CVE-2018-8822

Published: 20 March 2018

Incorrect buffer length handling in the ncp_read_kernel function in fs/ncpfs/ncplib_kernel.c in the Linux kernel through 4.15.11, and in drivers/staging/ncpfs/ncplib_kernel.c in the Linux kernel 4.16-rc through 4.16-rc6, could be exploited by malicious NCPFS servers to crash the kernel or execute code.

From the Ubuntu Security Team

Silvio Cesare discovered a buffer overwrite existed in the NCPFS implementation in the Linux kernel. A remote attacker controlling a malicious NCPFS server could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Priority

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc7)
	bionic	Not vulnerable (4.15.0-15.16)
	artful	Released (4.13.0-43.48)
	trusty	Released (3.13.0-149.199)
	xenial	Released (4.4.0-127.153)
	Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Fixed by 4c41aa24baa4ed338241d05494f2c595c885af8f
linux-goldfish Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc7)
	bionic	Does not exist
	artful	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Ignored (end of life, was needed)
linux-grouper Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc7)
	bionic	Does not exist
	artful	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Does not exist
linux-flo Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc7)
	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~rc7)
	bionic	Not vulnerable (4.15.0-1003.3)
	artful	Does not exist
	trusty	Released (4.4.0-1022.22)
	xenial	Released (4.4.0-1060.69)
linux-hwe Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc7)
	bionic	Not vulnerable
	artful	Does not exist
	trusty	Does not exist
	xenial	Released (4.13.0-43.48~16.04.1)
linux-gke Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc7)
	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~rc7)
	bionic	Not vulnerable (4.15.0-1004.4)
	artful	Does not exist
	trusty	Not vulnerable (4.15.0-1023.24~14.04.1)
	xenial	Released (4.13.0-1018.21)
linux-gcp Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc7)
	bionic	Not vulnerable (4.15.0-1003.3)
	artful	Does not exist
	trusty	Does not exist
	xenial	Released (4.13.0-1017.21)
linux-kvm Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc7)
	bionic	Not vulnerable (4.15.0-1004.4)
	artful	Does not exist
	trusty	Does not exist
	xenial	Released (4.4.0-1026.31)
linux-euclid Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc7)
	bionic	Does not exist
	artful	Does not exist
	trusty	Does not exist
	xenial	Ignored (was needs-triage ESM criteria)
linux-oem Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc7)
	bionic	Not vulnerable (4.15.0-1002.3)
	artful	Does not exist
	trusty	Does not exist
	xenial	Released (4.13.0-1028.31)
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~rc7)
	xenial	Released (4.13.0-43.48~16.04.1)
linux-lts-trusty Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.16~rc7)
	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~rc7)
	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~rc7)
	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~rc7)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Released (4.4.0-127.153~14.04.1)
	upstream	Released (4.16~rc7)
	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~rc7)
	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~rc7)
	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~rc7)
	xenial	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	artful	Released (4.13.0-1020.21)
	bionic	Not vulnerable (4.15.0-1006.7)
	trusty	Does not exist
	upstream	Released (4.16~rc7)
	xenial	Released (4.4.0-1090.98)
linux-snapdragon Launchpad, Ubuntu, Debian	artful	Released (4.4.0-1093.98)
	bionic	Not vulnerable
	trusty	Does not exist
	upstream	Released (4.16~rc7)
	xenial	Released (4.4.0-1093.98)

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

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