{"id":35892,"date":"2020-03-17T10:48:54","date_gmt":"2020-03-17T01:48:54","guid":{"rendered":"https:\/\/jirak.net\/wp\/usn-4303-1-linux-kernel-vulnerability\/"},"modified":"2020-03-17T11:34:22","modified_gmt":"2020-03-17T02:34:22","slug":"usn-4303-1-linux-kernel-vulnerability","status":"publish","type":"post","link":"https:\/\/jirak.net\/wp\/usn-4303-1-linux-kernel-vulnerability\/","title":{"rendered":"USN-4303-1: Linux kernel vulnerability"},"content":{"rendered":"<p>USN-4303-1: Linux kernel vulnerability<\/p>\n<h2 id=\"linux-linux-aws-linux-kvm-vulnerability\">linux, linux-aws, linux-kvm vulnerability<\/h2>\n<p>A security issue affects these releases of Ubuntu and its derivatives:<\/p>\n<ul>\n<li>Ubuntu 16.04 LTS<\/li>\n<\/ul>\n<h3 id=\"summary\">Summary<\/h3>\n<p>The system could be made to expose sensitive information.<\/p>\n<h3 id=\"software-description\">Software Description<\/h3>\n<ul>\n<li>linux &#8211; Linux kernel<\/li>\n<li>linux-aws &#8211; Linux kernel for Amazon Web Services (AWS) systems<\/li>\n<li>linux-kvm &#8211; Linux kernel for cloud environments<\/li>\n<\/ul>\n<h3 id=\"details\">Details<\/h3>\n<p>Paulo Bonzini discovered that the KVM hypervisor implementation in the<br \/>\nLinux kernel could improperly let a nested (level 2) guest access the<br \/>\nresources of a parent (level 1) guest in certain situations. An attacker<br \/>\ncould use this to expose sensitive information.<\/p>\n<h2 id=\"update-instructions\">Update instructions<\/h2>\n<p>The problem can be corrected by updating your system to the following package versions:<\/p>\n<dl>\n<dt>Ubuntu 16.04 LTS<\/dt>\n<dd><a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux-kvm\">linux-image-4.4.0-1068-kvm<\/a> &#8211; <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux-kvm\/4.4.0-1068.75\">4.4.0-1068.75<\/a><\/dd>\n<dd><a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux-aws\">linux-image-4.4.0-1104-aws<\/a> &#8211; <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux-aws\/4.4.0-1104.115\">4.4.0-1104.115<\/a><\/dd>\n<dd><a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux\">linux-image-4.4.0-176-generic<\/a> &#8211; <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux\/4.4.0-176.206\">4.4.0-176.206<\/a><\/dd>\n<dd><a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux\">linux-image-4.4.0-176-generic-lpae<\/a> &#8211; <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux\/4.4.0-176.206\">4.4.0-176.206<\/a><\/dd>\n<dd><a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux\">linux-image-4.4.0-176-lowlatency<\/a> &#8211; <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux\/4.4.0-176.206\">4.4.0-176.206<\/a><\/dd>\n<dd><a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux\">linux-image-4.4.0-176-powerpc-e500mc<\/a> &#8211; <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux\/4.4.0-176.206\">4.4.0-176.206<\/a><\/dd>\n<dd><a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux\">linux-image-4.4.0-176-powerpc-smp<\/a> &#8211; <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux\/4.4.0-176.206\">4.4.0-176.206<\/a><\/dd>\n<dd><a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux\">linux-image-4.4.0-176-powerpc64-emb<\/a> &#8211; <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux\/4.4.0-176.206\">4.4.0-176.206<\/a><\/dd>\n<dd><a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux\">linux-image-4.4.0-176-powerpc64-smp<\/a> &#8211; <a href=\"https:\/\/launchpad.net\/ubuntu\/+source\/linux\/4.4.0-176.206\">4.4.0-176.206<\/a><\/dd>\n<dd>linux-image-aws &#8211; 4.4.0.1104.108<\/dd>\n<dd>linux-image-generic &#8211; 4.4.0.176.184<\/dd>\n<dd>linux-image-generic-lpae &#8211; 4.4.0.176.184<\/dd>\n<dd>linux-image-kvm &#8211; 4.4.0.1068.68<\/dd>\n<dd>linux-image-lowlatency &#8211; 4.4.0.176.184<\/dd>\n<dd>linux-image-powerpc-e500mc &#8211; 4.4.0.176.184<\/dd>\n<dd>linux-image-powerpc-smp &#8211; 4.4.0.176.184<\/dd>\n<dd>linux-image-powerpc64-emb &#8211; 4.4.0.176.184<\/dd>\n<dd>linux-image-powerpc64-smp &#8211; 4.4.0.176.184<\/dd>\n<dd>linux-image-virtual &#8211; 4.4.0.176.184<\/dd>\n<\/dl>\n<p>To update your system, please follow these instructions: <a href=\"https:\/\/wiki.ubuntu.com\/Security\/Upgrades\">https:\/\/wiki.ubuntu.com\/Security\/Upgrades<\/a>.<\/p>\n<p>After a standard system update you need to reboot your computer to make<br \/>\nall the necessary changes.<\/p>\n<p>ATTENTION: Due to an unavoidable ABI change the kernel updates have<br \/>\nbeen given a new version number, which requires you to recompile and<br \/>\nreinstall all third party kernel modules you might have installed.<br \/>\nUnless you manually uninstalled the standard kernel metapackages<br \/>\n(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,<br \/>\nlinux-powerpc), a standard system upgrade will automatically perform<br \/>\nthis as well.<\/p>\n<h2 id=\"references\">References<\/h2>\n<ul>\n<li><a href=\"https:\/\/people.canonical.com\/~ubuntu-security\/cve\/CVE-2020-2732\">CVE-2020-2732<\/a><\/li>\n<\/ul>\n<p>Source: <a href=\"https:\/\/usn.ubuntu.com\/4303-1\/\" target=\"_blank\" rel=\"noopener noreferrer\">USN-4303-1: Linux kernel vulnerability<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"mh-excerpt\"><p>USN-4303-1: Linux kernel vulnerability linux, linux-aws, linux-kvm vulnerability A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 16.04 LTS Summary The system could be made to expose sensitive information. Software Description linux &#8211; Linux kernel linux-aws &#8211; Linux kernel for Amazon Web Services (AWS) systems linux-kvm &#8211; Linux kernel for cloud environments Details Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested (level 2) guest access the resources of a parent (level 1) guest in certain situations. An attacker could use this to expose sensitive information. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS linux-image-4.4.0-1068-kvm &#8211; 4.4.0-1068.75 linux-image-4.4.0-1104-aws &#8211; 4.4.0-1104.115 linux-image-4.4.0-176-generic &#8211; 4.4.0-176.206 linux-image-4.4.0-176-generic-lpae &#8211; 4.4.0-176.206 linux-image-4.4.0-176-lowlatency &#8211; 4.4.0-176.206 linux-image-4.4.0-176-powerpc-e500mc &#8211; 4.4.0-176.206 linux-image-4.4.0-176-powerpc-smp &#8211; 4.4.0-176.206 linux-image-4.4.0-176-powerpc64-emb &#8211; 4.4.0-176.206 <a class=\"mh-excerpt-more\" href=\"https:\/\/jirak.net\/wp\/usn-4303-1-linux-kernel-vulnerability\/\" title=\"USN-4303-1: Linux kernel vulnerability\">[ more&#8230; ]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[586],"tags":[587],"class_list":["post-35892","post","type-post","status-publish","format-standard","hentry","category-ubuntu-usn","tag-ubuntu-usn"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/35892","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/comments?post=35892"}],"version-history":[{"count":1,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/35892\/revisions"}],"predecessor-version":[{"id":35893,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/35892\/revisions\/35893"}],"wp:attachment":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/media?parent=35892"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/categories?post=35892"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/tags?post=35892"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}