CVE-2019-10638

Published: 5 July 2019

In the Linux kernel before 5.1.7, a device can be tracked by an attacker using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic is sent to multiple destination IP addresses, it is possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). An attack may be conducted by hosting a crafted web page that uses WebRTC or gQUIC to force UDP traffic to attacker-controlled IP addresses.

From the Ubuntu Security Team

Amit Klein and Benny Pinkas discovered that the Linux kernel did not sufficiently randomize IP ID values generated for connectionless networking protocols. A remote attacker could use this to track particular Linux devices.

Notes

Author	Note
tyhicks	Kernels prior to 4.1 also need the following commit https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-3.16.y&id=8b197d3ce585d6777197e0633d71e5af7d98cb35

Priority

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-60.67)
	cosmic	Ignored (end of life)
	disco	Released (5.0.0-27.28)
	eoan	Not vulnerable (5.2.0-8.9)
	trusty	Ignored (was needs-triage ESM criteria)
	upstream	Released (5.2~rc1)
	xenial	Released (4.4.0-161.189)
	Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Fixed by 355b98553789b646ed97ad801a619ff898471b92 Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Fixed by df453700e8d81b1bdafdf684365ee2b9431fb702
linux-aws Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1047.49)
	cosmic	Ignored (end of life)
	disco	Released (5.0.0-1014.16)
	eoan	Not vulnerable (5.3.0-1003.3)
	trusty	Ignored (was needs-triage ESM criteria)
	upstream	Released (5.2~rc1)
	xenial	Released (4.4.0-1092.103)
linux-aws-5.0 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.0.0-1021.24~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-aws-hwe Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Released (4.15.0-1047.49~16.04.1)
linux-azure Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1018.19~18.04.1)
	cosmic	Ignored (end of life)
	disco	Released (5.0.0-1018.19)
	eoan	Not vulnerable (5.0.0-1018.19)
	trusty	Ignored (was needs-triage ESM criteria)
	upstream	Released (5.2~rc1)
	xenial	Released (4.15.0-1056.61)
linux-azure-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1007.8~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-azure-edge Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1018.19~18.04.1)
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Released (4.15.0-1056.61)
linux-euclid Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Ignored (end of life, was needs-triage)
linux-flo Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Ignored (abandoned)
linux-gcp Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1042.45)
	cosmic	Ignored (end of life)
	disco	Released (5.0.0-1015.15)
	eoan	Not vulnerable (5.0.0-1015.15)
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Released (4.15.0-1041.43)
linux-gcp-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1008.9~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-gcp-edge Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1042.45)
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-gke Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Ignored (end of standard support)
linux-gke-4.15 Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1041.43)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-gke-5.0 Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1015.15~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-goldfish Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Ignored (end of life)
linux-grouper Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-27.28~18.04.1)
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Released (4.15.0-60.67~16.04.1)
linux-hwe-edge Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was pending)
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Released (4.15.0-60.67~16.04.1)
linux-kvm Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1043.43)
	cosmic	Ignored (end of life)
	disco	Released (5.0.0-1015.16)
	eoan	Not vulnerable (5.0.0-1015.16)
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Released (4.4.0-1056.63)
linux-lts-trusty Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Ignored (was needs-triage ESM criteria)
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-mako Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Ignored (abandoned)
linux-manta Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-oem Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1056.65)
	cosmic	Ignored (end of life)
	disco	Ignored (end of life, was pending)
	eoan	Released (4.15.0-1059.68)
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Ignored (end of standard support, was needs-triage)
linux-oem-5.4 Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-oem-osp1 Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1020.22)
	disco	Ignored (end of life, was pending)
	eoan	Released (5.0.0-1022.24)
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-oracle Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1022.25)
	cosmic	Ignored (end of life)
	disco	Released (5.0.0-1004.8)
	eoan	Not vulnerable (5.3.0-1002.2)
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Released (4.15.0-1022.25~16.04.1)
linux-oracle-5.0 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.0.0-1007.12~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1044.47)
	cosmic	Ignored (end of life)
	disco	Released (5.0.0-1015.15)
	eoan	Not vulnerable (5.0.0-1015.15)
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Released (4.4.0-1120.129)
linux-raspi2-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1017.19~18.04.1)
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Does not exist
linux-snapdragon Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1062.69)
	cosmic	Does not exist
	disco	Released (5.0.0-1019.20)
	eoan	Does not exist
	trusty	Does not exist
	upstream	Released (5.2~rc1)
	xenial	Released (4.4.0-1124.130)

Severity score breakdown

Parameter	Value
Base score	6.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

References

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