CVE-2017-7184

Published: 19 March 2017

The xfrm_replay_verify_len function in net/xfrm/xfrm_user.c in the Linux kernel through 4.10.6 does not validate certain size data after an XFRM_MSG_NEWAE update, which allows local users to obtain root privileges or cause a denial of service (heap-based out-of-bounds access) by leveraging the CAP_NET_ADMIN capability, as demonstrated during a Pwn2Own competition at CanSecWest 2017 for the Ubuntu 16.10 linux-image-* package 4.8.0.41.52.

From the Ubuntu Security Team

It was discovered that the xfrm framework for transforming packets in the Linux kernel did not properly validate data received from user space. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code with administrative privileges.

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

7.8

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	precise	Released (3.2.0-125.168)
	trusty	Released (3.13.0-115.162)
	xenial	Released (4.4.0-71.92)
	yakkety	Released (4.8.0-45.48)
	zesty	Not vulnerable (4.10.0-19.21)
	artful	Not vulnerable (4.10.0-19.21)
	Patches: Introduced by d51d081d65048a7a6f9956a7809c3bb504f3b95d Fixed by 677e806da4d916052585301785d847c3b3e6186a Introduced by d51d081d65048a7a6f9956a7809c3bb504f3b95d Fixed by f843ee6dd019bcece3e74e76ad9df0155655d0df
linux-armadaxp Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	artful	Does not exist
	precise	Released (3.2.0-1686.113)
	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-flo Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	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-goldfish Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	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 (4.11~rc5)
	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-linaro-omap Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	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 (4.11~rc5)
	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 (4.11~rc5)
	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-quantal Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	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 (4.11~rc5)
	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 (4.11~rc5)
	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 (4.11~rc5)
	artful	Does not exist
	precise	Released (3.13.0-115.162~precise1)
	trusty	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	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 (4.11~rc5)
	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 (4.11~rc5)
	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-aws Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	artful	Does not exist
	precise	Does not exist
	trusty	Not vulnerable (4.4.0-1002.2)
	xenial	Released (4.4.0-1012.21)
	yakkety	Does not exist
	zesty	Does not exist
linux-azure Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	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-euclid Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	artful	Does not exist
	trusty	Does not exist
	xenial	Not vulnerable (4.4.0-9019.20)
	zesty	Does not exist
linux-gcp Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	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-gke Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	xenial	Released (4.4.0-1009.9)
	yakkety	Does not exist
	zesty	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	xenial	Released (4.8.0-45.48~16.04.1)
	yakkety	Does not exist
	zesty	Does not exist
linux-hwe-edge Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	xenial	Released (4.8.0-45.48~16.04.1)
	yakkety	Does not exist
	zesty	Does not exist
linux-kvm Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	artful	Does not exist
	trusty	Does not exist
	xenial	Not vulnerable (4.4.0-1004.9)
	zesty	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	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 (4.11~rc5)
	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 (4.11~rc5)
	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 (4.11~rc5)
	artful	Does not exist
	precise	Does not exist
	trusty	Released (4.4.0-71.92~14.04.1)
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-oem Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	artful	Does not exist
	trusty	Does not exist
	xenial	Not vulnerable (4.13.0-1008.9)
	zesty	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	artful	Not vulnerable (4.10.0-1004.6)
	precise	Does not exist
	trusty	Does not exist
	xenial	Released (4.4.0-1051.58)
	yakkety	Released (4.8.0-1032.35)
	zesty	Not vulnerable (4.10.0-1003.5)
linux-snapdragon Launchpad, Ubuntu, Debian	upstream	Released (4.11~rc5)
	artful	Not vulnerable (4.4.0-1055.59)
	precise	Does not exist
	trusty	Does not exist
	xenial	Released (4.4.0-1054.58)
	yakkety	Released (4.4.0-1055.59)
	zesty	Released (4.4.0-1055.59)
linux-qcm-msm Launchpad, Ubuntu, Debian	trusty	Does not exist
	artful	Does not exist
	precise	Ignored (end of life)
	upstream	Released (4.11~rc5)
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-ti-omap4 Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Released (3.2.0-1503.130)
	trusty	Does not exist
	upstream	Released (4.11~rc5)
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist

Severity score breakdown

Parameter	Value
Base score	7.8
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

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