USN-3582-1: Linux kernel vulnerabilities
22 February 2018
Several security issues were fixed in the Linux kernel.
Releases
Packages
- linux - Linux kernel
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
- linux-kvm - Linux kernel for cloud environments
- linux-raspi2 - Linux kernel for Raspberry Pi 2
- linux-snapdragon - Linux kernel for Snapdragon processors
Details
Mohamed Ghannam discovered that the IPv4 raw socket implementation in the
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)
Laurent Guerby discovered that the mbcache feature in the ext2 and ext4
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)
Vitaly Mayatskikh discovered that the SCSI subsystem in the Linux kernel
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)
ChunYu Wang discovered that a use-after-free vulnerability existed in the
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)
Mohamed Ghannam discovered a use-after-free vulnerability in the DCCP
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)
USN-3540-1 mitigated CVE-2017-5715 (Spectre Variant 2) for the
amd64 architecture in Ubuntu 16.04 LTS. This update provides the
compiler-based retpoline kernel mitigation for the amd64 and i386
architectures. Original advisory details:
Jann Horn discovered that microprocessors utilizing speculative execution
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)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04
-
linux-image-powerpc-e500mc
-
4.4.0.116.122
-
linux-image-4.4.0-116-powerpc64-smp
-
4.4.0-116.140
-
linux-image-4.4.0-1052-aws
-
4.4.0-1052.61
-
linux-image-4.4.0-116-lowlatency
-
4.4.0-116.140
-
linux-image-4.4.0-1019-kvm
-
4.4.0-1019.24
-
linux-image-snapdragon
-
4.4.0.1087.79
-
linux-image-powerpc64-emb
-
4.4.0.116.122
-
linux-image-generic
-
4.4.0.116.122
-
linux-image-4.4.0-116-generic
-
4.4.0-116.140
-
linux-image-4.4.0-116-generic-lpae
-
4.4.0-116.140
-
linux-image-4.4.0-116-powerpc-e500mc
-
4.4.0-116.140
-
linux-image-4.4.0-1085-raspi2
-
4.4.0-1085.93
-
linux-image-aws
-
4.4.0.1052.54
-
linux-image-kvm
-
4.4.0.1019.18
-
linux-image-4.4.0-116-powerpc-smp
-
4.4.0-116.140
-
linux-image-raspi2
-
4.4.0.1085.85
-
linux-image-powerpc-smp
-
4.4.0.116.122
-
linux-image-4.4.0-116-powerpc64-emb
-
4.4.0-116.140
-
linux-image-generic-lpae
-
4.4.0.116.122
-
linux-image-powerpc64-smp
-
4.4.0.116.122
-
linux-image-4.4.0-1087-snapdragon
-
4.4.0-1087.92
-
linux-image-lowlatency
-
4.4.0.116.122
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
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.
Related notices
- USN-3581-3: linux-image-4.13.0-1014-raspi2, linux-image-raspi2, linux-raspi2
- USN-3516-1: firefox
- USN-3531-3: intel-microcode
- USN-3690-1: amd64-microcode
- USN-3540-2: linux-image-4.4.0-111-powerpc-e500mc, linux-image-4.4.0-111-powerpc-smp, linux-image-powerpc64-emb-lts-xenial, linux-image-4.4.0-111-powerpc64-smp, linux-lts-xenial, linux-image-4.4.0-111-generic, linux-image-4.4.0-111-lowlatency, linux-image-aws, linux-image-powerpc64-smp-lts-xenial, linux-aws, linux-image-4.4.0-111-powerpc64-emb, linux-image-generic-lts-xenial, linux-image-powerpc-e500mc-lts-xenial, linux-image-powerpc-smp-lts-xenial, linux-image-4.4.0-1011-aws, linux-image-lowlatency-lts-xenial
- USN-3583-1: linux-image-powerpc-e500mc, linux-image-3.13.0-142-generic-lpae, linux-image-3.13.0-142-powerpc-e500, linux-image-powerpc64-smp, linux-image-3.13.0-142-lowlatency, linux-image-powerpc64-emb, linux-image-powerpc-e500, linux-image-generic-lpae, linux-image-generic, linux-image-3.13.0-142-powerpc-smp, linux-image-3.13.0-142-powerpc64-emb, linux-image-powerpc-smp, linux, linux-image-3.13.0-142-generic, linux-image-3.13.0-142-powerpc64-smp, linux-image-lowlatency, linux-image-3.13.0-142-powerpc-e500mc
- USN-3597-2: linux-image-generic-lpae-hwe-16.04, linux-hwe, linux-image-lowlatency-hwe-16.04, linux-image-4.13.0-37-lowlatency, linux-image-4.13.0-37-generic, linux-image-generic-hwe-16.04, linux-image-4.13.0-37-generic-lpae
- USN-3531-1: intel-microcode
- USN-3777-3: linux-image-azure, linux-image-4.15.0-1025-azure, linux-azure
- USN-3540-1: linux-image-4.4.0-112-lowlatency, linux-aws, linux-image-powerpc64-smp, linux-image-lowlatency, linux-image-4.4.0-112-powerpc-smp, linux-image-4.4.0-112-powerpc64-emb, linux-image-aws, linux-image-powerpc-smp, linux-image-powerpc64-emb, linux-euclid, linux-image-4.4.0-112-powerpc64-smp, linux-image-4.4.0-1049-aws, linux-image-euclid, linux-image-4.4.0-112-generic, linux-image-4.4.0-112-powerpc-e500mc, linux-image-powerpc-e500mc, linux-image-4.4.0-9023-euclid, linux-image-generic-lpae, linux-image-4.4.0-112-generic-lpae, linux-image-generic, linux
- USN-3594-1: linux-image-3.13.0-143-generic, linux-image-generic-lpae, linux-image-generic, linux-image-3.13.0-143-lowlatency, linux, linux-image-3.13.0-143-generic-lpae, linux-image-lowlatency
- USN-3581-1: linux-image-generic-lpae, linux-image-generic, linux-image-4.13.0-36-lowlatency, linux-image-4.13.0-36-generic, linux, linux-image-4.13.0-36-generic-lpae, linux-image-lowlatency
- USN-3581-2: linux-image-4.13.0-1011-azure, linux-image-generic-lpae-hwe-16.04, linux-image-4.13.0-1011-gcp, linux-hwe, linux-image-oem, linux-image-lowlatency-hwe-16.04, linux-image-4.13.0-36-lowlatency, linux-gcp, linux-image-gcp, linux-image-gke, linux-oem, linux-image-4.13.0-36-generic, linux-image-4.13.0-1021-oem, linux-image-azure, linux-image-4.13.0-36-generic-lpae, linux-image-generic-hwe-16.04, linux-azure
- USN-3542-2: linux-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-140-generic
- USN-3582-2: linux-image-lowlatency-lts-xenial, linux-image-4.4.0-116-lowlatency, linux-image-4.4.0-1014-aws, linux-image-powerpc64-emb-lts-xenial, linux-image-4.4.0-116-powerpc-smp, linux-image-4.4.0-116-generic-lpae, linux-image-4.4.0-116-generic, linux-image-4.4.0-116-powerpc-e500mc, linux-image-4.4.0-116-powerpc64-smp, linux-image-aws, linux-image-powerpc64-smp-lts-xenial, linux-lts-xenial, linux-image-powerpc-e500mc-lts-xenial, linux-image-generic-lpae-lts-xenial, linux-image-generic-lts-xenial, linux-image-powerpc-smp-lts-xenial, linux-aws, linux-image-4.4.0-116-powerpc64-emb
- USN-3487-1: linux-image-4.13.0-17-lowlatency, linux-image-generic-lpae, linux-image-raspi2, linux-image-generic, linux-image-4.13.0-17-generic-lpae, linux-image-4.13.0-17-generic, linux, linux-image-4.13.0-1006-raspi2, linux-raspi2, linux-image-lowlatency
- USN-3560-1: qemu-system-x86, qemu-system-s390x, qemu, qemu-system
- USN-3541-1: linux-image-4.13.0-31-generic, linux-image-4.13.0-31-lowlatency, linux-image-generic, linux, linux-image-lowlatency
- USN-3597-1: linux-image-generic-lpae, linux-image-raspi2, linux-image-generic, linux-image-4.13.0-37-lowlatency, linux-image-4.13.0-37-generic, linux, linux-raspi2, linux-image-4.13.0-37-generic-lpae, linux-image-4.13.0-1015-raspi2, linux-image-lowlatency
- USN-3583-2: linux-image-3.13.0-142-generic-lpae, linux-image-generic-lpae-lts-trusty, linux-lts-trusty, linux-image-3.13.0-142-generic, linux-image-generic-lts-trusty
- USN-3542-1: linux-image-3.13.0-141-generic, linux-image-generic, linux-image-3.13.0-141-lowlatency, linux, linux-image-lowlatency
- USN-3580-1: linux-image-3.2.0-133-generic-pae, linux-image-generic, linux, linux-image-3.2.0-133-generic, linux-image-generic-pae
- USN-3541-2: linux-hwe, linux-image-4.13.0-31-generic, linux-image-4.13.0-31-lowlatency, linux-image-lowlatency-hwe-16.04, linux-image-4.13.0-1017-oem, linux-image-oem, linux-gcp, linux-image-4.13.0-1006-azure, linux-image-gcp, linux-oem, linux-image-4.13.0-1007-gcp, linux-image-azure, linux-image-gke, linux-image-generic-hwe-16.04, linux-azure
- USN-3561-1: libvirt, libvirt-bin, libvirt0
- USN-3549-1: linux-image-4.4.0-1017-kvm, linux-kvm, linux-image-kvm
- USN-3530-1: libwebkit2gtk-4.0-37, libjavascriptcoregtk-4.0-18, webkit2gtk
- USN-3620-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-144-generic-lpae, linux-image-3.13.0-144-generic, linux-lts-trusty, linux-image-generic-lts-trusty