USN-3833-1: Linux kernel (AWS) vulnerabilities<\/p>\n
A security issue affects these releases of Ubuntu and its derivatives:<\/p>\n
Several security issues were fixed in the Linux kernel.<\/p>\n
Jann Horn discovered that the Linux kernel mishandles mapping UID or GID
\nranges inside nested user namespaces in some situations. A local attacker
\ncould use this to bypass access controls on resources outside the
\nnamespace. (CVE-2018-18955)<\/p>\n
Philipp Wendler discovered that the overlayfs implementation in the Linux
\nkernel did not properly verify the directory contents permissions from
\nwithin a unprivileged user namespace. A local attacker could use this to
\nexpose sensitive information (protected file names). (CVE-2018-6559)<\/p>\n
The problem can be corrected by updating your system to the following package versions:<\/p>\n
To update your system, please follow these instructions: https:\/\/wiki.ubuntu.com\/Security\/Upgrades<\/a>.<\/p>\n After a standard system update you need to reboot your computer to make ATTENTION: Due to an unavoidable ABI change the kernel updates have Source: USN-3833-1: Linux kernel (AWS) vulnerabilities<\/a><\/p>\n","protected":false},"excerpt":{"rendered":" USN-3833-1: Linux kernel (AWS) vulnerabilities linux-aws vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 18.04 LTS Summary Several security issues were fixed in the Linux kernel. Software Description linux-aws – Linux kernel for Amazon Web Services (AWS) systems Details Jann Horn discovered that the Linux kernel mishandles mapping UID or GID ranges inside nested user namespaces in some situations. A local attacker could use this to bypass access controls on resources outside the namespace. (CVE-2018-18955) Philipp Wendler discovered that the overlayfs implementation in the Linux kernel did not properly verify the directory contents permissions from within a unprivileged user namespace. A local attacker could use this to expose sensitive information (protected file names). (CVE-2018-6559) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS linux-image-4.15.0-1029-aws – [ more… ]<\/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-27879","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\/27879","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=27879"}],"version-history":[{"count":1,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/27879\/revisions"}],"predecessor-version":[{"id":27880,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/27879\/revisions\/27880"}],"wp:attachment":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/media?parent=27879"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/categories?post=27879"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/tags?post=27879"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nall the necessary changes.<\/p>\n
\nbeen given a new version number, which requires you to recompile and
\nreinstall all third party kernel modules you might have installed.
\nUnless you manually uninstalled the standard kernel metapackages
\n(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
\nlinux-powerpc), a standard system upgrade will automatically perform
\nthis as well.<\/p>\nReferences<\/h2>\n
\n