796 vulnerability.<\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-493a18d elementor-widget elementor-widget-template\" data-id=\"493a18d\" data-element_type=\"widget\" data-widget_type=\"template.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-template\">\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Microsoft hat k\u00fcrzlich eine Meldung zum Schutz vor einer neuen Sicherheitsl\u00fccke CVE-2020-0796 ver\u00f6ffentlicht<\/p>\n","protected":false},"author":3,"featured_media":4609,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-3375","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - 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