CVE-2014-8134

Published: 8 December 2014

The paravirt_ops_setup function in arch/x86/kernel/kvm.c in the Linux kernel through 3.18 uses an improper paravirt_enabled setting for KVM guest kernels, which makes it easier for guest OS users to bypass the ASLR protection mechanism via a crafted application that reads a 16-bit value.

From the Ubuntu Security Team

An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel.

Notes

Author	Note
jdstrand	android kernels (flo, goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 14.04 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 14.04 preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support

Priority

Cvss 3 Severity Score

3.3

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	upstream	Released (3.19~rc1)
	lucid	Released (2.6.32-70.137)
	precise	Released (3.2.0-74.109)
	trusty	Released (3.13.0-43.72)
	utopic	Released (3.16.0-28.37)
	vivid	Not vulnerable (3.16.0-28.38)
	wily	Not vulnerable (3.19.0-15.15)
	xenial	Not vulnerable (4.2.0-16.19)
	yakkety	Not vulnerable (4.4.0-21.37)
	zesty	Not vulnerable (4.8.0-22.24)
	Patches: Introduced by 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7 Fixed by 29fa6825463c97e5157284db80107d1bfac5d77b
linux-armadaxp Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Released (3.2.0-1642.61)
	trusty	Does not exist
	upstream	Released (3.19~rc1)
	utopic	Does not exist
	vivid	Does not exist
	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 (3.19~rc1)
	xenial	Not vulnerable (4.4.0-1001.10)
	yakkety	Does not exist
	zesty	Does not exist
linux-ec2 Launchpad, Ubuntu, Debian	upstream	Released (3.19~rc1)
	lucid	Released (2.6.32-374.91)
	precise	Does not exist
	trusty	Does not exist
	utopic	Does not exist
	vivid	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-flo Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (3.19~rc1)
	utopic	Ignored (end of life)
	vivid	Ignored (end of life)
	wily	Ignored (end of life)
	xenial	Ignored (abandoned)
	yakkety	Ignored (end of life)
	zesty	Does not exist
linux-fsl-imx51 Launchpad, Ubuntu, Debian	upstream	Released (3.19~rc1)
	lucid	Ignored (end of life)
	precise	Does not exist
	trusty	Does not exist
	utopic	Does not exist
	vivid	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-gke Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	upstream	Released (3.19~rc1)
	xenial	Not vulnerable (4.4.0-1003.3)
	yakkety	Does not exist
	zesty	Does not exist
linux-goldfish Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (3.19~rc1)
	utopic	Ignored (end of life)
	vivid	Ignored (end of life)
	wily	Ignored (end of life)
	xenial	Ignored (abandoned)
	yakkety	Ignored (end of life)
	zesty	Ignored (end of life)
linux-grouper Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (3.19~rc1)
	utopic	Ignored (end of life)
	vivid	Does not exist
	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 (3.19~rc1)
	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 (3.19~rc1)
	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	lucid	Does not exist
	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (3.19~rc1)
	utopic	Does not exist
	vivid	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-linaro-shared Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (3.19~rc1)
	utopic	Does not exist
	vivid	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-linaro-vexpress Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (3.19~rc1)
	utopic	Does not exist
	vivid	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-lts-quantal Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Ignored (end of life, was pending)
	trusty	Does not exist
	upstream	Released (3.19~rc1)
	utopic	Does not exist
	vivid	Does not exist
	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	lucid	Does not exist
	precise	Ignored (end of life, was needs-triage)
	trusty	Does not exist
	upstream	Released (3.19~rc1)
	utopic	Does not exist
	vivid	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-lts-saucy Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Ignored (end of life, was pending)
	trusty	Does not exist
	upstream	Released (3.19~rc1)
	utopic	Does not exist
	vivid	Does not exist
	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	lucid	Does not exist
	precise	Released (3.13.0-43.72~precise1)
	trusty	Does not exist
	upstream	Released (3.19~rc1)
	utopic	Does not exist
	vivid	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Does not exist
	trusty	Released (3.16.0-28.37~14.04.1)
	upstream	Released (3.19~rc1)
	utopic	Does not exist
	vivid	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was not-affected [3.19.0-18.18~14.04.1])
	upstream	Released (3.19~rc1)
	utopic	Does not exist
	vivid	Does not exist
	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	Does not exist (trusty was not-affected [4.2.0-18.22~14.04.1])
	upstream	Released (3.19~rc1)
	vivid	Does not exist
	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	Not vulnerable (4.4.0-13.29~14.04.1)
	upstream	Released (3.19~rc1)
	vivid	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (3.19~rc1)
	utopic	Does not exist
	vivid	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-mako Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (3.19~rc1)
	utopic	Ignored (end of life)
	vivid	Ignored (end of life)
	wily	Ignored (end of life)
	xenial	Ignored (abandoned)
	yakkety	Ignored (end of life)
	zesty	Does not exist
linux-manta Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (3.19~rc1)
	utopic	Ignored (end of life)
	vivid	Ignored (end of life)
	wily	Ignored (end of life)
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist
linux-mvl-dove Launchpad, Ubuntu, Debian	upstream	Released (3.19~rc1)
	yakkety	Does not exist
	zesty	Does not exist
	lucid	Ignored (end of life)
	precise	Does not exist
	trusty	Does not exist
	utopic	Does not exist
	vivid	Does not exist
	wily	Does not exist
	xenial	Does not exist
linux-qcm-msm Launchpad, Ubuntu, Debian	lucid	Ignored (end of life)
	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (3.19~rc1)
	utopic	Does not exist
	vivid	Does not exist
	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 (3.19~rc1)
	vivid	Does not exist
	wily	Not vulnerable (4.2.0-1008.12)
	xenial	Not vulnerable (4.2.0-1013.19)
	yakkety	Not vulnerable (4.4.0-1009.10)
	zesty	Not vulnerable (4.8.0-1013.15)
linux-snapdragon Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	upstream	Released (3.19~rc1)
	wily	Does not exist
	xenial	Not vulnerable (4.4.0-1012.12)
	yakkety	Not vulnerable (4.4.0-1012.12)
	zesty	Not vulnerable (4.4.0-1029.32)
linux-ti-omap4 Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Released (3.2.0-1458.78)
	trusty	Does not exist
	upstream	Released (3.19~rc1)
	utopic	Does not exist
	vivid	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	zesty	Does not exist

Severity score breakdown

Parameter	Value
Base score	3.3
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	Low
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

References

Bugs

https://launchpad.net/bugs/1400314

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