Sigurnosni nedostaci jezgre operacijskog sustava

==========================================================================
Ubuntu Security Notice USN-4414-1
July 03, 2020

linux, linux-aws, linux-aws-hwe, linux-gcp, linux-gcp-4.15,
linux-gke-4.15, linux-hwe, 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

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-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 (V7) systems
– linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors
– linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems
– linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
– linux-hwe: Linux hardware enablement (HWE) kernel

Details:

It was discovered that the network block device (nbd) implementation in the
Linux kernel did not properly check for error conditions in some
situations. An attacker could possibly use this to cause a denial of service
(system crash). (CVE-2019-16089)

It was discovered that the btrfs file system implementation in the Linux
kernel did not properly validate file system metadata in some situations.
An attacker could use this to construct a malicious btrfs image that, when
mounted, could cause a denial of service (system crash). (CVE-2019-19036,
CVE-2019-19318, CVE-2019-19813, CVE-2019-19816)

It was discovered that the btrfs implementation in the Linux kernel did not
properly detect that a block was marked dirty in some situations. An
attacker could use this to specially craft a file system image that, when
unmounted, could cause a denial of service (system crash). (CVE-2019-19377)

It was discovered that the kernel->user space relay implementation in the
Linux kernel did not properly check return values in some situations. A
local attacker could possibly use this to cause a denial of service (system
crash). (CVE-2019-19462)

Matthew Sheets discovered that the SELinux network label handling
implementation in the Linux kernel could be coerced into de-referencing a
NULL pointer. A remote attacker could use this to cause a denial of service
(system crash). (CVE-2020-10711)

It was discovered that the SCSI generic (sg) driver in the Linux kernel did
not properly handle certain error conditions correctly. A local privileged
attacker could use this to cause a denial of service (system crash).
(CVE-2020-12770)

It was discovered that the USB Gadget device driver in the Linux kernel did
not validate arguments passed from configfs in some situations. A local
attacker could possibly use this to cause a denial of service (system
crash) or possibly expose sensitive information. (CVE-2020-13143)

It was discovered that the efi subsystem in the Linux kernel did not handle
memory allocation failures during early boot in some situations. A local
attacker could possibly use this to cause a denial of service (system
crash). (CVE-2019-12380)

It was discovered that the btrfs file system in the Linux kernel in some
error conditions could report register information to the dmesg buffer. A
local attacker could possibly use this to expose sensitive information.
(CVE-2019-19039)

Update instructions:

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

Ubuntu 18.04 LTS:
linux-image-4.15.0-1048-oracle 4.15.0-1048.52
linux-image-4.15.0-1064-gke 4.15.0-1064.67
linux-image-4.15.0-1065-raspi2 4.15.0-1065.69
linux-image-4.15.0-1069-kvm 4.15.0-1069.70
linux-image-4.15.0-1077-aws 4.15.0-1077.81
linux-image-4.15.0-1078-gcp 4.15.0-1078.88
linux-image-4.15.0-1081-snapdragon 4.15.0-1081.88
linux-image-4.15.0-109-generic 4.15.0-109.110
linux-image-4.15.0-109-generic-lpae 4.15.0-109.110
linux-image-4.15.0-109-lowlatency 4.15.0-109.110
linux-image-4.15.0-1091-oem 4.15.0-1091.101
linux-image-aws-lts-18.04 4.15.0.1077.79
linux-image-gcp-lts-18.04 4.15.0.1078.94
linux-image-generic 4.15.0.109.97
linux-image-generic-lpae 4.15.0.109.97
linux-image-gke 4.15.0.1064.66
linux-image-gke-4.15 4.15.0.1064.66
linux-image-kvm 4.15.0.1069.65
linux-image-lowlatency 4.15.0.109.97
linux-image-oem 4.15.0.1091.94
linux-image-oracle-lts-18.04 4.15.0.1048.57
linux-image-powerpc-e500mc 4.15.0.109.97
linux-image-powerpc-smp 4.15.0.109.97
linux-image-powerpc64-emb 4.15.0.109.97
linux-image-powerpc64-smp 4.15.0.109.97
linux-image-raspi2 4.15.0.1065.63
linux-image-snapdragon 4.15.0.1081.84
linux-image-virtual 4.15.0.109.97

Ubuntu 16.04 LTS:
linux-image-4.15.0-1046-oracle 4.15.0-1046.50~16.04.1
linux-image-4.15.0-107-generic 4.15.0-107.108~16.04.1
linux-image-4.15.0-107-generic-lpae 4.15.0-107.108~16.04.1
linux-image-4.15.0-107-lowlatency 4.15.0-107.108~16.04.1
linux-image-4.15.0-1074-aws 4.15.0-1074.78~16.04.1
linux-image-4.15.0-1078-gcp 4.15.0-1078.88~16.04.1
linux-image-aws-hwe 4.15.0.1074.74
linux-image-gcp 4.15.0.1078.80
linux-image-generic-hwe-16.04 4.15.0.107.112
linux-image-generic-lpae-hwe-16.04 4.15.0.107.112
linux-image-gke 4.15.0.1078.80
linux-image-lowlatency-hwe-16.04 4.15.0.107.112
linux-image-oem 4.15.0.107.112
linux-image-oracle 4.15.0.1046.39
linux-image-virtual-hwe-16.04 4.15.0.107.112

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/4414-1
CVE-2019-12380, CVE-2019-16089, CVE-2019-19036, CVE-2019-19039,
CVE-2019-19318, CVE-2019-19377, CVE-2019-19462, CVE-2019-19813,
CVE-2019-19816, CVE-2020-10711, CVE-2020-12770, CVE-2020-13143

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-109.110
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1077.81
https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1078.88
https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1064.67
https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1069.70
https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1091.101
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1048.52
https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1065.69
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1081.88
https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1074.78~16.04.1
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1078.88~16.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-107.108~16.04.1
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1046.50~16.04.1

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==========================================================================
Ubuntu Security Notice USN-4412-1
July 02, 2020

linux, linux-azure, linux-gcp, linux-gcp-5.3, linux-hwe, linux-kvm,
linux-oracle, linux-oracle-5.3 vulnerabilities
==========================================================================

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

– Ubuntu 19.10
– Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
– linux: Linux kernel
– 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-gcp-5.3: Linux kernel for Google Cloud Platform (GCP) systems
– linux-hwe: Linux hardware enablement (HWE) kernel
– linux-oracle-5.3: Linux kernel for Oracle Cloud systems

Details:

Dmitry Vyukov discovered that the SELinux netlink security hook in the
Linux kernel did not validate messages in some situations. A privileged
attacker could use this to bypass SELinux netlink restrictions.
(CVE-2020-10751)

It was discovered that the KVM implementation in the Linux kernel did not
properly deallocate memory on initialization for some processors. A local
attacker could possibly use this to cause a denial of service.
(CVE-2020-12768)

Update instructions:

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

Ubuntu 19.10:
linux-image-5.3.0-1024-kvm 5.3.0-1024.26
linux-image-5.3.0-1028-oracle 5.3.0-1028.30
linux-image-5.3.0-1030-gcp 5.3.0-1030.32
linux-image-5.3.0-1031-azure 5.3.0-1031.32
linux-image-5.3.0-62-generic 5.3.0-62.56
linux-image-5.3.0-62-generic-lpae 5.3.0-62.56
linux-image-5.3.0-62-lowlatency 5.3.0-62.56
linux-image-5.3.0-62-snapdragon 5.3.0-62.56
linux-image-azure 5.3.0.1031.49
linux-image-gcp 5.3.0.1030.40
linux-image-generic 5.3.0.62.52
linux-image-generic-lpae 5.3.0.62.52
linux-image-gke 5.3.0.1030.40
linux-image-kvm 5.3.0.1024.22
linux-image-lowlatency 5.3.0.62.52
linux-image-oracle 5.3.0.1028.43
linux-image-snapdragon 5.3.0.62.52
linux-image-virtual 5.3.0.62.52

Ubuntu 18.04 LTS:
linux-image-5.3.0-1028-oracle 5.3.0-1028.30~18.04.1
linux-image-5.3.0-1030-gcp 5.3.0-1030.32~18.04.1
linux-image-5.3.0-62-generic 5.3.0-62.56~18.04.1
linux-image-5.3.0-62-generic-lpae 5.3.0-62.56~18.04.1
linux-image-5.3.0-62-lowlatency 5.3.0-62.56~18.04.1
linux-image-gcp 5.3.0.1030.24
linux-image-generic-hwe-18.04 5.3.0.62.115
linux-image-generic-lpae-hwe-18.04 5.3.0.62.115
linux-image-gkeop-5.3 5.3.0.62.115
linux-image-lowlatency-hwe-18.04 5.3.0.62.115
linux-image-oracle 5.3.0.1028.25
linux-image-snapdragon-hwe-18.04 5.3.0.62.115
linux-image-virtual-hwe-18.04 5.3.0.62.115

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

References:
https://usn.ubuntu.com/4412-1
CVE-2020-10711, CVE-2020-10751, CVE-2020-12768, CVE-2020-12770,
CVE-2020-13143

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.3.0-62.56
https://launchpad.net/ubuntu/+source/linux-azure/5.3.0-1031.32
https://launchpad.net/ubuntu/+source/linux-gcp/5.3.0-1030.32
https://launchpad.net/ubuntu/+source/linux-kvm/5.3.0-1024.26
https://launchpad.net/ubuntu/+source/linux-oracle/5.3.0-1028.30
https://launchpad.net/ubuntu/+source/linux-gcp-5.3/5.3.0-1030.32~18.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/5.3.0-62.56~18.04.1
https://launchpad.net/ubuntu/+source/linux-oracle-5.3/5.3.0-1028.30~18.04.1

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==========================================================================
Ubuntu Security Notice USN-4411-1
July 02, 2020

linux, linux-aws, linux-gcp, linux-kvm, linux-oracle, linux-riscv
vulnerabilities
==========================================================================

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

– Ubuntu 20.04 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-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-riscv: Linux kernel for RISC-V systems

Details:

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)

Update instructions:

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

Ubuntu 20.04 LTS:
linux-image-5.4.0-1018-aws 5.4.0-1018.18
linux-image-5.4.0-1019-gcp 5.4.0-1019.19
linux-image-5.4.0-1019-oracle 5.4.0-1019.19
linux-image-5.4.0-28-generic 5.4.0-28.32
linux-image-5.4.0-40-generic 5.4.0-40.44
linux-image-5.4.0-40-generic-lpae 5.4.0-40.44
linux-image-5.4.0-40-lowlatency 5.4.0-40.44
linux-image-aws 5.4.0.1018.19
linux-image-gcp 5.4.0.1019.17
linux-image-generic 5.4.0.28.35
linux-image-generic-lpae 5.4.0.40.43
linux-image-gke 5.4.0.1019.17
linux-image-kvm 5.4.0.1018.17
linux-image-lowlatency 5.4.0.40.43
linux-image-oem 5.4.0.40.43
linux-image-oem-osp1 5.4.0.40.43
linux-image-oracle 5.4.0.1019.17
linux-image-virtual 5.4.0.28.35

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

References:
https://usn.ubuntu.com/4411-1
CVE-2020-10711, CVE-2020-10732, CVE-2020-12768, CVE-2020-12770,
CVE-2020-13143

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.4.0-40.44
https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1018.18
https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1019.19
https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1018.18
https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1019.19
https://launchpad.net/ubuntu/+source/linux-riscv/5.4.0-28.32

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==========================================================================
Ubuntu Security Notice USN-4413-1
July 02, 2020

linux-gke-5.0, linux-oem-osp1 vulnerabilities
==========================================================================

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

– Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
– linux-gke-5.0: Linux kernel for Google Container Engine (GKE) systems
– linux-oem-osp1: Linux kernel for OEM systems

Details:

Update instructions:

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

Ubuntu 18.04 LTS:
linux-image-5.0.0-1043-gke 5.0.0-1043.44
linux-image-5.0.0-1063-oem-osp1 5.0.0-1063.68
linux-image-gke-5.0 5.0.0.1043.28
linux-image-oem-osp1 5.0.0.1063.61

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

References:
https://usn.ubuntu.com/4413-1
CVE-2020-10711, CVE-2020-10751, CVE-2020-12768, CVE-2020-12770,
CVE-2020-13143

Package Information:
https://launchpad.net/ubuntu/+source/linux-gke-5.0/5.0.0-1043.44
https://launchpad.net/ubuntu/+source/linux-oem-osp1/5.0.0-1063.68

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