-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.3577
                       Linux kernel vulnerabilities
                             15 November 2018

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           linux
                   linux-aws
                   linux-kvm
                   linux-raspi2
                   linux-snapdragon
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Access Privileged Data          -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-18021 CVE-2018-17972 CVE-2018-14617
                   CVE-2018-14609 CVE-2018-13096 CVE-2018-13053
                   CVE-2018-10880  

Reference:         ESB-2018.2698
                   ESB-2018.3036
                   ESB-2018.3057

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3821-1
   http://www.ubuntu.com/usn/usn-3821-2

Comment: This bulletin contains two (2) Ubuntu security advisories.

- --------------------------BEGIN INCLUDED TEXT--------------------

==========================================================================
Ubuntu Security Notice USN-3821-1
November 14, 2018

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:

Wen Xu discovered that the ext4 filesystem implementation in the Linux
kernel did not properly ensure that xattr information remained in inode
bodies. An attacker could use this to construct a malicious ext4 image
that, when mounted, could cause a denial of service (system crash).
(CVE-2018-10880)

It was discovered that the alarmtimer implementation in the Linux kernel
contained an integer overflow vulnerability. A local attacker could use
this to cause a denial of service. (CVE-2018-13053)

Wen Xu discovered that the f2fs filesystem implementation in the Linux
kernel did not properly validate metadata. An attacker could use this to
construct a malicious f2fs image that, when mounted, could cause a denial
of service (system crash). (CVE-2018-13096)

Wen Xu and Po-Ning Tseng discovered that the btrfs filesystem
implementation in the Linux kernel did not properly handle relocations 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-2018-14609)

Wen Xu discovered that the HFS+ filesystem implementation in the Linux
kernel did not properly handle malformed catalog data in some situations.
An attacker could use this to construct a malicious HFS+ image that, when
mounted, could cause a denial of service (system crash). (CVE-2018-14617)

Jann Horn discovered that the procfs file system implementation in the
Linux kernel did not properly restrict the ability to inspect the kernel
stack of an arbitrary task. A local attacker could use this to expose
sensitive information. (CVE-2018-17972)

It was discovered that the KVM implementation in the Linux kernel on ARM
64bit processors did not properly handle some ioctls. An attacker with the
privilege to create KVM-based virtual machines could use this to cause a
denial of service (host system crash) or execute arbitrary code in the
host. (CVE-2018-18021)

Update instructions:

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1037-kvm      4.4.0-1037.43
  linux-image-4.4.0-1072-aws      4.4.0-1072.82
  linux-image-4.4.0-1100-raspi2   4.4.0-1100.108
  linux-image-4.4.0-1104-snapdragon  4.4.0-1104.109
  linux-image-4.4.0-139-generic   4.4.0-139.165
  linux-image-4.4.0-139-generic-lpae  4.4.0-139.165
  linux-image-4.4.0-139-lowlatency  4.4.0-139.165
  linux-image-4.4.0-139-powerpc-e500mc  4.4.0-139.165
  linux-image-4.4.0-139-powerpc-smp  4.4.0-139.165
  linux-image-4.4.0-139-powerpc64-emb  4.4.0-139.165
  linux-image-4.4.0-139-powerpc64-smp  4.4.0-139.165
  linux-image-aws                 4.4.0.1072.74
  linux-image-generic             4.4.0.139.145
  linux-image-generic-lpae        4.4.0.139.145
  linux-image-kvm                 4.4.0.1037.36
  linux-image-lowlatency          4.4.0.139.145
  linux-image-powerpc-e500mc      4.4.0.139.145
  linux-image-powerpc-smp         4.4.0.139.145
  linux-image-powerpc64-emb       4.4.0.139.145
  linux-image-powerpc64-smp       4.4.0.139.145
  linux-image-raspi2              4.4.0.1100.100
  linux-image-snapdragon          4.4.0.1104.96

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/usn/usn-3821-1
  CVE-2018-10880, CVE-2018-13053, CVE-2018-13096, CVE-2018-14609,
  CVE-2018-14617, CVE-2018-17972, CVE-2018-18021

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.4.0-139.165
  https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1072.82
  https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1037.43
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1100.108
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1104.109

- -----BEGIN PGP SIGNATURE-----
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=95eM
- -----END PGP SIGNATURE-----

- --------------------------------------------------------------------------------

==========================================================================
Ubuntu Security Notice USN-3821-2
November 14, 2018

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-3821-1 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.

Wen Xu discovered that the ext4 filesystem implementation in the Linux
kernel did not properly ensure that xattr information remained in inode
bodies. An attacker could use this to construct a malicious ext4 image
that, when mounted, could cause a denial of service (system crash).
(CVE-2018-10880)

It was discovered that the alarmtimer implementation in the Linux kernel
contained an integer overflow vulnerability. A local attacker could use
this to cause a denial of service. (CVE-2018-13053)

Wen Xu discovered that the f2fs filesystem implementation in the Linux
kernel did not properly validate metadata. An attacker could use this to
construct a malicious f2fs image that, when mounted, could cause a denial
of service (system crash). (CVE-2018-13096)

Wen Xu and Po-Ning Tseng discovered that the btrfs filesystem
implementation in the Linux kernel did not properly handle relocations 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-2018-14609)

Wen Xu discovered that the HFS+ filesystem implementation in the Linux
kernel did not properly handle malformed catalog data in some situations.
An attacker could use this to construct a malicious HFS+ image that, when
mounted, could cause a denial of service (system crash). (CVE-2018-14617)

Jann Horn discovered that the procfs file system implementation in the
Linux kernel did not properly restrict the ability to inspect the kernel
stack of an arbitrary task. A local attacker could use this to expose
sensitive information. (CVE-2018-17972)

It was discovered that the KVM implementation in the Linux kernel on ARM
64bit processors did not properly handle some ioctls. An attacker with the
privilege to create KVM-based virtual machines could use this to cause a
denial of service (host system crash) or execute arbitrary code in the
host. (CVE-2018-18021)

Update instructions:

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

Ubuntu 14.04 LTS:
  linux-image-4.4.0-1034-aws      4.4.0-1034.37
  linux-image-4.4.0-139-generic   4.4.0-139.165~14.04.1
  linux-image-4.4.0-139-generic-lpae  4.4.0-139.165~14.04.1
  linux-image-4.4.0-139-lowlatency  4.4.0-139.165~14.04.1
  linux-image-4.4.0-139-powerpc-e500mc  4.4.0-139.165~14.04.1
  linux-image-4.4.0-139-powerpc-smp  4.4.0-139.165~14.04.1
  linux-image-4.4.0-139-powerpc64-emb  4.4.0-139.165~14.04.1
  linux-image-4.4.0-139-powerpc64-smp  4.4.0-139.165~14.04.1
  linux-image-aws                 4.4.0.1034.34
  linux-image-generic-lpae-lts-xenial  4.4.0.139.119
  linux-image-generic-lts-xenial  4.4.0.139.119
  linux-image-lowlatency-lts-xenial  4.4.0.139.119
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.139.119
  linux-image-powerpc-smp-lts-xenial  4.4.0.139.119
  linux-image-powerpc64-emb-lts-xenial  4.4.0.139.119
  linux-image-powerpc64-smp-lts-xenial  4.4.0.139.119

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/usn/usn-3821-2
  https://usn.ubuntu.com/usn/usn-3821-1
  CVE-2018-10880, CVE-2018-13053, CVE-2018-13096, CVE-2018-14609,
  CVE-2018-14617, CVE-2018-17972, CVE-2018-18021

Package Information:
  https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1034.37
  https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-139.165~14.04.1

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=wkWL
-----END PGP SIGNATURE-----