CVE-2017-6214

Published: 23 February 2017

The tcp_splice_read function in net/ipv4/tcp.c in the Linux kernel before 4.9.11 allows remote attackers to cause a denial of service (infinite loop and soft lockup) via vectors involving a TCP packet with the URG flag.

From the Ubuntu Security Team

Dmitry Vyukov discovered that the Linux kernel did not properly handle TCP packets with the URG flag. A remote attacker could use this to cause a denial of service.

Notes

Author	Note
jdstrand	android kernels (flo, goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 14.10 and earlier preview kernels linux-lts-saucy no longer receives official support linux-lts-quantal no longer receives official support

Author

Note

jdstrand

android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.10 and earlier preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support

Priority

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	precise	Ignored (end of life)
	trusty	Released (3.13.0-132.181)
	xenial	Released (4.4.0-75.96)
	yakkety	Ignored (end of life)
	zesty	Not vulnerable (4.10.0-8.10)
	artful	Not vulnerable (4.10.0-19.21)
	Patches: Introduced by 9c55e01c0cc835818475a6ce8c4d684df9949ac8 Fixed by ccf7abb93af09ad0868ae9033d1ca8108bdaec82
linux-ti-omap4 Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	precise	Ignored (end of life)
	trusty	Does not exist
	artful	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-linaro-omap Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Ignored (end of life)
	trusty	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-linaro-shared Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Ignored (end of life)
	trusty	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-linaro-vexpress Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Ignored (end of life)
	trusty	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-qcm-msm Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Ignored (end of life)
	trusty	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-armadaxp Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Ignored (end of life)
	trusty	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-lts-quantal Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Ignored (end of life)
	trusty	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-lts-raring Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Ignored (end of life)
	trusty	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-lts-saucy Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Ignored (end of life)
	trusty	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Ignored (end of life)
	trusty	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-goldfish Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	xenial	Ignored (abandoned)
	yakkety	Ignored (end of life)
	zesty	Ignored (end of life)
linux-grouper Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-mako Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	xenial	Ignored (abandoned)
	yakkety	Ignored (end of life)
	zesty	Does not exist
linux-manta Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-flo Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	xenial	Ignored (abandoned)
	yakkety	Ignored (end of life)
	zesty	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Not vulnerable (4.10.0-1004.6)
	precise	Does not exist
	trusty	Does not exist
	xenial	Released (4.4.0-1054.61)
	yakkety	Ignored (end of life)
	zesty	Not vulnerable (4.10.0-1001.3)
linux-lts-utopic Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Does not exist
	trusty	Ignored (end of life, was needed)
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Does not exist
	trusty	Released (4.4.0-75.96~14.04.1)
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-snapdragon Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Not vulnerable (4.4.0-1057.61)
	precise	Does not exist
	trusty	Does not exist
	xenial	Released (4.4.0-1057.61)
	yakkety	Released (4.4.0-1057.61)
	zesty	Released (4.4.0-1057.61)
linux-aws Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Does not exist
	trusty	Not vulnerable (4.4.0-1002.2)
	xenial	Released (4.4.0-1016.25)
	yakkety	Does not exist
	zesty	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	xenial	Released (4.10.0-27.30~16.04.2)
	yakkety	Does not exist
	zesty	Does not exist
linux-hwe-edge Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	xenial	Released (4.10.0-27.30~16.04.2)
	yakkety	Does not exist
	zesty	Does not exist
linux-gke Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	xenial	Released (4.4.0-1012.12)
	yakkety	Does not exist
	zesty	Does not exist
linux-azure Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	trusty	Not vulnerable (4.15.0-1023.24~14.04.1)
	xenial	Not vulnerable (4.11.0-1009.9)
	yakkety	Does not exist
	zesty	Does not exist
linux-gcp Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	trusty	Does not exist
	xenial	Not vulnerable (4.10.0-1004.4)
	yakkety	Does not exist
	zesty	Does not exist
linux-kvm Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	trusty	Does not exist
	xenial	Not vulnerable (4.4.0-1004.9)
	zesty	Does not exist
linux-euclid Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	trusty	Does not exist
	xenial	Ignored (was needed ESM criteria)
	zesty	Does not exist
linux-oem Launchpad, Ubuntu, Debian	upstream	Released (4.10~rc8)
	artful	Does not exist
	trusty	Does not exist
	xenial	Not vulnerable (4.13.0-1008.9)
	zesty	Does not exist

Severity score breakdown

Parameter	Value
Base score	7.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

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