CVE-2017-17450

Published: 6 December 2017

net/netfilter/xt_osf.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN capability for add_callback and remove_callback operations, which allows local users to bypass intended access restrictions because the xt_osf_fingers data structure is shared across all net namespaces.

From the Ubuntu Security Team

It was discovered that the netfilter passive OS fingerprinting (xt_osf) module did not properly perform access control checks. A local attacker could improperly modify the system-wide OS fingerprint list.

Priority

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	artful	Released (4.13.0-38.43)
	bionic	Not vulnerable (4.15.0-10.11)
	precise	Ignored (was needs-triage ESM criteria)
	trusty	Released (3.13.0-142.191)
	upstream	Released (4.15~rc4)
	xenial	Released (4.4.0-119.143)
	zesty	Ignored (reached end-of-life)
	Patches: Introduced by 11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 Fixed by 916a27901de01446bcf57ecca4783f6cff493309
linux-armadaxp Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	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
	bionic	Not vulnerable (4.15.0-1001.1)
	precise	Does not exist
	trusty	Released (4.4.0-1016.16)
	upstream	Released (4.15~rc4)
	xenial	Released (4.4.0-1054.63)
	zesty	Does not exist
linux-azure Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable (4.15.0-1002.2)
	precise	Does not exist
	trusty	Not vulnerable (4.15.0-1023.24~14.04.1)
	upstream	Released (4.15~rc4)
	xenial	Released (4.13.0-1014.17)
	zesty	Does not exist
linux-euclid Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Ignored (was needs-triage ESM criteria)
	zesty	Does not exist
linux-flo Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc4)
	xenial	Ignored (abandoned)
	zesty	Does not exist
linux-gcp Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable (4.15.0-1001.1)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Released (4.13.0-1012.16)
	zesty	Does not exist
linux-gke Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Ignored (was needed now end-of-life)
	zesty	Does not exist
linux-goldfish Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc4)
	xenial	Ignored (was needed now end-of-life)
	zesty	Ignored (reached end-of-life)
linux-grouper Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc4)
	xenial	Does not exist
	zesty	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Released (4.13.0-38.43~16.04.1)
	zesty	Does not exist
linux-hwe-edge Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Released (4.18.0-8.9~18.04.1)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Released (4.13.0-38.43~16.04.1)
	zesty	Does not exist
linux-kvm Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable (4.15.0-1002.2)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Released (4.4.0-1020.25)
	zesty	Does not exist
linux-linaro-omap Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Does not exist
	zesty	Does not exist
linux-linaro-shared Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Does not exist
	zesty	Does not exist
linux-linaro-vexpress Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Does not exist
	zesty	Does not exist
linux-lts-quantal Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Ignored (end-of-life)
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	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
	bionic	Does not exist
	precise	Ignored (end-of-life)
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Does not exist
	zesty	Does not exist
linux-lts-saucy Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Ignored (end-of-life)
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	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
	bionic	Does not exist
	precise	Released (3.13.0-142.191~precise1)
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Does not exist
	zesty	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [out of standard support])
	upstream	Released (4.15~rc4)
	xenial	Does not exist
	zesty	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [was needs-triage now end-of-life])
	upstream	Released (4.15~rc4)
	xenial	Does not exist
	zesty	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [out of standard support])
	upstream	Released (4.15~rc4)
	xenial	Does not exist
	zesty	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Released (4.4.0-119.143~14.04.1)
	upstream	Released (4.15~rc4)
	xenial	Does not exist
	zesty	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc4)
	xenial	Does not exist
	zesty	Does not exist
linux-mako Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc4)
	xenial	Ignored (abandoned)
	zesty	Does not exist
linux-manta Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc4)
	xenial	Does not exist
	zesty	Does not exist
linux-oem Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable (4.15.0-1002.3)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Released (4.13.0-1022.24)
	zesty	Does not exist
linux-qcm-msm Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Does not exist
	zesty	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	artful	Released (4.13.0-1016.17)
	bionic	Not vulnerable (4.15.0-1006.7)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Released (4.4.0-1086.94)
	zesty	Ignored (reached end-of-life)
linux-snapdragon Launchpad, Ubuntu, Debian	artful	Released (4.4.0-1088.93)
	bionic	Not vulnerable
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	xenial	Released (4.4.0-1088.93)
	zesty	Ignored (reached end-of-life)
linux-ti-omap4 Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc4)
	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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