CVE-2018-20449

Published: 4 April 2019

The hidma_chan_stats function in drivers/dma/qcom/hidma_dbg.c in the Linux kernel 4.14.90 allows local users to obtain sensitive address information by reading "callback=" lines in a debugfs file.

Notes

Author	Note
tyhicks	Two mitigating factors for this issue are that debugfs files are restricted to root and KASLR is only used in 18.04 and newer

Priority

Cvss 3 Severity Score

5.5

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)
	trusty	Not vulnerable (3.11.0-12.19)
	upstream	Released (4.15~rc2)
	xenial	Not vulnerable (4.2.0-16.19)
	Patches: Introduced by 570d0176296f0d17c4b5ab206ad4a4bc027b863b Fixed by ad67b74d2469d9b82aaa572d76474c95bc484d57
linux-aws Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1001.1)
	cosmic	Not vulnerable (4.15.0-1007.7)
	trusty	Not vulnerable (4.4.0-1002.2)
	upstream	Released (4.15~rc2)
	xenial	Not vulnerable (4.4.0-1001.10)
linux-aws-hwe Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc2)
	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)
	trusty	Not vulnerable (4.15.0-1023.24~14.04.1)
	upstream	Released (4.15~rc2)
	xenial	Not vulnerable (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
	trusty	Does not exist
	upstream	Released (4.15~rc2)
	xenial	Not vulnerable (4.15.0-1013.13~16.04.2)
linux-euclid Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc2)
	xenial	Ignored (was needs-triage ESM criteria)
linux-flo Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc2)
	xenial	Ignored (abandoned)
linux-gcp Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1001.1)
	cosmic	Not vulnerable (4.15.0-1006.6)
	trusty	Does not exist
	upstream	Released (4.15~rc2)
	xenial	Not vulnerable (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
	trusty	Does not exist
	upstream	Released (4.15~rc2)
	xenial	Does not exist
linux-gke Launchpad, Ubuntu, Debian	bionic	Not vulnerable
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc2)
	xenial	Ignored (end of standard support)
linux-goldfish Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc2)
	xenial	Ignored (end of life)
linux-grouper Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc2)
	xenial	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.18.0-13.14~18.04.1)
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc2)
	xenial	Not vulnerable (4.15.0-24.26~16.04.1)
linux-hwe-edge Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.0.0-8.9~18.04.1)
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc2)
	xenial	Not vulnerable (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)
	trusty	Does not exist
	upstream	Released (4.15~rc2)
	xenial	Not vulnerable (4.4.0-1004.9)
linux-lts-trusty Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc2)
	xenial	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	upstream	Released (4.15~rc2)
	xenial	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	upstream	Released (4.15~rc2)
	xenial	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	upstream	Released (4.15~rc2)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Not vulnerable (4.4.0-13.29~14.04.1)
	upstream	Released (4.15~rc2)
	xenial	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc2)
	xenial	Does not exist
linux-mako Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc2)
	xenial	Ignored (abandoned)
linux-manta Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc2)
	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)
	trusty	Does not exist
	upstream	Released (4.15~rc2)
	xenial	Ignored (end of standard support, was needs-triage)
linux-oracle Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1007.9)
	cosmic	Not vulnerable (4.15.0-1007.9)
	trusty	Does not exist
	upstream	Released (4.15~rc2)
	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)
	trusty	Does not exist
	upstream	Released (4.15~rc2)
	xenial	Not vulnerable (4.2.0-1013.19)
linux-snapdragon Launchpad, Ubuntu, Debian	bionic	Not vulnerable
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc2)
	xenial	Not vulnerable (4.4.0-1012.12)

Severity score breakdown

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

References

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