CVE-2018-9517

Published: 7 December 2018

In pppol2tp_connect, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Product: Android. Versions: Android kernel. Android ID: A-38159931.

From the Ubuntu Security Team

It was discovered that a use-after-free vulnerability existed in the PPP over L2TP implementation in the Linux kernel. A privileged local attacker could use this to possibly execute arbitrary code.

Priority

Cvss 3 Severity Score

6.7

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-10.11)
	cosmic	Not vulnerable (4.15.0-20.21)
	disco	Not vulnerable (4.18.0-10.11)
	trusty	Ignored (was needed ESM criteria)
	upstream	Released (4.14~rc1)
	xenial	Released (4.4.0-145.171)
	Patches: Introduced by 309795f4bec2d69cd507a631f82065c2198a0825 Fixed by f026bc29a8e093edfbb2a77700454b285c97e8ad
linux-aws Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1001.1)
	cosmic	Not vulnerable (4.15.0-1007.7)
	disco	Not vulnerable (4.18.0-1002.3)
	trusty	Released (4.4.0-1040.43)
	upstream	Released (4.14~rc1)
	xenial	Released (4.4.0-1079.89)
linux-aws-hwe Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.14~rc1)
	xenial	Not vulnerable (4.15.0-1030.31~16.04.1)
linux-azure Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1002.2)
	cosmic	Not vulnerable (4.15.0-1009.9)
	disco	Not vulnerable (4.18.0-1003.3)
	trusty	Not vulnerable (4.15.0-1023.24~14.04.1)
	upstream	Released (4.14~rc1)
	xenial	Released (4.15.0-1013.13~16.04.2)
linux-azure-edge Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1002.2)
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.14~rc1)
	xenial	Released (4.15.0-1013.13~16.04.2)
linux-euclid Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.14~rc1)
	xenial	Ignored (was needed ESM criteria)
linux-flo Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.14~rc1)
	xenial	Ignored (abandoned)
linux-gcp Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1001.1)
	cosmic	Not vulnerable (4.15.0-1006.6)
	disco	Not vulnerable (4.18.0-1002.3)
	trusty	Does not exist
	upstream	Released (4.14~rc1)
	xenial	Released (4.15.0-1014.14~16.04.1)
linux-gcp-edge Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.18.0-1004.5~18.04.1)
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.14~rc1)
	xenial	Does not exist
linux-gke Launchpad, Ubuntu, Debian	bionic	Not vulnerable
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.14~rc1)
	xenial	Ignored (end of standard support)
linux-goldfish Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.14~rc1)
	xenial	Ignored (end of life)
linux-grouper Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.14~rc1)
	xenial	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.18.0-13.14~18.04.1)
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.14~rc1)
	xenial	Released (4.15.0-24.26~16.04.1)
linux-hwe-edge Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.0.0-14.15~18.04.1)
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.14~rc1)
	xenial	Released (4.15.0-24.26~16.04.1)
linux-kvm Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1002.2)
	cosmic	Not vulnerable (4.15.0-1008.8)
	disco	Not vulnerable (4.18.0-1003.3)
	trusty	Does not exist
	upstream	Released (4.14~rc1)
	xenial	Released (4.4.0-1043.49)
linux-lts-trusty Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.14~rc1)
	xenial	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Ignored (end of life, was ignored)
	upstream	Released (4.14~rc1)
	xenial	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Ignored (end of life, was ignored)
	upstream	Released (4.14~rc1)
	xenial	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Ignored (end of life, was ignored)
	upstream	Released (4.14~rc1)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Released (4.4.0-144.170~14.04.1)
	upstream	Released (4.14~rc1)
	xenial	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.14~rc1)
	xenial	Does not exist
linux-mako Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.14~rc1)
	xenial	Ignored (abandoned)
linux-manta Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.14~rc1)
	xenial	Does not exist
linux-oem Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1002.3)
	cosmic	Not vulnerable (4.15.0-1004.5)
	disco	Not vulnerable (4.15.0-1021.24)
	trusty	Does not exist
	upstream	Released (4.14~rc1)
	xenial	Ignored (end of standard support, was needed)
linux-oracle Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1007.9)
	cosmic	Not vulnerable (4.15.0-1007.9)
	disco	Not vulnerable (4.15.0-1007.9)
	trusty	Does not exist
	upstream	Released (4.14~rc1)
	xenial	Not vulnerable (4.15.0-1007.9~16.04.1)
linux-raspi2 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1006.7)
	cosmic	Not vulnerable (4.15.0-1010.11)
	disco	Not vulnerable (4.18.0-1005.7)
	trusty	Does not exist
	upstream	Released (4.14~rc1)
	xenial	Released (4.4.0-1106.114)
linux-snapdragon Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1053.57)
	cosmic	Does not exist
	disco	Not vulnerable (5.0.0-1010.10)
	trusty	Does not exist
	upstream	Released (4.14~rc1)
	xenial	Released (4.4.0-1110.115)

Severity score breakdown

Parameter	Value
Base score	6.7
Attack vector	Local
Attack complexity	Low
Privileges required	High
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

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