==========================================================================
\nUbuntu Security Notice USN-5484-1
\nJune 16, 2022<\/p>\n
linux vulnerabilities
\n==========================================================================<\/p>\n
A security issue affects these releases of Ubuntu and its derivatives:<\/p>\n
– Ubuntu 14.04 ESM<\/p>\n
Summary:<\/p>\n
Several security issues were fixed in the Linux kernel.<\/p>\n
Software Description:
\n– linux: Linux kernel<\/p>\n
Details:<\/p>\n
It was discovered that the Linux kernel did not properly restrict access to
\nthe kernel debugger when booted in secure boot environments. A privileged
\nattacker could use this to bypass UEFI Secure Boot restrictions.
\n(CVE-2022-21499)<\/p>\n
It was discovered that a race condition existed in the network scheduling
\nsubsystem of the Linux kernel, leading to a use-after-free vulnerability. A
\nlocal attacker could use this to cause a denial of service (system crash)
\nor possibly execute arbitrary code. (CVE-2021-39713)<\/p>\n
It was discovered that some Intel processors did not completely perform
\ncleanup actions on multi-core shared buffers. A local attacker could
\npossibly use this to expose sensitive information. (CVE-2022-21123)<\/p>\n
It was discovered that some Intel processors did not completely perform
\ncleanup actions on microarchitectural fill buffers. A local attacker could
\npossibly use this to expose sensitive information. (CVE-2022-21125)<\/p>\n
It was discovered that some Intel processors did not properly perform
\ncleanup during specific special register write operations. A local attacker
\ncould possibly use this to expose sensitive information. (CVE-2022-21166)<\/p>\n
Update instructions:<\/p>\n
The problem can be corrected by updating your system to the following
\npackage versions:<\/p>\n
Ubuntu 14.04 ESM:
\nlinux-image-3.13.0-190-generic 3.13.0-190.241
\nlinux-image-3.13.0-190-lowlatency 3.13.0-190.241
\nlinux-image-generic 3.13.0.190.199
\nlinux-image-lowlatency 3.13.0.190.199
\nlinux-image-server 3.13.0.190.199
\nlinux-image-virtual 3.13.0.190.199<\/p>\n
Please note that fully mitigating processor vulnerabilities requires
\ncorresponding processor microcode\/firmware updates.<\/p>\n
After a standard system update you need to reboot your computer to make
\nall the necessary changes.<\/p>\n
ATTENTION: Due to an unavoidable ABI change the kernel updates have
\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>\n
References:
\nhttps:\/\/ubuntu.com\/security\/notices\/USN-5484-1
\nCVE-2021-39713, CVE-2022-21123, CVE-2022-21125, CVE-2022-21166,
\nCVE-2022-21499<\/p>\n","protected":false},"excerpt":{"rendered":"
========================================================================== Ubuntu Security Notice USN-5484-1 June 16, 2022 linux vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: – Ubuntu 14.04 ESM Summary: Several security issues were fixed in the Linux kernel. Software Description: – linux: Linux kernel Details: It was discovered that the Linux kernel did not properly restrict access …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-25980","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/25980","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=25980"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/25980\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=25980"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=25980"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=25980"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}