==========================================================================
\nUbuntu Security Notice USN-6254-1
\nJuly 26, 2023<\/p>\n
linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities
\n==========================================================================<\/p>\n
A security issue affects these releases of Ubuntu and its derivatives:<\/p>\n
– Ubuntu 16.04 LTS (Available with Ubuntu Pro)
\n– Ubuntu 14.04 LTS (Available with Ubuntu Pro)<\/p>\n
Summary:<\/p>\n
Several security issues were fixed in the Linux kernel.<\/p>\n
Software Description:
\n– linux: Linux kernel
\n– linux-aws: Linux kernel for Amazon Web Services (AWS) systems
\n– linux-kvm: Linux kernel for cloud environments
\n– linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty<\/p>\n
Details:<\/p>\n
Jordy Zomer and Alexandra Sandulescu discovered that syscalls invoking the
\ndo_prlimit() function in the Linux kernel did not properly handle
\nspeculative execution barriers. A local attacker could use this to expose
\nsensitive information (kernel memory). (CVE-2023-0458)<\/p>\n
It was discovered that a race condition existed in the btrfs file system
\nimplementation in the Linux kernel, leading to a use-after-free
\nvulnerability. A local attacker could use this to cause a denial of service
\n(system crash) or possibly expose sensitive information. (CVE-2023-1611)<\/p>\n
It was discovered that the XFS file system implementation in the Linux
\nkernel did not properly perform metadata validation when mounting certain
\nimages. An attacker could use this to specially craft a file system image
\nthat, when mounted, could cause a denial of service (system crash).
\n(CVE-2023-2124)<\/p>\n
It was discovered that a use-after-free vulnerability existed in the iSCSI
\nTCP implementation in the Linux kernel. A local attacker could possibly use
\nthis to cause a denial of service (system crash). (CVE-2023-2162)<\/p>\n
It was discovered that the ext4 file system implementation in the Linux
\nkernel did not properly handle extra inode size for extended attributes,
\nleading to a use-after-free vulnerability. A privileged attacker could
\npossibly use this to cause a denial of service (system crash) or possibly
\nexecute arbitrary code. (CVE-2023-2513)<\/p>\n
It was discovered that the IP-VLAN network driver for the Linux kernel did
\nnot properly initialize memory in some situations, leading to an out-of-
\nbounds write vulnerability. An attacker could use this to cause a denial of
\nservice (system crash) or possibly execute arbitrary code. (CVE-2023-3090)<\/p>\n
It was discovered that the Ricoh R5C592 MemoryStick card reader driver in
\nthe Linux kernel contained a race condition during module unload, leading
\nto a use-after-free vulnerability. A local attacker could use this to cause
\na denial of service (system crash) or possibly execute arbitrary code.
\n(CVE-2023-3141)<\/p>\n
It was discovered that a use-after-free vulnerability existed in the IEEE
\n1394 (Firewire) implementation in the Linux kernel. A privileged attacker
\ncould use this to cause a denial of service (system crash) or possibly
\nexecute arbitrary code. (CVE-2023-3159)<\/p>\n
Sanan Hasanov discovered that the framebuffer console driver in the Linux
\nkernel did not properly perform checks for font dimension limits. A local
\nattacker could use this to cause a denial of service (system crash).
\n(CVE-2023-3161)<\/p>\n
It was discovered that the kernel->user space relay implementation in the
\nLinux kernel did not properly perform certain buffer calculations, leading
\nto an out-of-bounds read vulnerability. A local attacker could use this to
\ncause a denial of service (system crash) or expose sensitive information
\n(kernel memory). (CVE-2023-3268)<\/p>\n
It was discovered that the netfilter subsystem in the Linux kernel did not
\nproperly handle some error conditions, leading to a use-after-free
\nvulnerability. A local attacker could use this to cause a denial of service
\n(system crash) or possibly execute arbitrary code. (CVE-2023-3390)<\/p>\n
Tanguy Dubroca discovered that the netfilter subsystem in the Linux kernel
\ndid not properly handle certain pointer data type, leading to an out-of-
\nbounds write vulnerability. A privileged attacker could use this to cause a
\ndenial of service (system crash) or possibly execute arbitrary code.
\n(CVE-2023-35001)<\/p>\n
Update instructions:<\/p>\n
The problem can be corrected by updating your system to the following
\npackage versions:<\/p>\n
Ubuntu 16.04 LTS (Available with Ubuntu Pro):
\nlinux-image-4.4.0-1122-kvm 4.4.0-1122.132
\nlinux-image-4.4.0-1159-aws 4.4.0-1159.174
\nlinux-image-4.4.0-243-generic 4.4.0-243.277
\nlinux-image-4.4.0-243-lowlatency 4.4.0-243.277
\nlinux-image-aws 4.4.0.1159.163
\nlinux-image-generic 4.4.0.243.249
\nlinux-image-generic-lts-xenial 4.4.0.243.249
\nlinux-image-kvm 4.4.0.1122.119
\nlinux-image-lowlatency 4.4.0.243.249
\nlinux-image-lowlatency-lts-xenial 4.4.0.243.249
\nlinux-image-virtual 4.4.0.243.249
\nlinux-image-virtual-lts-xenial 4.4.0.243.249<\/p>\n
Ubuntu 14.04 LTS (Available with Ubuntu Pro):
\nlinux-image-4.4.0-1121-aws 4.4.0-1121.127
\nlinux-image-4.4.0-243-generic 4.4.0-243.277~14.04.1
\nlinux-image-4.4.0-243-lowlatency 4.4.0-243.277~14.04.1
\nlinux-image-aws 4.4.0.1121.118
\nlinux-image-generic-lts-xenial 4.4.0.243.211
\nlinux-image-lowlatency-lts-xenial 4.4.0.243.211
\nlinux-image-virtual-lts-xenial 4.4.0.243.211<\/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-6254-1
\nCVE-2023-0458, CVE-2023-1611, CVE-2023-2124, CVE-2023-2162,
\nCVE-2023-2513, CVE-2023-3090, CVE-2023-3141, CVE-2023-3159,
\nCVE-2023-3161, CVE-2023-3268, CVE-2023-3390, CVE-2023-35001<\/p>\n","protected":false},"excerpt":{"rendered":"
========================================================================== Ubuntu Security Notice USN-6254-1 July 26, 2023 linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: – Ubuntu 16.04 LTS (Available with Ubuntu Pro) – Ubuntu 14.04 LTS (Available with Ubuntu Pro) Summary: Several security issues were fixed in the Linux kernel. Software Description: – linux: …<\/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-45689","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/45689","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=45689"}],"version-history":[{"count":2,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/45689\/revisions"}],"predecessor-version":[{"id":45965,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/45689\/revisions\/45965"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=45689"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=45689"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=45689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}