CVE-2017-12193

Published: 22 November 2017

The assoc_array_insert_into_terminal_node function in lib/assoc_array.c in the Linux kernel before 4.13.11 mishandles node splitting, which allows local users to cause a denial of service (NULL pointer dereference and panic) via a crafted application, as demonstrated by the keyring key type, and key addition and link creation operations.

From the Ubuntu Security Team

Fan Wu, Haoran Qiu, and Shixiong Zhao discovered that the associative array implementation in the Linux kernel sometimes did not properly handle adding a new entry. 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	artful	Released (4.13.0-19.22)
	trusty	Released (3.13.0-153.203)
	xenial	Released (4.4.0-103.126)
	zesty	Ignored (end of life)
	upstream	Released (4.14~rc7)
	bionic	Not vulnerable (4.13.0-25.29)
	Patches: Introduced by 3cb989501c2688cacbb7dc4b0d353faf838f53a1 Fixed by ea6789980fdaa610d7eb63602c746bf6ec70cd2b
linux-armadaxp Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-aws Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Released (4.4.0-1005.5)
	xenial	Released (4.4.0-1043.52)
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Not vulnerable (4.15.0-1001.1)
linux-azure Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Not vulnerable (4.15.0-1023.24~14.04.1)
	xenial	Released (4.13.0-1005.7)
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Not vulnerable (4.15.0-1002.2)
linux-euclid Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Ignored (was needed ESM criteria)
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-flo Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Ignored (abandoned)
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-gcp Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Released (4.13.0-1002.5)
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Not vulnerable (4.15.0-1001.1)
linux-gke Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Ignored (end of standard support, was pending)
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-goldfish Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Not vulnerable
	zesty	Not vulnerable
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-grouper Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Released (4.13.0-26.29~16.04.2)
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Not vulnerable
linux-hwe-edge Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Released (4.13.0-26.29~16.04.2)
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Released (4.18.0-8.9~18.04.1)
linux-kvm Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Released (4.4.0-1012.17)
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Not vulnerable (4.15.0-1002.2)
linux-linaro-omap Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-linaro-shared Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-linaro-vexpress Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-lts-quantal Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-lts-raring Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-lts-saucy Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Ignored (end of life, was needs-triage)
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Released (4.4.0-103.126~14.04.1)
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-mako Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Ignored (abandoned)
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-manta Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-oem Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Released (4.13.0-1010.11)
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Not vulnerable (4.15.0-1002.3)
linux-qcm-msm Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	artful	Released (4.13.0-1008.8)
	trusty	Does not exist
	xenial	Released (4.4.0-1079.87)
	zesty	Ignored (end of life)
	upstream	Released (4.14~rc7)
	bionic	Not vulnerable (4.13.0-1008.8)
linux-snapdragon Launchpad, Ubuntu, Debian	artful	Released (4.4.0-1081.86)
	trusty	Does not exist
	xenial	Released (4.4.0-1081.86)
	zesty	Released (4.4.0-1081.86)
	upstream	Released (4.14~rc7)
	bionic	Not vulnerable
linux-ti-omap4 Launchpad, Ubuntu, Debian	artful	Does not exist
	trusty	Does not exist
	xenial	Does not exist
	zesty	Does not exist
	upstream	Released (4.14~rc7)
	bionic	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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