ESB-2018.3577 - [Ubuntu] kernel: Multiple vulnerabilities 2018-11-15

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

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==========================================================================
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--------------------

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