All posts by The Linux Administrator

USN-3509-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3509-1

7th December, 2017

linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities

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

  • 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-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 a use-after-free vulnerability existed in
the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on-
write of transparent huge pages. A local attacker could use this to cause a
denial of service (application crashes) or possibly gain administrative
privileges. (CVE-2017-1000405)

Fan Wu, Haoran Qiu, and Shixiong Zhao discovered that the associative array
implementation in the Linux kernel sometimes did not properly handle adding
a new entry. A local attacker could use this to cause a denial of service
(system crash). (CVE-2017-12193)

Andrey Konovalov discovered an out-of-bounds read in the GTCO digitizer USB
driver for the Linux kernel. A physically proximate attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2017-16643)

Update instructions

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

Ubuntu 16.04 LTS:
linux-image-powerpc-e500mc 4.4.0.103.108
linux-image-4.4.0-103-powerpc64-smp

4.4.0-103.126
linux-image-4.4.0-103-generic

4.4.0-103.126
linux-image-4.4.0-103-powerpc-e500mc

4.4.0-103.126
linux-image-4.4.0-1012-kvm

4.4.0-1012.17
linux-image-4.4.0-103-generic-lpae

4.4.0-103.126
linux-image-4.4.0-103-powerpc64-emb

4.4.0-103.126
linux-image-generic 4.4.0.103.108
linux-image-snapdragon 4.4.0.1081.73
linux-image-powerpc64-emb 4.4.0.103.108
linux-image-4.4.0-103-powerpc-smp

4.4.0-103.126
linux-image-4.4.0-1079-raspi2

4.4.0-1079.87
linux-image-aws 4.4.0.1043.45
linux-image-kvm 4.4.0.1012.12
linux-image-4.4.0-103-lowlatency

4.4.0-103.126
linux-image-raspi2 4.4.0.1079.79
linux-image-powerpc-smp 4.4.0.103.108
linux-image-generic-lpae 4.4.0.103.108
linux-image-4.4.0-1043-aws

4.4.0-1043.52
linux-image-powerpc64-smp 4.4.0.103.108
linux-image-4.4.0-1081-snapdragon

4.4.0-1081.86
linux-image-lowlatency 4.4.0.103.108

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-1000405,

CVE-2017-12193,

CVE-2017-16643,

CVE-2017-16939

Read More

USN-3508-2: Linux kernel (HWE) vulnerabilities

Ubuntu Security Notice USN-3508-2

7th December, 2017

linux-hwe vulnerabilities

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

  • Ubuntu 16.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

  • linux-hwe
    – Linux hardware enablement (HWE) kernel

Details

USN-3508-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.04.
This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 17.04 for Ubuntu
16.04 LTS.

Mohamed Ghannam discovered that a use-after-free vulnerability existed in
the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on-
write of transparent huge pages. A local attacker could use this to cause a
denial of service (application crashes) or possibly gain administrative
privileges. (CVE-2017-1000405)

Yonggang Guo discovered that a race condition existed in the driver
subsystem in the Linux kernel. A local attacker could use this to possibly
gain administrative privileges. (CVE-2017-12146)

Update instructions

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

Ubuntu 16.04 LTS:
linux-image-4.10.0-42-generic-lpae

4.10.0-42.46~16.04.1
linux-image-4.10.0-42-generic

4.10.0-42.46~16.04.1
linux-image-generic-hwe-16.04

4.10.0.42.44
linux-image-lowlatency-hwe-16.04

4.10.0.42.44
linux-image-4.10.0-42-lowlatency

4.10.0-42.46~16.04.1
linux-image-generic-lpae-hwe-16.04

4.10.0.42.44

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-1000405,

CVE-2017-12146,

CVE-2017-16939

Read More

USN-3508-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3508-1

7th December, 2017

linux, linux-raspi2 vulnerabilities

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

  • Ubuntu 17.04

Summary

Several security issues were fixed in the Linux kernel.

Software description

  • linux
    – Linux kernel

  • linux-raspi2
    – Linux kernel for Raspberry Pi 2

Details

Mohamed Ghannam discovered that a use-after-free vulnerability existed in
the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on-
write of transparent huge pages. A local attacker could use this to cause a
denial of service (application crashes) or possibly gain administrative
privileges. (CVE-2017-1000405)

Yonggang Guo discovered that a race condition existed in the driver
subsystem in the Linux kernel. A local attacker could use this to possibly
gain administrative privileges. (CVE-2017-12146)

Update instructions

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

Ubuntu 17.04:
linux-image-4.10.0-42-generic-lpae

4.10.0-42.46
linux-image-generic-lpae 4.10.0.42.42
linux-image-4.10.0-42-generic

4.10.0-42.46
linux-image-4.10.0-1023-raspi2

4.10.0-1023.26
linux-image-generic 4.10.0.42.42
linux-image-4.10.0-42-lowlatency

4.10.0-42.46
linux-image-lowlatency 4.10.0.42.42
linux-image-raspi2 4.10.0.1023.24

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-1000405,

CVE-2017-12146,

CVE-2017-16939

Read More

USN-3507-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3507-1

7th December, 2017

linux, linux-raspi2 vulnerabilities

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

  • Ubuntu 17.10

Summary

Several security issues were fixed in the Linux kernel.

Software description

  • linux
    – Linux kernel

  • linux-raspi2
    – Linux kernel for Raspberry Pi 2

Details

Mohamed Ghannam discovered that a use-after-free vulnerability existed in
the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on-
write of transparent huge pages. A local attacker could use this to cause a
denial of service (application crashes) or possibly gain administrative
privileges. (CVE-2017-1000405)

Fan Wu, Haoran Qiu, and Shixiong Zhao discovered that the associative array
implementation in the Linux kernel sometimes did not properly handle adding
a new entry. A local attacker could use this to cause a denial of service
(system crash). (CVE-2017-12193)

Eric Biggers discovered that the key management subsystem in the Linux
kernel did not properly restrict adding a key that already exists but is
uninstantiated. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2017-15299)

It was discovered that a null pointer dereference error existed in the
PowerPC KVM implementation in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash). (CVE-2017-15306)

Eric Biggers discovered a race condition in the key management subsystem of
the Linux kernel around keys in a negative state. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-15951)

Andrey Konovalov discovered that the USB subsystem in the Linux kernel did
not properly validate USB BOS metadata. A physically proximate attacker
could use this to cause a denial of service (system crash).
(CVE-2017-16535)

Andrey Konovalov discovered an out-of-bounds read in the GTCO digitizer USB
driver for the Linux kernel. A physically proximate attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2017-16643)

Update instructions

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

Ubuntu 17.10:
linux-image-4.13.0-19-generic

4.13.0-19.22
linux-image-4.13.0-19-generic-lpae

4.13.0-19.22
linux-image-generic-lpae 4.13.0.19.20
linux-image-4.13.0-19-lowlatency

4.13.0-19.22
linux-image-generic 4.13.0.19.20
linux-image-4.13.0-1008-raspi2

4.13.0-1008.8
linux-image-lowlatency 4.13.0.19.20
linux-image-raspi2 4.13.0.1008.6

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-1000405,

CVE-2017-12193,

CVE-2017-15299,

CVE-2017-15306,

CVE-2017-15951,

CVE-2017-16535,

CVE-2017-16643,

CVE-2017-16939

Read More

USN-3507-2: Linux kernel (GCP) vulnerabilities

Ubuntu Security Notice USN-3507-2

7th December, 2017

linux-gcp vulnerabilities

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

  • Ubuntu 16.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

  • linux-gcp
    – Linux kernel for Google Cloud Platform (GCP) systems

Details

Mohamed Ghannam discovered that a use-after-free vulnerability existed in
the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on-
write of transparent huge pages. A local attacker could use this to cause a
denial of service (application crashes) or possibly gain administrative
privileges. (CVE-2017-1000405)

Fan Wu, Haoran Qiu, and Shixiong Zhao discovered that the associative array
implementation in the Linux kernel sometimes did not properly handle adding
a new entry. A local attacker could use this to cause a denial of service
(system crash). (CVE-2017-12193)

Eric Biggers discovered that the key management subsystem in the Linux
kernel did not properly restrict adding a key that already exists but is
uninstantiated. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2017-15299)

It was discovered that a null pointer dereference error existed in the
PowerPC KVM implementation in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash). (CVE-2017-15306)

Eric Biggers discovered a race condition in the key management subsystem of
the Linux kernel around keys in a negative state. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-15951)

Update instructions

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

Ubuntu 16.04 LTS:
linux-image-gke

4.13.0.1002.4
linux-image-4.13.0-1002-gcp

4.13.0-1002.5
linux-image-gcp

4.13.0.1002.4

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-1000405,

CVE-2017-12193,

CVE-2017-15299,

CVE-2017-15306,

CVE-2017-15951,

CVE-2017-16939

Read More

USN-3511-1: Linux kernel (Azure) vulnerabilities

Ubuntu Security Notice USN-3511-1

7th December, 2017

linux-azure vulnerabilities

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

  • Ubuntu 16.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

  • linux-azure
    – Linux kernel for Microsoft Azure Cloud systems

Details

Mohamed Ghannam discovered that a use-after-free vulnerability existed in
the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on-
write of transparent huge pages. A local attacker could use this to cause a
denial of service (application crashes) or possibly gain administrative
privileges. (CVE-2017-1000405)

Update instructions

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

Ubuntu 16.04 LTS:
linux-image-azure

4.11.0.1016.16
linux-image-4.11.0-1016-azure

4.11.0-1016.16

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-1000405,

CVE-2017-16939

Read More

USN-3510-2: Linux kernel (Trusty HWE) vulnerabilities

Ubuntu Security Notice USN-3510-2

7th December, 2017

linux-lts-trusty vulnerabilities

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

  • Ubuntu 12.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

  • linux-lts-trusty
    – Linux hardware enablement kernel from Trusty for Precise ESM

Details

USN-3510-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
12.04 ESM.

Mohamed Ghannam discovered that a use-after-free vulnerability existed in
the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on-
write of transparent huge pages. A local attacker could use this to cause a
denial of service (application crashes) or possibly gain administrative
privileges. (CVE-2017-1000405)

Update instructions

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

Ubuntu 12.04 LTS:
linux-image-3.13.0-137-generic

3.13.0-137.186~precise1
linux-image-generic-lpae-lts-trusty

3.13.0.137.127
linux-image-3.13.0-137-generic-lpae

3.13.0-137.186~precise1
linux-image-generic-lts-trusty

3.13.0.137.127

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-1000405,

CVE-2017-16939

Read More

USN-3510-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3510-1

7th December, 2017

linux vulnerabilities

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

  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

  • linux
    – Linux kernel

Details

Mohamed Ghannam discovered that a use-after-free vulnerability existed in
the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on-
write of transparent huge pages. A local attacker could use this to cause a
denial of service (application crashes) or possibly gain administrative
privileges. (CVE-2017-1000405)

Update instructions

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

Ubuntu 14.04 LTS:
linux-image-3.13.0-137-powerpc-smp

3.13.0-137.186
linux-image-powerpc-smp

3.13.0.137.146
linux-image-powerpc-e500mc

3.13.0.137.146
linux-image-generic

3.13.0.137.146
linux-image-3.13.0-137-powerpc64-smp

3.13.0-137.186
linux-image-3.13.0-137-powerpc64-emb

3.13.0-137.186
linux-image-powerpc64-emb

3.13.0.137.146
linux-image-3.13.0-137-generic

3.13.0-137.186
linux-image-generic-lpae

3.13.0.137.146
linux-image-powerpc-e500

3.13.0.137.146
linux-image-powerpc64-smp

3.13.0.137.146
linux-image-3.13.0-137-generic-lpae

3.13.0-137.186
linux-image-3.13.0-137-powerpc-e500mc

3.13.0-137.186
linux-image-3.13.0-137-powerpc-e500

3.13.0-137.186
linux-image-lowlatency

3.13.0.137.146
linux-image-3.13.0-137-lowlatency

3.13.0-137.186

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-1000405,

CVE-2017-16939

Read More

USN-3509-2: Linux kernel (Xenial HWE) vulnerabilities

Ubuntu Security Notice USN-3509-2

7th December, 2017

linux-lts-xenial, linux-aws vulnerabilities

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

  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

  • linux-aws
    – Linux kernel for Amazon Web Services (AWS) systems

  • linux-lts-xenial
    – Linux hardware enablement kernel from Xenial for Trusty

Details

USN-3509-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.

Mohamed Ghannam discovered that a use-after-free vulnerability existed in
the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on-
write of transparent huge pages. A local attacker could use this to cause a
denial of service (application crashes) or possibly gain administrative
privileges. (CVE-2017-1000405)

Fan Wu, Haoran Qiu, and Shixiong Zhao discovered that the associative array
implementation in the Linux kernel sometimes did not properly handle adding
a new entry. A local attacker could use this to cause a denial of service
(system crash). (CVE-2017-12193)

Andrey Konovalov discovered an out-of-bounds read in the GTCO digitizer USB
driver for the Linux kernel. A physically proximate attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2017-16643)

Update instructions

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

Ubuntu 14.04 LTS:
linux-image-powerpc-smp-lts-xenial 4.4.0.103.86
linux-image-powerpc64-emb-lts-xenial 4.4.0.103.86
linux-image-4.4.0-1005-aws

4.4.0-1005.5
linux-image-generic-lts-xenial 4.4.0.103.86
linux-image-4.4.0-103-powerpc64-smp

4.4.0-103.126~14.04.1
linux-image-lowlatency-lts-xenial 4.4.0.103.86
linux-image-4.4.0-103-powerpc-smp

4.4.0-103.126~14.04.1
linux-image-powerpc-e500mc-lts-xenial 4.4.0.103.86
linux-image-generic-lpae-lts-xenial 4.4.0.103.86
linux-image-4.4.0-103-powerpc64-emb

4.4.0-103.126~14.04.1
linux-image-4.4.0-103-generic

4.4.0-103.126~14.04.1
linux-image-4.4.0-103-generic-lpae

4.4.0-103.126~14.04.1
linux-image-powerpc64-smp-lts-xenial 4.4.0.103.86
linux-image-aws 4.4.0.1005.5
linux-image-4.4.0-103-powerpc-e500mc

4.4.0-103.126~14.04.1
linux-image-4.4.0-103-lowlatency

4.4.0-103.126~14.04.1

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-1000405,

CVE-2017-12193,

CVE-2017-16643,

CVE-2017-16939

Read More