CVE-2018-1130

Published: 10 May 2018

Linux kernel before version 4.16-rc7 is vulnerable to a null pointer dereference in dccp_write_xmit() function in net/dccp/output.c in that allows a local user to cause a denial of service by a number of certain crafted system calls.

From the Ubuntu Security Team

It was discovered that a null pointer dereference vulnerability existed in the DCCP protocol implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash).

Notes

Author	Note
sbeattie	Introduced in fix for CVE-2017-8824

Mitigation

Blacklist the dccp ipv[46] autoloading aliases by adding the following
lines to /etc/modprobe.d/blacklist-dccp.conf:
  alias net-pf-2-proto-0-type-6 off
  alias net-pf-2-proto-33-type-6 off
  alias net-pf-10-proto-0-type-6 off
  alias net-pf-10-proto-33-type-6 off

Priority

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	trusty	Released (3.13.0-153.203)
	xenial	Released (4.4.0-127.153)
	artful	Released (4.13.0-46.51)
	bionic	Not vulnerable (4.15.0-15.16)
	upstream	Released (4.16~rc7)
	Patches: Introduced by 69c64866ce072dea1d1e59a0d61e0f66c0dffb76 Fixed by 67f93df79aeefc3add4e4b31a752600f834236e2
linux-lts-trusty Launchpad, Ubuntu, Debian	trusty	Does not exist
	xenial	Does not exist
	artful	Does not exist
	bionic	Does not exist
	upstream	Released (4.16~rc7)
linux-goldfish Launchpad, Ubuntu, Debian	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Ignored (end of life, was needs-triage)
	artful	Does not exist
	bionic	Does not exist
	upstream	Released (4.16~rc7)
linux-grouper Launchpad, Ubuntu, Debian	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Does not exist
	artful	Does not exist
	upstream	Released (4.16~rc7)
	bionic	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Does not exist
	artful	Does not exist
	bionic	Does not exist
	upstream	Released (4.16~rc7)
linux-mako Launchpad, Ubuntu, Debian	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Ignored (abandoned)
	artful	Does not exist
	bionic	Does not exist
	upstream	Released (4.16~rc7)
linux-flo Launchpad, Ubuntu, Debian	trusty	Does not exist (trusty was ignored [abandoned])
	artful	Does not exist
	upstream	Released (4.16~rc7)
	bionic	Does not exist
	xenial	Ignored (abandoned)
linux-aws Launchpad, Ubuntu, Debian	trusty	Released (4.4.0-1022.22)
	xenial	Released (4.4.0-1060.69)
	artful	Does not exist
	upstream	Released (4.16~rc7)
	bionic	Not vulnerable (4.15.0-1003.3)
linux-azure Launchpad, Ubuntu, Debian	trusty	Not vulnerable (4.15.0-1023.24~14.04.1)
	xenial	Released (4.15.0-1013.13~16.04.2)
	artful	Does not exist
	upstream	Released (4.16~rc7)
	bionic	Not vulnerable (4.15.0-1004.4)
linux-euclid Launchpad, Ubuntu, Debian	trusty	Does not exist
	xenial	Ignored (was needed ESM criteria)
	artful	Does not exist
	upstream	Released (4.16~rc7)
	bionic	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	upstream	Released (4.16~rc7)
	bionic	Not vulnerable
	artful	Does not exist
	trusty	Does not exist
	xenial	Released (4.15.0-24.26~16.04.1)
linux-hwe-edge Launchpad, Ubuntu, Debian	bionic	Released (4.18.0-8.9~18.04.1)
	artful	Does not exist
	trusty	Does not exist
	upstream	Released (4.16~rc7)
	xenial	Released (4.15.0-24.26~16.04.1)
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 needs-triage)
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 (4.15.0-1014.14~16.04.1)
linux-kvm Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1004.4)
	artful	Does not exist
	trusty	Does not exist
	upstream	Released (4.16~rc7)
	xenial	Released (4.4.0-1026.31)
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	Does not exist (trusty was ignored [end of standard support])
	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-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-oem Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable (4.15.0-1002.3)
	trusty	Does not exist
	upstream	Released (4.16~rc7)
	xenial	Released (4.13.0-1031.35)
linux-raspi2 Launchpad, Ubuntu, Debian	artful	Released (4.13.0-1023.24)
	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	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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