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

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

                               ESB-2019.2156
                 USN-4017-1: Linux kernel vulnerabilities
                               18 June 2019

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

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

Product:           linux kernel
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-11478 CVE-2019-11477 

Reference:         ESB-2019.2155
                   ESB-2019.2149.2
                   ESB-2019.2132.2

Original Bulletin: 
   https://usn.ubuntu.com/4017-1/
   https://usn.ubuntu.com/4017-2/

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

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

USN-4017-1: Linux kernel vulnerabilities
17 June 2019

linux, linux-aws, linux-aws-hwe, linux-azure, linux-gcp, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 19.04
  o Ubuntu 18.10
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS

Summary

The system could be made to crash if it received specially crafted network
traffic.

Software Description

  o linux - Linux kernel
  o linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  o linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  o linux-kvm - Linux kernel for cloud environments
  o linux-raspi2 - Linux kernel for Raspberry Pi 2
  o linux-snapdragon - Linux kernel for Snapdragon processors
  o linux-azure - Linux kernel for Microsoft Azure Cloud systems
  o linux-hwe - Linux hardware enablement (HWE) kernel
  o linux-oem - Linux kernel for OEM processors
  o linux-oracle - Linux kernel for Oracle Cloud systems
  o linux-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems

Details

Jonathan Looney discovered that the TCP retransmission queue implementation in
the Linux kernel could be fragmented when handling certain TCP Selective
Acknowledgment (SACK) sequences. A remote attacker could use this to cause a
denial of service. (CVE-2019-11478)

Jonathan Looney discovered that an integer overflow existed in the Linux kernel
when handling TCP Selective Acknowledgments (SACKs). A remote attacker could
use this to cause a denial of service (system crash). (CVE-2019-11477)

Update instructions

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

Ubuntu 19.04
    linux-image-5.0.0-1008-aws - 5.0.0-1008.8
    linux-image-5.0.0-1008-gcp - 5.0.0-1008.8
    linux-image-5.0.0-1008-kvm - 5.0.0-1008.8
    linux-image-5.0.0-1010-raspi2 - 5.0.0-1010.10
    linux-image-5.0.0-1014-snapdragon - 5.0.0-1014.14
    linux-image-5.0.0-17-generic - 5.0.0-17.18
    linux-image-5.0.0-17-generic-lpae - 5.0.0-17.18
    linux-image-5.0.0-17-lowlatency - 5.0.0-17.18
    linux-image-aws - 5.0.0.1008.8
    linux-image-gcp - 5.0.0.1008.8
    linux-image-generic - 5.0.0.17.18
    linux-image-generic-lpae - 5.0.0.17.18
    linux-image-gke - 5.0.0.1008.8
    linux-image-kvm - 5.0.0.1008.8
    linux-image-lowlatency - 5.0.0.17.18
    linux-image-raspi2 - 5.0.0.1010.7
    linux-image-snapdragon - 5.0.0.1014.7
    linux-image-virtual - 5.0.0.17.18
Ubuntu 18.10
    linux-image-4.18.0-1013-gcp - 4.18.0-1013.14
    linux-image-4.18.0-1014-kvm - 4.18.0-1014.14
    linux-image-4.18.0-1016-raspi2 - 4.18.0-1016.18
    linux-image-4.18.0-1018-aws - 4.18.0-1018.20
    linux-image-4.18.0-1020-azure - 4.18.0-1020.20
    linux-image-4.18.0-22-generic - 4.18.0-22.23
    linux-image-4.18.0-22-generic-lpae - 4.18.0-22.23
    linux-image-4.18.0-22-lowlatency - 4.18.0-22.23
    linux-image-4.18.0-22-snapdragon - 4.18.0-22.23
    linux-image-aws - 4.18.0.1018.18
    linux-image-azure - 4.18.0.1020.21
    linux-image-gcp - 4.18.0.1013.13
    linux-image-generic - 4.18.0.22.23
    linux-image-generic-lpae - 4.18.0.22.23
    linux-image-gke - 4.18.0.1013.13
    linux-image-kvm - 4.18.0.1014.14
    linux-image-lowlatency - 4.18.0.22.23
    linux-image-raspi2 - 4.18.0.1016.13
    linux-image-snapdragon - 4.18.0.22.23
    linux-image-virtual - 4.18.0.22.23
Ubuntu 18.04 LTS
    linux-image-4.15.0-1015-oracle - 4.15.0-1015.17
    linux-image-4.15.0-1034-gcp - 4.15.0-1034.36
    linux-image-4.15.0-1036-kvm - 4.15.0-1036.36
    linux-image-4.15.0-1038-raspi2 - 4.15.0-1038.40
    linux-image-4.15.0-1041-aws - 4.15.0-1041.43
    linux-image-4.15.0-1043-oem - 4.15.0-1043.48
    linux-image-4.15.0-1055-snapdragon - 4.15.0-1055.59
    linux-image-4.15.0-52-generic - 4.15.0-52.56
    linux-image-4.15.0-52-generic-lpae - 4.15.0-52.56
    linux-image-4.15.0-52-lowlatency - 4.15.0-52.56
    linux-image-4.18.0-1020-azure - 4.18.0-1020.20~18.04.1
    linux-image-4.18.0-22-generic - 4.18.0-22.23~18.04.1
    linux-image-4.18.0-22-generic-lpae - 4.18.0-22.23~18.04.1
    linux-image-4.18.0-22-lowlatency - 4.18.0-22.23~18.04.1
    linux-image-4.18.0-22-snapdragon - 4.18.0-22.23~18.04.1
    linux-image-aws - 4.15.0.1041.40
    linux-image-azure - 4.18.0.1020.19
    linux-image-gcp - 4.15.0.1034.36
    linux-image-generic - 4.15.0.52.54
    linux-image-generic-hwe-18.04 - 4.18.0.22.72
    linux-image-generic-lpae - 4.15.0.52.54
    linux-image-generic-lpae-hwe-18.04 - 4.18.0.22.72
    linux-image-kvm - 4.15.0.1036.36
    linux-image-lowlatency - 4.15.0.52.54
    linux-image-lowlatency-hwe-18.04 - 4.18.0.22.72
    linux-image-oem - 4.15.0.1043.47
    linux-image-oracle - 4.15.0.1015.18
    linux-image-raspi2 - 4.15.0.1038.36
    linux-image-snapdragon - 4.15.0.1055.58
    linux-image-snapdragon-hwe-18.04 - 4.18.0.22.72
    linux-image-virtual - 4.15.0.52.54
    linux-image-virtual-hwe-18.04 - 4.18.0.22.72
Ubuntu 16.04 LTS
    linux-image-4.15.0-1015-oracle - 4.15.0-1015.17~16.04.1
    linux-image-4.15.0-1034-gcp - 4.15.0-1034.36~16.04.1
    linux-image-4.15.0-1041-aws - 4.15.0-1041.43~16.04.1
    linux-image-4.15.0-1047-azure - 4.15.0-1047.51
    linux-image-4.15.0-52-generic - 4.15.0-52.56~16.04.1
    linux-image-4.15.0-52-generic-lpae - 4.15.0-52.56~16.04.1
    linux-image-4.15.0-52-lowlatency - 4.15.0-52.56~16.04.1
    linux-image-4.4.0-1048-kvm - 4.4.0-1048.55
    linux-image-4.4.0-1085-aws - 4.4.0-1085.96
    linux-image-4.4.0-1111-raspi2 - 4.4.0-1111.120
    linux-image-4.4.0-1115-snapdragon - 4.4.0-1115.121
    linux-image-4.4.0-151-generic - 4.4.0-151.178
    linux-image-4.4.0-151-generic-lpae - 4.4.0-151.178
    linux-image-4.4.0-151-lowlatency - 4.4.0-151.178
    linux-image-4.4.0-151-powerpc-e500mc - 4.4.0-151.178
    linux-image-4.4.0-151-powerpc-smp - 4.4.0-151.178
    linux-image-4.4.0-151-powerpc64-emb - 4.4.0-151.178
    linux-image-4.4.0-151-powerpc64-smp - 4.4.0-151.178
    linux-image-aws - 4.4.0.1085.88
    linux-image-aws-hwe - 4.15.0.1041.41
    linux-image-azure - 4.15.0.1047.51
    linux-image-gcp - 4.15.0.1034.48
    linux-image-generic - 4.4.0.151.159
    linux-image-generic-hwe-16.04 - 4.15.0.52.73
    linux-image-generic-lpae - 4.4.0.151.159
    linux-image-generic-lpae-hwe-16.04 - 4.15.0.52.73
    linux-image-gke - 4.15.0.1034.48
    linux-image-kvm - 4.4.0.1048.48
    linux-image-lowlatency - 4.4.0.151.159
    linux-image-lowlatency-hwe-16.04 - 4.15.0.52.73
    linux-image-oem - 4.15.0.52.73
    linux-image-oracle - 4.15.0.1015.9
    linux-image-powerpc-e500mc - 4.4.0.151.159
    linux-image-powerpc-smp - 4.4.0.151.159
    linux-image-powerpc64-emb - 4.4.0.151.159
    linux-image-powerpc64-smp - 4.4.0.151.159
    linux-image-raspi2 - 4.4.0.1111.111
    linux-image-snapdragon - 4.4.0.1115.107
    linux-image-virtual - 4.4.0.151.159
    linux-image-virtual-hwe-16.04 - 4.15.0.52.73

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

  o CVE-2019-11477
  o CVE-2019-11478
  o https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic

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

USN-4017-2: Linux kernel vulnerabilities
17 June 2019

linux, linux-aws, linux-azure, linux-lts-trusty, linux-lts-xenial vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 14.04 ESM
  o Ubuntu 12.04 ESM

Summary

The system could be made to crash if it received specially crafted network
traffic.

Software Description

  o linux - Linux kernel
  o linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  o linux-azure - Linux kernel for Microsoft Azure Cloud systems
  o linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty
  o linux-lts-trusty - Linux hardware enablement kernel from Trusty for Precise
    ESM

Details

USN-4017-1 fixed vulnerabilities in the Linux kernel for Ubuntu. This update
provides the corresponding updates for the Linux kernel for Ubuntu 16.04 ESM
and Ubuntu 14.04 ESM.

Jonathan Looney discovered that the TCP retransmission queue implementation in
the Linux kernel could be fragmented when handling certain TCP Selective
Acknowledgment (SACK) sequences. A remote attacker could use this to cause a
denial of service. (CVE-2019-11478)

Jonathan Looney discovered that an integer overflow existed in the Linux kernel
when handling TCP Selective Acknowledgments (SACKs). A remote attacker could
use this to cause a denial of service (system crash). (CVE-2019-11477)

Update instructions

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

Ubuntu 14.04 ESM
    linux-image-3.13.0-171-generic - 3.13.0-171.222
    linux-image-3.13.0-171-generic-lpae - 3.13.0-171.222
    linux-image-3.13.0-171-lowlatency - 3.13.0-171.222
    linux-image-4.15.0-1047-azure - 4.15.0-1047.51~14.04.1
    linux-image-4.4.0-1046-aws - 4.4.0-1046.50
    linux-image-4.4.0-151-generic - 4.4.0-151.178~14.04.1
    linux-image-4.4.0-151-generic-lpae - 4.4.0-151.178~14.04.1
    linux-image-4.4.0-151-lowlatency - 4.4.0-151.178~14.04.1
    linux-image-aws - 4.4.0.1046.47
    linux-image-azure - 4.15.0.1047.34
    linux-image-generic - 3.13.0.171.182
    linux-image-generic-lpae - 3.13.0.171.182
    linux-image-generic-lpae-lts-xenial - 4.4.0.151.133
    linux-image-generic-lts-xenial - 4.4.0.151.133
    linux-image-lowlatency-lts-xenial - 4.4.0.151.133
Ubuntu 12.04 ESM
    linux-image-3.13.0-171-generic - 3.13.0-171.222~12.04.1
    linux-image-3.13.0-171-generic-lpae - 3.13.0-171.222~12.04.1
    linux-image-3.13.0-171-lowlatency - 3.13.0-171.222~12.04.1
    linux-image-3.2.0-141-generic - 3.2.0-141.188
    linux-image-generic - 3.2.0.141.156
    linux-image-generic-lpae-lts-trusty - 3.13.0.171.159
    linux-image-generic-lts-trusty - 3.13.0.171.159

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

  o USN-4017-1
  o CVE-2019-11477
  o CVE-2019-11478
  o https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic

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

iQIVAwUBXQg8l2aOgq3Tt24GAQjzQQ//XB5lQ7zDLQhXvS6712hUzapWasWfqDa0
sGpsb3a3BW/XJ82dGRTnEIr01UPWkmxHcwFJmn5ac1Xpg2kgkbNPFmEDyftyjJ7V
j0KG9pW1xgTVLjcNXB3bjVxANbZJl3M/qh0CObsiuoRiIoLjecSmrnCUL17t7kS9
AThwi4Zouj9SPWnp/rntm94X8rvIPC1yXnvQF4rEq/CyuMqiJEwSKPdAji5m4UC5
cA3arO8jxsQEwgyZTqSiUopIP4jtBZ09Qoo7jJXd7+uCxwk4iBgpGR4Uwbn+AM/r
Ag66LH+igqmpuFA27nseOOjiZ1RtRsh9sZQNw13Ug3GFu6yEEWLELB8j1FaVimZz
mxyF0U5qMg7xWpVcaOPIVD6vrR+LMoQy+tj/G2RFRZ3beEfWDh7rglkPep690Aor
mDZFXl0dyP9VLmrZHxN2BaMoGDHTj0h78J0kTW4xR+Wi7Yd8q9FY1xOqibmjWtHu
g4ggiFLUgyna47BbFSdJil3vL8fS9supQNQzvGxAk5Bpk3shprUl7WznvFaayV9F
UB82rqMItnaN7KJ5JQMWO9liglzpapbp1yZS5OB5EbXIkqMSnCSrsqOucmkfzVOs
tDOPVacMmY6mPH4s2I9Ff8216bYt06GpKDPyhjv2YjI8zKpfpuVa7P4mqmIS5+S/
8I7ccRx5b48=
=7G/n
-----END PGP SIGNATURE-----