CVE-2017-17863

Published: 27 December 2017

kernel/bpf/verifier.c in the Linux kernel 4.9.x through 4.9.71 does not check the relationship between pointer values and the BPF stack, which allows local users to cause a denial of service (integer overflow or invalid memory access) or possibly have unspecified other impact.

From the Ubuntu Security Team

Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel did not properly check the relationship between pointer values and the BPF stack. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Notes

Author	Note
tyhicks	This addresses an issue in the 4.9 stable tree

Priority

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	artful	Not vulnerable
	precise	Not vulnerable
	trusty	Not vulnerable
	upstream	Not vulnerable
	xenial	Not vulnerable
	zesty	Not vulnerable
	Patches: Introduced by 7bca0a9702edfc8d0e7e46f984ca422ffdbe0498 Fixed by 37435f7e80ef9adc32a69013c18f135e3f434244
linux-armadaxp Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-aws Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Not vulnerable
	upstream	Not vulnerable
	xenial	Not vulnerable
	zesty	Does not exist
linux-azure Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Not vulnerable
	upstream	Not vulnerable
	xenial	Not vulnerable
	zesty	Does not exist
linux-euclid Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Not vulnerable
	zesty	Does not exist
linux-flo Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Not vulnerable
	xenial	Ignored (abandoned)
	zesty	Does not exist
linux-gcp Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Not vulnerable
	zesty	Does not exist
linux-gke Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Not vulnerable
	zesty	Does not exist
linux-goldfish Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Not vulnerable
	xenial	Not vulnerable
	zesty	Not vulnerable
linux-grouper Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Not vulnerable
	zesty	Does not exist
linux-hwe-edge Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Not vulnerable
	zesty	Does not exist
linux-kvm Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Not vulnerable
	zesty	Does not exist
linux-linaro-omap Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
linux-linaro-shared Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
linux-linaro-vexpress Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
linux-lts-quantal Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Ignored (end-of-life)
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-lts-raring Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Ignored (end-of-life)
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
linux-lts-saucy Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Ignored (end-of-life)
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Not vulnerable
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [out of standard support])
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [was needs-triage now end-of-life])
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [out of standard support])
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Not vulnerable
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
linux-mako Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Not vulnerable
	xenial	Ignored (abandoned)
	zesty	Does not exist
linux-manta Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
linux-oem Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Not vulnerable
	zesty	Does not exist
linux-qcm-msm Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Does not exist
	zesty	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	artful	Not vulnerable
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Not vulnerable
	zesty	Not vulnerable
linux-snapdragon Launchpad, Ubuntu, Debian	artful	Not vulnerable
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	Not vulnerable
	zesty	Not vulnerable
linux-ti-omap4 Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Not vulnerable
	xenial	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:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

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