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USN-4017-1: Linux kernel vulnerabilities

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:

Summary

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

Software Description

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-aws5.0.0-1008.8
linux-image-5.0.0-1008-gcp5.0.0-1008.8
linux-image-5.0.0-1008-kvm5.0.0-1008.8
linux-image-5.0.0-1010-raspi25.0.0-1010.10
linux-image-5.0.0-1014-snapdragon5.0.0-1014.14
linux-image-5.0.0-17-generic5.0.0-17.18
linux-image-5.0.0-17-generic-lpae5.0.0-17.18
linux-image-5.0.0-17-lowlatency5.0.0-17.18
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-gcp4.18.0-1013.14
linux-image-4.18.0-1014-kvm4.18.0-1014.14
linux-image-4.18.0-1016-raspi24.18.0-1016.18
linux-image-4.18.0-1018-aws4.18.0-1018.20
linux-image-4.18.0-1020-azure4.18.0-1020.20
linux-image-4.18.0-22-generic4.18.0-22.23
linux-image-4.18.0-22-generic-lpae4.18.0-22.23
linux-image-4.18.0-22-lowlatency4.18.0-22.23
linux-image-4.18.0-22-snapdragon4.18.0-22.23
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-oracle4.15.0-1015.17
linux-image-4.15.0-1034-gcp4.15.0-1034.36
linux-image-4.15.0-1036-kvm4.15.0-1036.36
linux-image-4.15.0-1038-raspi24.15.0-1038.40
linux-image-4.15.0-1041-aws4.15.0-1041.43
linux-image-4.15.0-1043-oem4.15.0-1043.48
linux-image-4.15.0-1055-snapdragon4.15.0-1055.59
linux-image-4.15.0-52-generic4.15.0-52.56
linux-image-4.15.0-52-generic-lpae4.15.0-52.56
linux-image-4.15.0-52-lowlatency4.15.0-52.56
linux-image-4.18.0-1020-azure4.18.0-1020.20~18.04.1
linux-image-4.18.0-22-generic4.18.0-22.23~18.04.1
linux-image-4.18.0-22-generic-lpae4.18.0-22.23~18.04.1
linux-image-4.18.0-22-lowlatency4.18.0-22.23~18.04.1
linux-image-4.18.0-22-snapdragon4.18.0-22.23~18.04.1
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-oracle4.15.0-1015.17~16.04.1
linux-image-4.15.0-1034-gcp4.15.0-1034.36~16.04.1
linux-image-4.15.0-1041-aws4.15.0-1041.43~16.04.1
linux-image-4.15.0-1047-azure4.15.0-1047.51
linux-image-4.15.0-52-generic4.15.0-52.56~16.04.1
linux-image-4.15.0-52-generic-lpae4.15.0-52.56~16.04.1
linux-image-4.15.0-52-lowlatency4.15.0-52.56~16.04.1
linux-image-4.4.0-1048-kvm4.4.0-1048.55
linux-image-4.4.0-1085-aws4.4.0-1085.96
linux-image-4.4.0-1111-raspi24.4.0-1111.120
linux-image-4.4.0-1115-snapdragon4.4.0-1115.121
linux-image-4.4.0-151-generic4.4.0-151.178
linux-image-4.4.0-151-generic-lpae4.4.0-151.178
linux-image-4.4.0-151-lowlatency4.4.0-151.178
linux-image-4.4.0-151-powerpc-e500mc4.4.0-151.178
linux-image-4.4.0-151-powerpc-smp4.4.0-151.178
linux-image-4.4.0-151-powerpc64-emb4.4.0-151.178
linux-image-4.4.0-151-powerpc64-smp4.4.0-151.178
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

Source: USN-4017-1: Linux kernel vulnerabilities

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