Sigurnosni nedostaci jezgre operacijskog sustava

==========================================================================
Ubuntu Security Notice USN-4525-1
September 21, 2020

linux, linux-azure, linux-gcp, linux-oracle 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-azure: Linux kernel for Microsoft Azure Cloud systems
– linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
– linux-oracle: Linux kernel for Oracle Cloud systems

Details:

It was discovered that the AMD Cryptographic Coprocessor device driver in
the Linux kernel did not properly deallocate memory in some situations. A
local attacker could use this to cause a denial of service (memory
exhaustion). (CVE-2019-18808)

It was discovered that the Conexant 23885 TV card device driver for the
Linux kernel did not properly deallocate memory in some error conditions. A
local attacker could use this to cause a denial of service (memory
exhaustion). (CVE-2019-19054)

It was discovered that the VFIO PCI driver in the Linux kernel did not
properly handle attempts to access disabled memory spaces. A local attacker
could use this to cause a denial of service (system crash).
(CVE-2020-12888)

It was discovered that the state of network RNG in the Linux kernel was
potentially observable. A remote attacker could use this to expose
sensitive information. (CVE-2020-16166)

It was discovered that the NFS client implementation in the Linux kernel
did not properly perform bounds checking before copying security labels in
some situations. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2020-25212)

Update instructions:

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

Ubuntu 20.04 LTS:
linux-image-5.4.0-1025-gcp 5.4.0-1025.25
linux-image-5.4.0-1025-oracle 5.4.0-1025.25
linux-image-5.4.0-1026-azure 5.4.0-1026.26
linux-image-5.4.0-48-generic 5.4.0-48.52
linux-image-5.4.0-48-generic-lpae 5.4.0-48.52
linux-image-5.4.0-48-lowlatency 5.4.0-48.52
linux-image-azure 5.4.0.1026.25
linux-image-gcp 5.4.0.1025.22
linux-image-generic 5.4.0.48.51
linux-image-generic-lpae 5.4.0.48.51
linux-image-gke 5.4.0.1025.22
linux-image-lowlatency 5.4.0.48.51
linux-image-oem 5.4.0.48.51
linux-image-oem-osp1 5.4.0.48.51
linux-image-oracle 5.4.0.1025.22
linux-image-virtual 5.4.0.48.51

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/4525-1
CVE-2019-18808, CVE-2019-19054, CVE-2020-12888, CVE-2020-16166,
CVE-2020-25212

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.4.0-48.52
https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1026.26
https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1025.25
https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1025.25

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==========================================================================
Ubuntu Security Notice USN-4527-1
September 22, 2020

linux, linux-aws, linux-lts-xenial, linux-raspi2, linux-snapdragon
vulnerabilities
==========================================================================

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

– 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-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:

It was discovered that the Atheros HTC based wireless driver in the Linux
kernel did not properly deallocate in certain error conditions. A local
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2019-19073, CVE-2019-19074)

Yue Haibing discovered that the Linux kernel did not properly handle
reference counting in sysfs for network devices in some situations. A local
attacker could possibly use this to cause a denial of service.
(CVE-2019-20811)

It was discovered that the F2FS file system in the Linux kernel did not
properly perform bounds checking in some situations, leading to an out-of-
bounds read. A local attacker could possibly use this to expose sensitive
information (kernel memory). (CVE-2019-9445)

It was discovered that the F2FS file system in the Linux kernel did not
properly validate xattr meta data in some situations, leading to an out-of-
bounds read. An attacker could use this to construct a malicious F2FS image
that, when mounted, could expose sensitive information (kernel memory).
(CVE-2019-9453)

It was discovered that the F2FS file system implementation in the Linux
kernel did not properly perform bounds checking on xattrs in some
situations. A local attacker could possibly use this to expose sensitive
information (kernel memory). (CVE-2020-0067)

Update instructions:

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

Ubuntu 16.04 LTS:
linux-image-4.4.0-1114-aws 4.4.0-1114.127
linux-image-4.4.0-1139-raspi2 4.4.0-1139.148
linux-image-4.4.0-1143-snapdragon 4.4.0-1143.152
linux-image-4.4.0-190-generic 4.4.0-190.220
linux-image-4.4.0-190-generic-lpae 4.4.0-190.220
linux-image-4.4.0-190-lowlatency 4.4.0-190.220
linux-image-4.4.0-190-powerpc-e500mc 4.4.0-190.220
linux-image-4.4.0-190-powerpc-smp 4.4.0-190.220
linux-image-4.4.0-190-powerpc64-emb 4.4.0-190.220
linux-image-4.4.0-190-powerpc64-smp 4.4.0-190.220
linux-image-aws 4.4.0.1114.119
linux-image-generic 4.4.0.190.196
linux-image-generic-lpae 4.4.0.190.196
linux-image-lowlatency 4.4.0.190.196
linux-image-powerpc-e500mc 4.4.0.190.196
linux-image-powerpc-smp 4.4.0.190.196
linux-image-powerpc64-emb 4.4.0.190.196
linux-image-powerpc64-smp 4.4.0.190.196
linux-image-raspi2 4.4.0.1139.139
linux-image-snapdragon 4.4.0.1143.135
linux-image-virtual 4.4.0.190.196

Ubuntu 14.04 ESM:
linux-image-4.4.0-1078-aws 4.4.0-1078.82
linux-image-4.4.0-190-generic 4.4.0-190.220~14.04.1
linux-image-4.4.0-190-generic-lpae 4.4.0-190.220~14.04.1
linux-image-4.4.0-190-lowlatency 4.4.0-190.220~14.04.1
linux-image-4.4.0-190-powerpc-e500mc 4.4.0-190.220~14.04.1
linux-image-4.4.0-190-powerpc-smp 4.4.0-190.220~14.04.1
linux-image-4.4.0-190-powerpc64-emb 4.4.0-190.220~14.04.1
linux-image-4.4.0-190-powerpc64-smp 4.4.0-190.220~14.04.1
linux-image-aws 4.4.0.1078.75
linux-image-generic-lpae-lts-xenial 4.4.0.190.166
linux-image-generic-lts-xenial 4.4.0.190.166
linux-image-lowlatency-lts-xenial 4.4.0.190.166
linux-image-powerpc-e500mc-lts-xenial 4.4.0.190.166
linux-image-powerpc-smp-lts-xenial 4.4.0.190.166
linux-image-powerpc64-emb-lts-xenial 4.4.0.190.166
linux-image-powerpc64-smp-lts-xenial 4.4.0.190.166
linux-image-virtual-lts-xenial 4.4.0.190.166

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

References:
https://usn.ubuntu.com/4527-1
CVE-2019-19054, CVE-2019-19073, CVE-2019-19074, CVE-2019-20811,
CVE-2019-9445, CVE-2019-9453, CVE-2020-0067, CVE-2020-25212

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.4.0-190.220
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1114.127
https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1139.148
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1143.152

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==========================================================================
Ubuntu Security Notice USN-4526-1
September 22, 2020

linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp,
linux-gcp-4.15, linux-gke-4.15, linux-hwe, 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-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
– linux-hwe: Linux hardware enablement (HWE) kernel

Details:

It was discovered that the ADIS16400 IIO IMU Driver for the Linux kernel
did not properly deallocate memory in certain error conditions. A local
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2019-19061)

It was discovered that the AMD Audio Coprocessor driver for the Linux
kernel did not properly deallocate memory in certain error conditions. A
local attacker with the ability to load modules could use this to cause a
denial of service (memory exhaustion). (CVE-2019-19067)

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)

It was discovered that the state of network RNG in the Linux kernel was
potentially observable. A remote attacker could use this to expose
sensitive information. (CVE-2020-16166)

Update instructions:

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

Ubuntu 18.04 LTS:
linux-image-4.15.0-1054-oracle 4.15.0-1054.58
linux-image-4.15.0-1070-gke 4.15.0-1070.73
linux-image-4.15.0-1071-raspi2 4.15.0-1071.75
linux-image-4.15.0-1083-aws 4.15.0-1083.87
linux-image-4.15.0-1084-gcp 4.15.0-1084.95
linux-image-4.15.0-1087-snapdragon 4.15.0-1087.95
linux-image-4.15.0-1096-azure 4.15.0-1096.106
linux-image-4.15.0-1097-oem 4.15.0-1097.107
linux-image-4.15.0-118-generic 4.15.0-118.119
linux-image-4.15.0-118-generic-lpae 4.15.0-118.119
linux-image-4.15.0-118-lowlatency 4.15.0-118.119
linux-image-aws-lts-18.04 4.15.0.1083.85
linux-image-azure-lts-18.04 4.15.0.1096.69
linux-image-gcp-lts-18.04 4.15.0.1084.102
linux-image-generic 4.15.0.118.105
linux-image-generic-lpae 4.15.0.118.105
linux-image-gke 4.15.0.1070.74
linux-image-gke-4.15 4.15.0.1070.74
linux-image-lowlatency 4.15.0.118.105
linux-image-oem 4.15.0.1097.101
linux-image-oracle-lts-18.04 4.15.0.1054.64
linux-image-powerpc-e500mc 4.15.0.118.105
linux-image-powerpc-smp 4.15.0.118.105
linux-image-powerpc64-emb 4.15.0.118.105
linux-image-powerpc64-smp 4.15.0.118.105
linux-image-raspi2 4.15.0.1071.68
linux-image-snapdragon 4.15.0.1087.90
linux-image-virtual 4.15.0.118.105

Ubuntu 16.04 LTS:
linux-image-4.15.0-1054-oracle 4.15.0-1054.58~16.04.1
linux-image-4.15.0-1083-aws 4.15.0-1083.87~16.04.1
linux-image-4.15.0-1084-gcp 4.15.0-1084.95~16.04.1
linux-image-4.15.0-1096-azure 4.15.0-1096.106~16.04.1
linux-image-4.15.0-118-generic 4.15.0-118.119~16.04.1
linux-image-4.15.0-118-generic-lpae 4.15.0-118.119~16.04.1
linux-image-4.15.0-118-lowlatency 4.15.0-118.119~16.04.1
linux-image-aws-hwe 4.15.0.1083.79
linux-image-azure 4.15.0.1096.90
linux-image-azure-edge 4.15.0.1096.90
linux-image-gcp 4.15.0.1084.85
linux-image-generic-hwe-16.04 4.15.0.118.119
linux-image-generic-lpae-hwe-16.04 4.15.0.118.119
linux-image-gke 4.15.0.1084.85
linux-image-lowlatency-hwe-16.04 4.15.0.118.119
linux-image-oem 4.15.0.118.119
linux-image-oracle 4.15.0.1054.44
linux-image-virtual-hwe-16.04 4.15.0.118.119

Ubuntu 14.04 ESM:
linux-image-4.15.0-1096-azure 4.15.0-1096.106~14.04.1
linux-image-azure 4.15.0.1096.72

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

References:
https://usn.ubuntu.com/4526-1
CVE-2019-18808, CVE-2019-19054, CVE-2019-19061, CVE-2019-19067,
CVE-2019-19073, CVE-2019-19074, CVE-2019-9445, CVE-2020-12888,
CVE-2020-14356, CVE-2020-16166

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-118.119
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1083.87
https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1096.106
https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1084.95
https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1070.73
https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1097.107
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1054.58
https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1071.75
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1087.95
https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1083.87~16.04.1
https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1096.106~16.04.1
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1084.95~16.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-118.119~16.04.1
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1054.58~16.04.1

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