CVE-2018-8043

Published: 10 March 2018

The unimac_mdio_probe function in drivers/net/phy/mdio-bcm-unimac.c in the Linux kernel through 4.15.8 does not validate certain resource availability, which allows local users to cause a denial of service (NULL pointer dereference).

From the Ubuntu Security Team

It was discovered that the Broadcom UniMAC MDIO bus controller driver in the Linux kernel did not properly validate device resources. A local attacker could use this to cause a denial of service (system crash).

Priority

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc1)
	bionic	Not vulnerable (4.15.0-13.14)
	trusty	Not vulnerable
	xenial	Released (4.4.0-119.143)
	artful	Released (4.13.0-39.44)
	Patches: Introduced by 2ba1b163c9d5d716fb1061f3fb76832cc6eea37f Fixed by 297a6961ffb8ff4dc66c9fbf53b924bd1dda05d5
linux-armadaxp Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc1)
	bionic	Does not exist
	trusty	Does not exist
	xenial	Does not exist
	artful	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-goldfish Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc1)
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Not vulnerable
	artful	Does not exist
linux-grouper Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc1)
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Does not exist
	artful	Does not exist
linux-flo Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc1)
	bionic	Does not exist
	artful	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Ignored (abandoned)
linux-aws Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc1)
	bionic	Not vulnerable (4.15.0-1003.3)
	artful	Does not exist
	trusty	Released (4.4.0-1016.16)
	xenial	Released (4.4.0-1054.63)
linux-hwe Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc1)
	bionic	Not vulnerable
	artful	Does not exist
	trusty	Does not exist
	xenial	Released (4.13.0-39.44~16.04.1)
linux-gke Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc1)
	bionic	Does not exist
	artful	Does not exist
	trusty	Does not exist
	xenial	Ignored (end of standard support, was needed)
linux-azure Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc1)
	bionic	Not vulnerable (4.15.0-1003.3)
	artful	Does not exist
	trusty	Not vulnerable (4.15.0-1023.24~14.04.1)
	xenial	Released (4.13.0-1014.17)
linux-gcp Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc1)
	bionic	Not vulnerable (4.15.0-1003.3)
	artful	Does not exist
	trusty	Does not exist
	xenial	Released (4.13.0-1013.17)
linux-euclid Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc1)
	bionic	Does not exist
	artful	Does not exist
	trusty	Does not exist
	xenial	Ignored (was needed ESM criteria)
linux-linaro-omap Launchpad, Ubuntu, Debian	trusty	Does not exist
	xenial	Does not exist
	artful	Does not exist
	bionic	Does not exist
	upstream	Released (4.16~rc1)
linux-linaro-shared Launchpad, Ubuntu, Debian	trusty	Does not exist
	xenial	Does not exist
	artful	Does not exist
	bionic	Does not exist
	upstream	Released (4.16~rc1)
linux-linaro-vexpress Launchpad, Ubuntu, Debian	trusty	Does not exist
	xenial	Does not exist
	artful	Does not exist
	bionic	Does not exist
	upstream	Released (4.16~rc1)
linux-lts-quantal Launchpad, Ubuntu, Debian	trusty	Does not exist
	xenial	Does not exist
	artful	Does not exist
	bionic	Does not exist
	upstream	Released (4.16~rc1)
	This package is not directly supported by the Ubuntu Security Team
linux-lts-raring Launchpad, Ubuntu, Debian	trusty	Does not exist
	xenial	Does not exist
	artful	Does not exist
	bionic	Does not exist
	upstream	Released (4.16~rc1)
linux-lts-saucy Launchpad, Ubuntu, Debian	trusty	Does not exist
	artful	Does not exist
	bionic	Does not exist
	upstream	Released (4.16~rc1)
	xenial	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-hwe-edge Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Released (4.18.0-8.9~18.04.1)
	trusty	Does not exist
	upstream	Released (4.16~rc1)
	xenial	Released (4.13.0-39.44~16.04.1)
linux-kvm Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable (4.15.0-1003.3)
	trusty	Does not exist
	upstream	Released (4.16~rc1)
	xenial	Released (4.4.0-1021.26)
linux-lts-trusty Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.16~rc1)
	xenial	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	upstream	Released (4.16~rc1)
	xenial	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Ignored (end of life, was needs-triage)
	upstream	Released (4.16~rc1)
	xenial	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	upstream	Released (4.16~rc1)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Released (4.4.0-119.143~14.04.1)
	upstream	Released (4.16~rc1)
	xenial	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.16~rc1)
	xenial	Does not exist
linux-mako Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.16~rc1)
	xenial	Ignored (abandoned)
linux-manta Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.16~rc1)
	xenial	Does not exist
linux-oem Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable (4.15.0-1002.3)
	trusty	Does not exist
	upstream	Released (4.16~rc1)
	xenial	Released (4.13.0-1024.27)
linux-qcm-msm Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.16~rc1)
	xenial	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	artful	Released (4.13.0-1017.18)
	bionic	Not vulnerable (4.15.0-1006.7)
	trusty	Does not exist
	upstream	Released (4.16~rc1)
	xenial	Released (4.4.0-1087.95)
linux-snapdragon Launchpad, Ubuntu, Debian	artful	Released (4.4.0-1090.95)
	bionic	Not vulnerable
	trusty	Does not exist
	upstream	Released (4.16~rc1)
	xenial	Released (4.4.0-1090.95)
linux-ti-omap4 Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.16~rc1)
	xenial	Does not exist

Severity score breakdown

Parameter	Value
Base score	5.5
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

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