USN-4017-1: Linux kernel vulnerabilities
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:
- Ubuntu 19.04
- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary
The system could be made to crash if it received specially crafted
network traffic.
Software Description
- linux – Linux kernel
- linux-aws – Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp – Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm – Linux kernel for cloud environments
- linux-raspi2 – Linux kernel for Raspberry Pi 2
- linux-snapdragon – Linux kernel for Snapdragon processors
- linux-azure – Linux kernel for Microsoft Azure Cloud systems
- linux-hwe – Linux hardware enablement (HWE) kernel
- linux-oem – Linux kernel for OEM processors
- linux-oracle – Linux kernel for Oracle Cloud systems
- 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.
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