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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.
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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
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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
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