CVE-2016-1583

Published: 8 June 2016

The ecryptfs_privileged_open function in fs/ecryptfs/kthread.c in the Linux kernel before 4.6.3 allows local users to gain privileges or cause a denial of service (stack memory consumption) via vectors involving crafted mmap calls for /proc pathnames, leading to recursive pagefault handling.

From the Ubuntu Security Team

Jann Horn discovered that eCryptfs improperly attempted to use the mmap() handler of a lower filesystem that did not implement one, causing a recursive page fault to occur. A local unprivileged attacker could use to cause a denial of service (system crash) or possibly 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	precise	Released (3.2.0-104.145)
	trusty	Released (3.13.0-88.135)
	upstream	Released (4.7~rc3)
	wily	Released (4.2.0-38.45)
	xenial	Released (4.4.0-24.43)
	yakkety	Not vulnerable (4.4.0-24.43)
	zesty	Not vulnerable (4.8.0-22.24)
	Patches: Introduced by 237fead619984cc48818fe12ee0ceada3f55b012 Fixed by e54ad7f1ee263ffa5a2de9c609d58dfa27b21cd9 Introduced by 746f1e558bc52b9693c1a1ecdab60f8392e5ff18 Fixed by 2f36db71009304b3f0b95afacd8eba1f9f046b87 Introduced by 0d9e26329b0c9263d4d9e0422d80a0e73268c52f Fixed by 29d6455178a09e1dc340380c582b13356227e8df
linux-armadaxp Launchpad, Ubuntu, Debian	precise	Released (3.2.0-1667.92)
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	wily	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-aws Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Not vulnerable (4.4.0-1002.2)
	upstream	Released (4.7~rc3)
	xenial	Not vulnerable (4.4.0-1001.10)
	yakkety	Does not exist
	zesty	Does not exist
linux-flo Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (4.7~rc3)
	wily	Ignored (end of life)
	xenial	Ignored (abandoned)
	yakkety	Ignored (end of life)
	zesty	Does not exist
linux-gke Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	xenial	Not vulnerable (4.4.0-1003.3)
	yakkety	Does not exist
	zesty	Does not exist
linux-goldfish Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (4.7~rc3)
	wily	Ignored (end of life)
	xenial	Ignored (abandoned)
	yakkety	Ignored (end of life)
	zesty	Ignored (end of life)
linux-grouper Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (4.7~rc3)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	xenial	Not vulnerable (4.8.0-36.36~16.04.1)
	yakkety	Does not exist
	zesty	Does not exist
linux-hwe-edge Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	xenial	Not vulnerable (4.8.0-36.36~16.04.1)
	yakkety	Does not exist
	zesty	Does not exist
linux-linaro-omap Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-linaro-shared Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-linaro-vexpress Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-lts-quantal Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	wily	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	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-lts-saucy Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	wily	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	precise	Released (3.13.0-88.135~precise1)
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Released (3.16.0-73.95~14.04.1)
	upstream	Released (4.7~rc3)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Released (3.19.0-61.69~14.04.1)
	upstream	Released (4.7~rc3)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Released (4.2.0-38.45~14.04.1)
	upstream	Released (4.7~rc3)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Released (4.4.0-24.43~14.04.1)
	upstream	Released (4.7~rc3)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (4.7~rc3)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-mako Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (4.7~rc3)
	wily	Ignored (end of life)
	xenial	Ignored (abandoned)
	yakkety	Ignored (end of life)
	zesty	Does not exist
linux-manta Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (4.7~rc3)
	wily	Ignored (end of life)
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-qcm-msm Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	wily	Released (4.2.0-1031.41)
	xenial	Released (4.4.0-1012.16)
	yakkety	Not vulnerable (4.4.0-1012.16)
	zesty	Not vulnerable (4.8.0-1013.15)
linux-snapdragon Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	wily	Does not exist
	xenial	Released (4.4.0-1015.18)
	yakkety	Not vulnerable (4.4.0-1015.18)
	zesty	Not vulnerable (4.4.0-1029.32)
linux-ti-omap4 Launchpad, Ubuntu, Debian	precise	Released (3.2.0-1482.109)
	trusty	Does not exist
	upstream	Released (4.7~rc3)
	wily	Does not exist
	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

Bugs

https://bugs.launchpad.net/bugs/1588871

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