USN-3468-3: Linux kernel (GCP) vulnerabilities<\/p>\n
31st October, 2017<\/em><\/p>\n A security issue affects these releases of Ubuntu and its Several security issues were fixed in the Linux kernel.\n<\/p>\n It was discovered that the KVM subsystem in the Linux kernel did not It was discovered that the Flash-Friendly File System (f2fs) implementation Anthony Perard discovered that the Xen virtual block driver did not It was discovered that a use-after-free vulnerability existed in the POSIX Dave Chinner discovered that the XFS filesystem did not enforce that the The problem can be corrected by updating your system to the following To update your system, please follow these instructions: After a standard system update you need to reboot your computer to make ATTENTION: Due to an unavoidable ABI change the kernel updates have CVE-2017-1000252<\/a>, <\/p>\n CVE-2017-10663<\/a>, <\/p>\n CVE-2017-10911<\/a>, <\/p>\n CVE-2017-11176<\/a>, <\/p>\n CVE-2017-14340<\/a><\/p>\n Source: USN-3468-3: Linux kernel (GCP) vulnerabilities<\/a><\/p>\n","protected":false},"excerpt":{"rendered":" USN-3468-3: Linux kernel (GCP) vulnerabilities Ubuntu Security Notice USN-3468-3 31st October, 2017 linux-gcp vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 16.04 LTS Summary Several security issues were fixed in the Linux kernel. Software description linux-gcp – Linux kernel for Google Cloud Platform (GCP) systems Details It was discovered that the KVM subsystem in the Linux kernel did notproperly bound guest IRQs. A local attacker in a guest VM could use this tocause a denial of service (host system crash). (CVE-2017-1000252) It was discovered that the Flash-Friendly File System (f2fs) implementationin the Linux kernel did not properly validate superblock metadata. A localattacker could use this to cause a denial of service (system crash) orpossibly execute arbitrary code. (CVE-2017-10663) Anthony Perard discovered that the Xen virtual block driver did notproperly initialize some data structures before passing [ 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-20093","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\/20093","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=20093"}],"version-history":[{"count":1,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/20093\/revisions"}],"predecessor-version":[{"id":20094,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/20093\/revisions\/20094"}],"wp:attachment":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/media?parent=20093"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/categories?post=20093"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/tags?post=20093"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}linux-gcp vulnerabilities<\/h3>\n
\n derivatives:<\/p>\n\n
Summary<\/h3>\n
Software description<\/h3>\n
\n
\n – Linux kernel for Google Cloud Platform (GCP) systems<\/p>\n<\/li>\n<\/ul>\nDetails<\/h3>\n
properly bound guest IRQs. A local attacker in a guest VM could use this to
cause a denial of service (host system crash). (CVE-2017-1000252<\/a>)<\/p>\n
in the Linux kernel did not properly validate superblock metadata. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2017-10663<\/a>)<\/p>\n
properly initialize some data structures before passing them to user space.
A local attacker in a guest VM could use this to expose sensitive
information from the host OS or other guest VMs. (CVE-2017-10911<\/a>)<\/p>\n
message queue implementation in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-11176<\/a>)<\/p>\n
realtime inode flag was settable only on filesystems on a realtime device.
A local attacker could use this to cause a denial of service (system
crash). (CVE-2017-14340<\/a>)<\/p>\nUpdate instructions<\/h3>\n
\npackage version:<\/p>\n\n
\n
\n 4.10.0.1008.10<\/a>
\n <\/span>\n <\/dd>\n
\n
\n 4.10.0-1008.8<\/a>
\n <\/span>\n <\/dd>\n<\/dl>\n
\nhttps:\/\/wiki.ubuntu.com\/Security\/Upgrades<\/a>.\n<\/p>\n
all the necessary changes.<\/p>\n
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.<\/p>\nReferences<\/h3>\n