CVE-2018-19824

Published: 3 December 2018

In the Linux kernel through 4.19.6, a local user could exploit a use-after-free in the ALSA driver by supplying a malicious USB Sound device (with zero interfaces) that is mishandled in usb_audio_probe in sound/usb/card.c.

From the Ubuntu Security Team

Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the Advanced Linux Sound Architecture (ALSA) subsystem. A physically proximate attacker could use this to cause a denial of service (system crash).

Priority

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-47.50)
	cosmic	Released (4.18.0-17.18)
	disco	Not vulnerable (4.19.0-12.13)
	trusty	Released (3.13.0-168.218)
	upstream	Released (4.20~rc6)
	xenial	Released (4.4.0-142.168)
	Patches: Introduced by 362e4e49abe53e89d87455dfcd7c1bbaf08a839d Fixed by 5f8cf712582617d523120df67d392059eaf2fc4b
linux-aws Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1035.37)
	cosmic	Released (4.18.0-1012.14)
	disco	Not vulnerable (5.0.0-1001.1)
	trusty	Released (4.4.0-1038.41)
	upstream	Released (4.20~rc6)
	xenial	Released (4.4.0-1075.85)
linux-aws-hwe Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.20~rc6)
	xenial	Released (4.15.0-1035.37~16.04.1)
linux-azure Launchpad, Ubuntu, Debian	bionic	Released (4.18.0-1014.14~18.04.1)
	cosmic	Released (4.18.0-1014.14)
	disco	Not vulnerable (5.0.0-1001.1)
	trusty	Released (4.15.0-1041.45~14.04.1)
	upstream	Released (4.20~rc6)
	xenial	Released (4.15.0-1041.45)
linux-azure-edge Launchpad, Ubuntu, Debian	bionic	Released (4.18.0-1014.14~18.04.1)
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.20~rc6)
	xenial	Released (4.15.0-1041.45)
linux-euclid Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.20~rc6)
	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 (4.20~rc6)
	xenial	Ignored (abandoned)
linux-gcp Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1029.31)
	cosmic	Released (4.18.0-1008.9)
	disco	Not vulnerable (5.0.0-1001.1)
	trusty	Does not exist
	upstream	Released (4.20~rc6)
	xenial	Released (4.15.0-1029.31~16.04.1)
linux-gcp-edge Launchpad, Ubuntu, Debian	bionic	Released (4.18.0-1008.9~18.04.1)
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.20~rc6)
	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 (4.20~rc6)
	xenial	Ignored (end-of-life)
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 (4.20~rc6)
	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 (4.20~rc6)
	xenial	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	bionic	Released (4.18.0-17.18~18.04.1)
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.20~rc6)
	xenial	Released (4.15.0-47.50~16.04.1)
linux-hwe-edge Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.0.0-15.16~18.04.1)
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.20~rc6)
	xenial	Released (4.15.0-47.50~16.04.1)
linux-kvm Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1031.31)
	cosmic	Released (4.18.0-1009.9)
	disco	Not vulnerable (5.0.0-1001.1)
	trusty	Does not exist
	upstream	Released (4.20~rc6)
	xenial	Released (4.4.0-1040.46)
linux-lts-trusty Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.20~rc6)
	xenial	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [end-of-life])
	upstream	Released (4.20~rc6)
	xenial	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [end-of-life])
	upstream	Released (4.20~rc6)
	xenial	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [end-of-life])
	upstream	Released (4.20~rc6)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Released (4.4.0-142.168~14.04.1)
	upstream	Released (4.20~rc6)
	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 (4.20~rc6)
	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 (4.20~rc6)
	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 (4.20~rc6)
	xenial	Does not exist
linux-oem Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1035.40)
	cosmic	Released (4.15.0-1035.40)
	disco	Not vulnerable (4.15.0-1035.40)
	trusty	Does not exist
	upstream	Released (4.20~rc6)
	xenial	Ignored (was needs-triage now end-of-life)
linux-oracle Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1010.12)
	cosmic	Released (4.15.0-1010.12)
	disco	Not vulnerable (4.15.0-1010.12)
	trusty	Does not exist
	upstream	Released (4.20~rc6)
	xenial	Released (4.15.0-1010.12~16.04.1)
linux-raspi2 Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1033.35)
	cosmic	Released (4.18.0-1011.13)
	disco	Not vulnerable (5.0.0-1004.4)
	trusty	Does not exist
	upstream	Released (4.20~rc6)
	xenial	Released (4.4.0-1103.111)
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 (4.20~rc6)
	xenial	Released (4.4.0-1107.112)

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:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Bugs

https://bugzilla.suse.com/show_bug.cgi?id=1118152

Join the discussion

Canonical is offering Expanded Security Maintenance

Canonical is offering Ubuntu Expanded Security Maintenance (ESM) for security fixes and essential packages.

Find out more about ESM ›