USN-3582-2: Linux kernel (Xenial HWE) vulnerabilities<\/p>\n
22nd February, 2018<\/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 USN-3582-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 Mohamed Ghannam discovered that the IPv4 raw socket implementation in the Laurent Guerby discovered that the mbcache feature in the ext2 and ext4 Vitaly Mayatskikh discovered that the SCSI subsystem in the Linux kernel ChunYu Wang discovered that a use-after-free vulnerability existed in the Mohamed Ghannam discovered a use-after-free vulnerability in the DCCP USN-3540-2 mitigated CVE-2017-5715<\/a> (Spectre Variant 2) for the Jann Horn discovered that microprocessors utilizing speculative execution 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-2015-8952<\/a>, <\/p>\n CVE-2017-12190<\/a>, <\/p>\n CVE-2017-15115<\/a>, <\/p>\n CVE-2017-17712<\/a>, <\/p>\n CVE-2017-5715<\/a>, <\/p>\n CVE-2017-8824<\/a><\/p>\n Source: USN-3582-2: Linux kernel (Xenial HWE) vulnerabilities<\/a><\/p>\n","protected":false},"excerpt":{"rendered":" USN-3582-2: Linux kernel (Xenial HWE) vulnerabilities Ubuntu Security Notice USN-3582-2 22nd February, 2018 linux-lts-xenial, linux-aws vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 14.04 LTS Summary Several security issues were fixed in the Linux kernel. Software description linux-aws – Linux kernel for Amazon Web Services (AWS) systems linux-lts-xenial – Linux hardware enablement kernel from Xenial for Trusty Details USN-3582-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04LTS. This update provides the corresponding updates for the LinuxHardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu14.04 LTS. Mohamed Ghannam discovered that the IPv4 raw socket implementation in theLinux kernel contained a race condition leading to uninitialized pointerusage. A local attacker could use this to cause a denial of service orpossibly execute arbitrary code. (CVE-2017-17712) Laurent Guerby discovered that the mbcache feature in the ext2 and [ 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-22490","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\/22490","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=22490"}],"version-history":[{"count":1,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/22490\/revisions"}],"predecessor-version":[{"id":22491,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/posts\/22490\/revisions\/22491"}],"wp:attachment":[{"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/media?parent=22490"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/categories?post=22490"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jirak.net\/wp\/wp-json\/wp\/v2\/tags?post=22490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}linux-lts-xenial, linux-aws vulnerabilities<\/h3>\n
\n derivatives:<\/p>\n\n
Summary<\/h3>\n
Software description<\/h3>\n
\n
\n – Linux kernel for Amazon Web Services (AWS) systems<\/p>\n<\/li>\n
\n – Linux hardware enablement kernel from Xenial for Trusty<\/p>\n<\/li>\n<\/ul>\nDetails<\/h3>\n
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.<\/p>\n
Linux kernel contained a race condition leading to uninitialized pointer
usage. A local attacker could use this to cause a denial of service or
possibly execute arbitrary code. (CVE-2017-17712<\/a>)<\/p>\n
filesystems in the Linux kernel improperly handled xattr block caching. A
local attacker could use this to cause a denial of service. (CVE-2015-8952<\/a>)<\/p>\n
did not properly track reference counts when merging buffers. A local
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2017-12190<\/a>)<\/p>\n
SCTP protocol 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-2017-15115<\/a>)<\/p>\n
protocol 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-2017-8824<\/a>)<\/p>\n
amd64 architecture in Ubuntu 14.04 LTS. This update provides the
compiler-based retpoline kernel mitigation for the amd64 and i386
architectures. Original advisory details:<\/p>\n
and branch prediction may allow unauthorized memory reads via sidechannel
attacks. This flaw is known as Spectre. A local attacker could use this to
expose sensitive information, including kernel memory. (CVE-2017-5715<\/a>)<\/p>\nUpdate instructions<\/h3>\n
\npackage version:<\/p>\n\n
\n
\n 4.4.0-116.140~14.04.1<\/a>
\n <\/span>\n <\/dd>\n
\n
\n 4.4.0-116.140~14.04.1<\/a>
\n <\/span>\n <\/dd>\n
\n
\n 4.4.0-116.140~14.04.1<\/a>
\n <\/span>\n <\/dd>\n
\n
\n 4.4.0-116.140~14.04.1<\/a>
\n <\/span>\n <\/dd>\n
\n
\n 4.4.0-1014.14<\/a>
\n <\/span>\n <\/dd>\n
\n
\n 4.4.0-116.140~14.04.1<\/a>
\n <\/span>\n <\/dd>\n
\n
\n 4.4.0-116.140~14.04.1<\/a>
\n <\/span>\n <\/dd>\n
\n
\n 4.4.0-116.140~14.04.1<\/a>
\n <\/span>\n <\/dd>\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