ESB-2017.2544.2 - UPDATE [Ubuntu] kernel: Multiple vulnerabilities 2017-10-12

Printable version
PGP/GPG verifiable version

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

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

                              ESB-2017.2544.2
                       Linux kernel vulnerabilities
                              12 October 2017

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

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

Product:           kernel
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Root Compromise   -- Existing Account
                   Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-1000255 CVE-2017-14106 

Reference:         ESB-2017.2537
                   ESB-2017.2401

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3443-1
   http://www.ubuntu.com/usn/usn-3443-2
   https://www.ubuntu.com/usn/usn-3443-3

Comment: This bulletin contains three (3) Ubuntu security advisories.

Revision History:  October 12 2017: updated package versions
                   October 11 2017: Initial Release

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

==========================================================================
Ubuntu Security Notice USN-3443-1
October 10, 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:

It was discovered that on the PowerPC architecture, the kernel did not
properly sanitize the signal stack when handling sigreturn(). A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2017-1000255)

Andrey Konovalov discovered that a divide-by-zero error existed in the TCP
stack implementation in the Linux kernel. A local attacker could use this
to cause a denial of service (system crash). (CVE-2017-14106)

Update instructions:

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

Ubuntu 17.04:
  linux-image-4.10.0-1019-raspi2  4.10.0-1019.22
  linux-image-4.10.0-37-generic   4.10.0-37.41
  linux-image-4.10.0-37-generic-lpae  4.10.0-37.41
  linux-image-4.10.0-37-lowlatency  4.10.0-37.41
  linux-image-generic             4.10.0.37.37
  linux-image-generic-lpae        4.10.0.37.37
  linux-image-lowlatency          4.10.0.37.37
  linux-image-powerpc-e500mc      4.10.0.37.37
  linux-image-powerpc-smp         4.10.0.37.37
  linux-image-powerpc64-emb       4.10.0.37.37
  linux-image-powerpc64-smp       4.10.0.37.37
  linux-image-raspi2              4.10.0.1019.20
  linux-image-virtual             4.10.0.37.37

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://www.ubuntu.com/usn/usn-3443-1
  CVE-2017-1000255, CVE-2017-14106

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.10.0-37.41
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.10.0-1019.22

==========================================================================
Ubuntu Security Notice USN-3443-2
October 10, 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-3443-1 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.

It was discovered that on the PowerPC architecture, the kernel did not
properly sanitize the signal stack when handling sigreturn(). A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2017-1000255)

Andrey Konovalov discovered that a divide-by-zero error existed in the TCP
stack implementation in the Linux kernel. A local attacker could use this
to cause a denial of service (system crash). (CVE-2017-14106)

Update instructions:

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

Ubuntu 16.04 LTS:
  linux-image-4.10.0-37-generic   4.10.0-37.41~16.04.1
  linux-image-4.10.0-37-generic-lpae  4.10.0-37.41~16.04.1
  linux-image-4.10.0-37-lowlatency  4.10.0-37.41~16.04.1
  linux-image-generic-hwe-16.04   4.10.0.37.39
  linux-image-generic-lpae-hwe-16.04  4.10.0.37.39
  linux-image-lowlatency-hwe-16.04  4.10.0.37.39

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://www.ubuntu.com/usn/usn-3443-2
  https://www.ubuntu.com/usn/usn-3443-1
  CVE-2017-1000255, CVE-2017-14106

Package Information:
  https://launchpad.net/ubuntu/+source/linux-hwe/4.10.0-37.41~16.04.1

==========================================================================
Ubuntu Security Notice USN-3443-3
October 11, 2017

linux-gcp vulnerability
==========================================================================

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

- - Ubuntu 16.04 LTS

Summary:

The system could be made to crash under certain conditions.

Software Description:
- - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

Details:

Andrey Konovalov discovered that a divide-by-zero error existed in the TCP
stack implementation in the Linux kernel. A local attacker could use this
to cause a denial of service (system crash). (CVE-2017-14106)

Update instructions:

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

Ubuntu 16.04 LTS:
  linux-image-4.10.0-1007-gcp     4.10.0-1007.7
  linux-image-gcp                 4.10.0.1007.9

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://www.ubuntu.com/usn/usn-3443-3
  https://www.ubuntu.com/usn/usn-3443-1
  CVE-2017-14106

Package Information:
  https://launchpad.net/ubuntu/+source/linux-gcp/4.10.0-1007.7

- --------------------------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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=Wwu3
-----END PGP SIGNATURE-----

« Back to bulletins