ESB-2018.0528.2 - UPDATE [Ubuntu] Kernel: Multiple vulnerabilities 2018-02-26

Printable version
PGP/GPG verifiable version

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

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

                              ESB-2018.0528.2
                         Kernel patched in Ubuntu
                             26 February 2018

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

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

Product:           Kernel
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Root Compromise        -- Existing Account
                   Access Privileged Data -- Existing Account
                   Denial of Service      -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-17712 CVE-2017-15115 CVE-2017-8824
                   CVE-2017-5715  

Reference:         ESB-2018.0044
                   ESB-2017.3259
                   ASB-2018.0002.4
                   ESB-2018.0042.2

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3581-1
   http://www.ubuntu.com/usn/usn-3581-2
   http://www.ubuntu.com/usn/usn-3582-1
   http://www.ubuntu.com/usn/usn-3582-2
   http://www.ubuntu.com/usn/usn-3581-3

Comment: This bulletin contains five (5) Ubuntu security advisories.

Revision History:  February 26 2018: Advisory published for Raspberry Pi 2 kernel
                   February 23 2018: Initial Release

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

USN-3581-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3581-1
22nd February, 2018

linux 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

Details

Mohamed Ghannam discovered that the IPv4 raw socket implementation in the
Linux kernel contained a race condition leading to uninitialized pointer
usage. A local attacker could use this to cause a denial of service or
possibly execute arbitrary code. (CVE-2017-17712)

ChunYu Wang discovered that a use-after-free vulnerability existed
in the SCTP protocol implementation in the Linux kernel. A local
attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code, (CVE-2017-15115)

Mohamed Ghannam discovered a use-after-free vulnerability in the DCCP
protocol implementation in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-8824)

USN-3541-1 mitigated CVE-2017-5715 (Spectre Variant 2) for the
amd64 architecture in Ubuntu 17.10. This update provides the
compiler-based retpoline kernel mitigation for the amd64 and i386
architectures. Original advisory details:

Jann Horn discovered that microprocessors utilizing speculative execution
and branch prediction may allow unauthorized memory reads via sidechannel
attacks. This flaw is known as Spectre. A local attacker could use this to
expose sensitive information, including kernel memory. (CVE-2017-5715)

Update instructions

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

Ubuntu 17.10:
    linux-image-generic 4.13.0.36.38
    linux-image-4.13.0-36-generic-lpae 4.13.0-36.40
    linux-image-generic-lpae 4.13.0.36.38
    linux-image-4.13.0-36-lowlatency 4.13.0-36.40
    linux-image-lowlatency 4.13.0.36.38
    linux-image-4.13.0-36-generic 4.13.0-36.40

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-2017-15115, CVE-2017-17712, CVE-2017-5715, CVE-2017-8824


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


USN-3581-2: Linux kernel (HWE) vulnerabilities

Ubuntu Security Notice USN-3581-2
22nd February, 2018

linux-hwe, linux-azure, linux-gcp, linux-oem 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
  * linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  * linux-hwe - Linux hardware enablement (HWE) kernel
  * linux-oem - Linux kernel for OEM processors

Details

USN-3581-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.10.
This update provides the corresponding updates for the Linux Hardware
Enablement (HWE) kernel from Ubuntu 17.10 for Ubuntu 16.04 LTS.

Mohamed Ghannam discovered that the IPv4 raw socket implementation in the
Linux kernel contained a race condition leading to uninitialized pointer
usage. A local attacker could use this to cause a denial of service or
possibly execute arbitrary code. (CVE-2017-17712)

ChunYu Wang discovered that a use-after-free vulnerability existed
in the SCTP protocol implementation in the Linux kernel. A local
attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code, (CVE-2017-15115)

Mohamed Ghannam discovered a use-after-free vulnerability in the DCCP
protocol implementation in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-8824)

USN-3541-2 mitigated CVE-2017-5715 (Spectre Variant 2) for the
amd64 architecture in Ubuntu 16.04 LTS. This update provides the
compiler-based retpoline kernel mitigation for the amd64 and i386
architectures. Original advisory details:

Jann Horn discovered that microprocessors utilizing speculative execution
and branch prediction may allow unauthorized memory reads via sidechannel
attacks. This flaw is known as Spectre. A local attacker could use this to
expose sensitive information, including kernel memory. (CVE-2017-5715)

Update instructions

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

Ubuntu 16.04 LTS:
    linux-image-gke 4.13.0.1011.13
    linux-image-4.13.0-36-generic 4.13.0-36.40~16.04.1
    linux-image-4.13.0-1011-gcp 4.13.0-1011.15
    linux-image-gcp 4.13.0.1011.13
    linux-image-generic-hwe-16.04 4.13.0.36.55
    linux-image-oem 4.13.0.1021.25
    linux-image-lowlatency-hwe-16.04 4.13.0.36.55
    linux-image-4.13.0-36-lowlatency 4.13.0-36.40~16.04.1
    linux-image-4.13.0-1011-azure 4.13.0-1011.14
    linux-image-4.13.0-36-generic-lpae 4.13.0-36.40~16.04.1
    linux-image-azure 4.13.0.1011.12
    linux-image-generic-lpae-hwe-16.04 4.13.0.36.55
    linux-image-4.13.0-1021-oem 4.13.0-1021.23

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-2017-15115, CVE-2017-17712, CVE-2017-5715, CVE-2017-8824

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

Ubuntu Security Notice USN-3582-1
February 22, 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:

Mohamed Ghannam discovered that the IPv4 raw socket implementation in the
Linux kernel contained a race condition leading to uninitialized pointer
usage. A local attacker could use this to cause a denial of service or
possibly execute arbitrary code. (CVE-2017-17712)

Laurent Guerby discovered that the mbcache feature in the ext2 and ext4
filesystems in the Linux kernel improperly handled xattr block caching. A
local attacker could use this to cause a denial of service. (CVE-2015-8952)

Vitaly Mayatskikh discovered that the SCSI subsystem in the Linux kernel
did not properly track reference counts when merging buffers. A local
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2017-12190)

ChunYu Wang discovered that a use-after-free vulnerability existed in the
SCTP protocol implementation in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code, (CVE-2017-15115)

Mohamed Ghannam discovered a use-after-free vulnerability in the DCCP
protocol implementation in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-8824)

USN-3540-1 mitigated CVE-2017-5715 (Spectre Variant 2) for the
amd64 architecture in Ubuntu 16.04 LTS. This update provides the
compiler-based retpoline kernel mitigation for the amd64 and i386
architectures. Original advisory details:

 Jann Horn discovered that microprocessors utilizing speculative execution
 and branch prediction may allow unauthorized memory reads via sidechannel
 attacks. This flaw is known as Spectre. A local attacker could use this to
 expose sensitive information, including kernel memory. (CVE-2017-5715)

Update instructions:

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1019-kvm      4.4.0-1019.24
  linux-image-4.4.0-1052-aws      4.4.0-1052.61
  linux-image-4.4.0-1085-raspi2   4.4.0-1085.93
  linux-image-4.4.0-1087-snapdragon  4.4.0-1087.92
  linux-image-4.4.0-116-generic   4.4.0-116.140
  linux-image-4.4.0-116-generic-lpae  4.4.0-116.140
  linux-image-4.4.0-116-lowlatency  4.4.0-116.140
  linux-image-4.4.0-116-powerpc-e500mc  4.4.0-116.140
  linux-image-4.4.0-116-powerpc-smp  4.4.0-116.140
  linux-image-4.4.0-116-powerpc64-emb  4.4.0-116.140
  linux-image-4.4.0-116-powerpc64-smp  4.4.0-116.140
  linux-image-aws                 4.4.0.1052.54
  linux-image-generic             4.4.0.116.122
  linux-image-generic-lpae        4.4.0.116.122
  linux-image-kvm                 4.4.0.1019.18
  linux-image-lowlatency          4.4.0.116.122
  linux-image-powerpc-e500mc      4.4.0.116.122
  linux-image-powerpc-smp         4.4.0.116.122
  linux-image-powerpc64-emb       4.4.0.116.122
  linux-image-powerpc64-smp       4.4.0.116.122
  linux-image-raspi2              4.4.0.1085.85
  linux-image-snapdragon          4.4.0.1087.79

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-3582-1
  CVE-2015-8952, CVE-2017-12190, CVE-2017-15115, CVE-2017-17712,
  CVE-2017-5715, CVE-2017-8824

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.4.0-116.140
  https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1052.61
  https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1019.24
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1085.93
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1087.92


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


Ubuntu Security Notice USN-3582-2
February 22, 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-3582-1 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 the IPv4 raw socket implementation in the
Linux kernel contained a race condition leading to uninitialized pointer
usage. A local attacker could use this to cause a denial of service or
possibly execute arbitrary code. (CVE-2017-17712)

Laurent Guerby discovered that the mbcache feature in the ext2 and ext4
filesystems in the Linux kernel improperly handled xattr block caching. A
local attacker could use this to cause a denial of service. (CVE-2015-8952)

Vitaly Mayatskikh discovered that the SCSI subsystem in the Linux kernel
did not properly track reference counts when merging buffers. A local
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2017-12190)

ChunYu Wang discovered that a use-after-free vulnerability existed in the
SCTP protocol implementation in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code, (CVE-2017-15115)

Mohamed Ghannam discovered a use-after-free vulnerability in the DCCP
protocol implementation in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-8824)

USN-3540-2 mitigated CVE-2017-5715 (Spectre Variant 2) for the
amd64 architecture in Ubuntu 14.04 LTS. This update provides the
compiler-based retpoline kernel mitigation for the amd64 and i386
architectures. Original advisory details:

 Jann Horn discovered that microprocessors utilizing speculative execution
 and branch prediction may allow unauthorized memory reads via sidechannel
 attacks. This flaw is known as Spectre. A local attacker could use this to
 expose sensitive information, including kernel memory. (CVE-2017-5715)

Update instructions:

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

Ubuntu 14.04 LTS:
  linux-image-4.4.0-1014-aws      4.4.0-1014.14
  linux-image-4.4.0-116-generic   4.4.0-116.140~14.04.1
  linux-image-4.4.0-116-generic-lpae  4.4.0-116.140~14.04.1
  linux-image-4.4.0-116-lowlatency  4.4.0-116.140~14.04.1
  linux-image-4.4.0-116-powerpc-e500mc  4.4.0-116.140~14.04.1
  linux-image-4.4.0-116-powerpc-smp  4.4.0-116.140~14.04.1
  linux-image-4.4.0-116-powerpc64-emb  4.4.0-116.140~14.04.1
  linux-image-4.4.0-116-powerpc64-smp  4.4.0-116.140~14.04.1
  linux-image-aws                 4.4.0.1014.14
  linux-image-generic-lpae-lts-xenial  4.4.0.116.98
  linux-image-generic-lts-xenial  4.4.0.116.98
  linux-image-lowlatency-lts-xenial  4.4.0.116.98
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.116.98
  linux-image-powerpc-smp-lts-xenial  4.4.0.116.98
  linux-image-powerpc64-emb-lts-xenial  4.4.0.116.98
  linux-image-powerpc64-smp-lts-xenial  4.4.0.116.98

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-3582-2
  https://usn.ubuntu.com/usn/usn-3582-1
  CVE-2015-8952, CVE-2017-12190, CVE-2017-15115, CVE-2017-17712,
  CVE-2017-5715, CVE-2017-8824

Package Information:
  https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1014.14
  https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-116.140~14.04.1


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


==========================================================================
Ubuntu Security Notice USN-3581-3
February 23, 2018

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-raspi2: Linux kernel for Raspberry Pi 2

Details:

Mohamed Ghannam discovered that the IPv4 raw socket implementation in the
Linux kernel contained a race condition leading to uninitialized pointer
usage. A local attacker could use this to cause a denial of service or
possibly execute arbitrary code. (CVE-2017-17712)

ChunYu Wang discovered that a use-after-free vulnerability existed in the
SCTP protocol implementation in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code, (CVE-2017-15115)

Mohamed Ghannam discovered a use-after-free vulnerability in the DCCP
protocol implementation in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-8824)

Update instructions:

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

Ubuntu 17.10:
  linux-image-4.13.0-1014-raspi2  4.13.0-1014.15
  linux-image-raspi2              4.13.0.1014.12

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-3581-3
  https://usn.ubuntu.com/usn/usn-3581-1
  CVE-2017-15115, CVE-2017-17712, CVE-2017-8824

Package Information:
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.13.0-1014.15

- --------------------------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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=KScx
-----END PGP SIGNATURE-----

« Back to bulletins