Sigurnosni nedostaci jezgre operacijskog sustava

==========================================================================
Ubuntu Security Notice USN-4485-1
September 02, 2020

linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp,
linux-gcp-4.15, linux-gke-4.15, linux-kvm, linux-oem, linux-oracle,
linux-raspi2, linux-snapdragon vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS
– Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
– linux: Linux kernel
– linux-aws: Linux kernel for Amazon Web Services (AWS) systems
– linux-azure-4.15: Linux kernel for Microsoft Azure Cloud systems
– linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems
– linux-gke-4.15: Linux kernel for Google Container Engine (GKE) systems
– linux-kvm: Linux kernel for cloud environments
– linux-oem: Linux kernel for OEM systems
– linux-oracle: Linux kernel for Oracle Cloud systems
– linux-raspi2: Linux kernel for Raspberry Pi (V8) systems
– linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors
– linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems
– linux-azure: Linux kernel for Microsoft Azure Cloud systems
– linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

Details:

Timothy Michaud discovered that the i915 graphics driver in the Linux
kernel did not properly validate user memory locations for the
i915_gem_execbuffer2_ioctl. A local attacker could possibly use this to
cause a denial of service or execute arbitrary code. (CVE-2018-20669)

It was discovered that the Kvaser CAN/USB driver in the Linux kernel did
not properly initialize memory in certain situations. A local attacker
could possibly use this to expose sensitive information (kernel memory).
(CVE-2019-19947)

Chuhong Yuan discovered that go7007 USB audio device driver in the Linux
kernel did not properly deallocate memory in some failure conditions. A
physically proximate attacker could use this to cause a denial of service
(memory exhaustion). (CVE-2019-20810)

It was discovered that the elf handling code in the Linux kernel did not
initialize memory before using it in certain situations. A local attacker
could use this to possibly expose sensitive information (kernel memory).
(CVE-2020-10732)

It was discovered that the Linux kernel did not correctly apply Speculative
Store Bypass Disable (SSBD) mitigations in certain situations. A local
attacker could possibly use this to expose sensitive information.
(CVE-2020-10766)

It was discovered that the Linux kernel did not correctly apply Indirect
Branch Predictor Barrier (IBPB) mitigations in certain situations. A local
attacker could possibly use this to expose sensitive information.
(CVE-2020-10767)

It was discovered that the Linux kernel could incorrectly enable Indirect
Branch Speculation after it has been disabled for a process via a prctl()
call. A local attacker could possibly use this to expose sensitive
information. (CVE-2020-10768)

Luca Bruno discovered that the zram module in the Linux kernel did not
properly restrict unprivileged users from accessing the hot_add sysfs file.
A local attacker could use this to cause a denial of service (memory
exhaustion). (CVE-2020-10781)

It was discovered that the XFS file system implementation in the Linux
kernel did not properly validate meta data in some circumstances. An
attacker could use this to construct a malicious XFS image that, when
mounted, could cause a denial of service. (CVE-2020-12655)

It was discovered that the bcache subsystem in the Linux kernel did not
properly release a lock in some error conditions. A local attacker could
possibly use this to cause a denial of service. (CVE-2020-12771)

It was discovered that the Virtual Terminal keyboard driver in the Linux
kernel contained an integer overflow. A local attacker could possibly use
this to have an unspecified impact. (CVE-2020-13974)

Kyungtae Kim discovered that the USB testing driver in the Linux kernel did
not properly deallocate memory on disconnect events. A physically proximate
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2020-15393)

It was discovered that the NFS server implementation in the Linux kernel
did not properly honor umask settings when setting permissions while
creating file system objects if the underlying file system did not support
ACLs. An attacker could possibly use this to expose sensitive information
or violate system integrity. (CVE-2020-24394)

It was discovered that the Kerberos SUNRPC GSS implementation in the Linux
kernel did not properly deallocate memory on module unload. A local
privileged attacker could possibly use this to cause a denial of service
(memory exhaustion). (CVE-2020-12656)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS:
linux-image-4.15.0-1051-oracle 4.15.0-1051.55
linux-image-4.15.0-1067-gke 4.15.0-1067.70
linux-image-4.15.0-1068-raspi2 4.15.0-1068.72
linux-image-4.15.0-1072-kvm 4.15.0-1072.73
linux-image-4.15.0-1080-aws 4.15.0-1080.84
linux-image-4.15.0-1081-gcp 4.15.0-1081.92
linux-image-4.15.0-1084-snapdragon 4.15.0-1084.92
linux-image-4.15.0-1093-azure 4.15.0-1093.103
linux-image-4.15.0-1094-oem 4.15.0-1094.104
linux-image-4.15.0-115-generic 4.15.0-115.116
linux-image-4.15.0-115-generic-lpae 4.15.0-115.116
linux-image-4.15.0-115-lowlatency 4.15.0-115.116
linux-image-aws-lts-18.04 4.15.0.1080.82
linux-image-azure-lts-18.04 4.15.0.1093.67
linux-image-gcp-lts-18.04 4.15.0.1081.99
linux-image-generic 4.15.0.115.103
linux-image-generic-lpae 4.15.0.115.103
linux-image-gke 4.15.0.1067.71
linux-image-gke-4.15 4.15.0.1067.71
linux-image-kvm 4.15.0.1072.68
linux-image-lowlatency 4.15.0.115.103
linux-image-oem 4.15.0.1094.98
linux-image-oracle-lts-18.04 4.15.0.1051.62
linux-image-powerpc-e500mc 4.15.0.115.103
linux-image-powerpc-smp 4.15.0.115.103
linux-image-powerpc64-emb 4.15.0.115.103
linux-image-powerpc64-smp 4.15.0.115.103
linux-image-raspi2 4.15.0.1068.66
linux-image-snapdragon 4.15.0.1084.87
linux-image-virtual 4.15.0.115.103

Ubuntu 16.04 LTS:
linux-image-4.15.0-1051-oracle 4.15.0-1051.55~16.04.1
linux-image-4.15.0-1080-aws 4.15.0-1080.84~16.04.1
linux-image-4.15.0-1081-gcp 4.15.0-1081.92~16.04.1
linux-image-4.15.0-1093-azure 4.15.0-1093.103~16.04.1
linux-image-aws-hwe 4.15.0.1080.77
linux-image-azure 4.15.0.1093.88
linux-image-azure-edge 4.15.0.1093.88
linux-image-gcp 4.15.0.1081.83
linux-image-gke 4.15.0.1081.83
linux-image-oracle 4.15.0.1051.42

Ubuntu 14.04 ESM:
linux-image-4.15.0-1093-azure 4.15.0-1093.103~14.04.1
linux-image-azure 4.15.0.1093.70

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.

References:
https://usn.ubuntu.com/4485-1
CVE-2018-20669, CVE-2019-19947, CVE-2019-20810, CVE-2020-10732,
CVE-2020-10766, CVE-2020-10767, CVE-2020-10768, CVE-2020-10781,
CVE-2020-12655, CVE-2020-12656, CVE-2020-12771, CVE-2020-13974,
CVE-2020-15393, CVE-2020-24394

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-115.116
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1080.84
https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1093.103
https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1081.92
https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1067.70
https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1072.73
https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1094.104
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1051.55
https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1068.72
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1084.92
https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1080.84~16.04.1
https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1093.103~16.04.1
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1081.92~16.04.1
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1051.55~16.04.1

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==========================================================================
Ubuntu Security Notice USN-4483-1
September 02, 2020

linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp,
linux-gcp-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi,
linux-raspi-5.4 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 20.04 LTS
– Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
– linux: Linux kernel
– linux-aws: Linux kernel for Amazon Web Services (AWS) systems
– linux-azure: Linux kernel for Microsoft Azure Cloud systems
– linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
– linux-kvm: Linux kernel for cloud environments
– linux-oracle: Linux kernel for Oracle Cloud systems
– linux-raspi: Linux kernel for Raspberry Pi (V8) systems
– linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems
– linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems
– linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems
– linux-oracle-5.4: Linux kernel for Oracle Cloud systems
– linux-raspi-5.4: Linux kernel for Raspberry Pi (V8) systems

Details:

Fan Yang discovered that the mremap implementation in the Linux kernel did
not properly handle DAX Huge Pages. A local attacker with access to DAX
storage could use this to gain administrative privileges. (CVE-2020-10757)

It was discovered that the Virtual Terminal keyboard driver in the Linux
kernel contained an integer overflow. A local attacker could possibly use
this to have an unspecified impact. (CVE-2020-13974)

It was discovered that the cgroup v2 subsystem in the Linux kernel did not
properly perform reference counting in some situations, leading to a NULL
pointer dereference. A local attacker could use this to cause a denial of
service or possibly gain administrative privileges. (CVE-2020-14356)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
linux-image-5.4.0-1016-raspi 5.4.0-1016.17
linux-image-5.4.0-1022-aws 5.4.0-1022.22
linux-image-5.4.0-1022-gcp 5.4.0-1022.22
linux-image-5.4.0-1022-oracle 5.4.0-1022.22
linux-image-5.4.0-1023-azure 5.4.0-1023.23
linux-image-5.4.0-45-generic 5.4.0-45.49
linux-image-5.4.0-45-generic-lpae 5.4.0-45.49
linux-image-5.4.0-45-lowlatency 5.4.0-45.49
linux-image-aws 5.4.0.1022.23
linux-image-azure 5.4.0.1023.22
linux-image-gcp 5.4.0.1022.20
linux-image-generic 5.4.0.45.49
linux-image-generic-lpae 5.4.0.45.49
linux-image-gke 5.4.0.1022.20
linux-image-kvm 5.4.0.1021.20
linux-image-lowlatency 5.4.0.45.49
linux-image-oem 5.4.0.45.49
linux-image-oem-osp1 5.4.0.45.49
linux-image-oracle 5.4.0.1022.20
linux-image-raspi 5.4.0.1016.51
linux-image-raspi2 5.4.0.1016.51
linux-image-virtual 5.4.0.45.49

Ubuntu 18.04 LTS:
linux-image-5.4.0-1016-raspi 5.4.0-1016.17~18.04.1
linux-image-5.4.0-1022-aws 5.4.0-1022.22~18.04.1
linux-image-5.4.0-1022-gcp 5.4.0-1022.22~18.04.1
linux-image-5.4.0-1022-oracle 5.4.0-1022.22~18.04.1
linux-image-5.4.0-1023-azure 5.4.0-1023.23~18.04.1
linux-image-aws-edge 5.4.0.1022.8
linux-image-azure 5.4.0.1023.7
linux-image-gcp 5.4.0.1022.9
linux-image-gke-5.4 5.4.0.1022.9
linux-image-oracle 5.4.0.1022.7
linux-image-raspi-hwe-18.04 5.4.0.1016.20

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
https://usn.ubuntu.com/4483-1
CVE-2019-20810, CVE-2020-10757, CVE-2020-10766, CVE-2020-10767,
CVE-2020-10768, CVE-2020-10781, CVE-2020-12655, CVE-2020-12656,
CVE-2020-12771, CVE-2020-13974, CVE-2020-14356, CVE-2020-15393,
CVE-2020-24394

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.4.0-45.49
https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1022.22
https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1023.23
https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1022.22
https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1021.21
https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1022.22
https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1016.17
https://launchpad.net/ubuntu/+source/linux-aws-5.4/5.4.0-1022.22~18.04.1
https://launchpad.net/ubuntu/+source/linux-azure-5.4/5.4.0-1023.23~18.04.1
https://launchpad.net/ubuntu/+source/linux-gcp-5.4/5.4.0-1022.22~18.04.1
https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1022.22~18.04.1
https://launchpad.net/ubuntu/+source/linux-raspi-5.4/5.4.0-1016.17~18.04.1

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==========================================================================
Ubuntu Security Notice USN-4484-1
September 02, 2020

linux-hwe, linux-aws-5.3, linux-gke-5.3, linux-raspi2-5.3 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 18.04 LTS

Summary:

The system could be made to crash or run programs as an administrator.

Software Description:
– linux-aws-5.3: Linux kernel for Amazon Web Services (AWS) systems
– linux-gke-5.3: Linux kernel for Google Container Engine (GKE) systems
– linux-hwe: Linux hardware enablement (HWE) kernel
– linux-raspi2-5.3: Linux kernel for Raspberry Pi (V8) systems

Details:

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS:
linux-image-5.3.0-1032-raspi2 5.3.0-1032.34
linux-image-5.3.0-1034-aws 5.3.0-1034.36
linux-image-5.3.0-1034-gke 5.3.0-1034.36
linux-image-5.3.0-66-generic 5.3.0-66.60
linux-image-5.3.0-66-lowlatency 5.3.0-66.60
linux-image-aws 5.3.0.1034.33
linux-image-gke-5.3 5.3.0.1034.19
linux-image-gkeop-5.3 5.3.0.66.123
linux-image-raspi2-hwe-18.04 5.3.0.1032.22

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
https://usn.ubuntu.com/4484-1
CVE-2020-14356

Package Information:
https://launchpad.net/ubuntu/+source/linux-aws-5.3/5.3.0-1034.36
https://launchpad.net/ubuntu/+source/linux-gke-5.3/5.3.0-1034.36
https://launchpad.net/ubuntu/+source/linux-hwe/5.3.0-66.60
https://launchpad.net/ubuntu/+source/linux-raspi2-5.3/5.3.0-1032.34

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==========================================================================
Ubuntu Security Notice USN-4486-1
September 02, 2020

linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2,
linux-snapdragon vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 16.04 LTS
– Ubuntu 14.04 ESM

Summary:

The Linux kernel could be made to crash if it mounted a malicious XFS
file system.

Software Description:
– 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 (V8) systems
– linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors
– linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

Wen Xu discovered that the XFS filesystem implementation in the Linux
kernel did not properly validate meta-data information. An attacker could
use this to construct a malicious xfs image that, when mounted, could cause
a denial of service (system crash).

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
linux-image-4.4.0-1079-kvm 4.4.0-1079.86
linux-image-4.4.0-1113-aws 4.4.0-1113.126
linux-image-4.4.0-1138-raspi2 4.4.0-1138.147
linux-image-4.4.0-1142-snapdragon 4.4.0-1142.151
linux-image-4.4.0-189-generic 4.4.0-189.219
linux-image-4.4.0-189-generic-lpae 4.4.0-189.219
linux-image-4.4.0-189-lowlatency 4.4.0-189.219
linux-image-4.4.0-189-powerpc-e500mc 4.4.0-189.219
linux-image-4.4.0-189-powerpc-smp 4.4.0-189.219
linux-image-4.4.0-189-powerpc64-emb 4.4.0-189.219
linux-image-4.4.0-189-powerpc64-smp 4.4.0-189.219
linux-image-aws 4.4.0.1113.118
linux-image-generic 4.4.0.189.195
linux-image-generic-lpae 4.4.0.189.195
linux-image-kvm 4.4.0.1079.77
linux-image-lowlatency 4.4.0.189.195
linux-image-powerpc-e500mc 4.4.0.189.195
linux-image-powerpc-smp 4.4.0.189.195
linux-image-powerpc64-emb 4.4.0.189.195
linux-image-powerpc64-smp 4.4.0.189.195
linux-image-raspi2 4.4.0.1138.138
linux-image-snapdragon 4.4.0.1142.134
linux-image-virtual 4.4.0.189.195

Ubuntu 14.04 ESM:
linux-image-4.4.0-1077-aws 4.4.0-1077.81
linux-image-4.4.0-189-generic 4.4.0-189.219~14.04.1
linux-image-4.4.0-189-generic-lpae 4.4.0-189.219~14.04.1
linux-image-4.4.0-189-lowlatency 4.4.0-189.219~14.04.1
linux-image-4.4.0-189-powerpc-e500mc 4.4.0-189.219~14.04.1
linux-image-4.4.0-189-powerpc-smp 4.4.0-189.219~14.04.1
linux-image-4.4.0-189-powerpc64-emb 4.4.0-189.219~14.04.1
linux-image-4.4.0-189-powerpc64-smp 4.4.0-189.219~14.04.1
linux-image-aws 4.4.0.1077.74
linux-image-generic-lpae-lts-xenial 4.4.0.189.165
linux-image-generic-lts-xenial 4.4.0.189.165
linux-image-lowlatency-lts-xenial 4.4.0.189.165
linux-image-powerpc-e500mc-lts-xenial 4.4.0.189.165
linux-image-powerpc-smp-lts-xenial 4.4.0.189.165
linux-image-powerpc64-emb-lts-xenial 4.4.0.189.165
linux-image-powerpc64-smp-lts-xenial 4.4.0.189.165
linux-image-virtual-lts-xenial 4.4.0.189.165

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
https://usn.ubuntu.com/4486-1
CVE-2018-10323

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.4.0-189.219
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1113.126
https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1079.86
https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1138.147
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1142.151

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