CVE-2018-16658

Published: 7 September 2018

An issue was discovered in the Linux kernel before 4.18.6. An information leak in cdrom_ioctl_drive_status in drivers/cdrom/cdrom.c could be used by local attackers to read kernel memory because a cast from unsigned long to int interferes with bounds checking. This is similar to CVE-2018-10940.

From the Ubuntu Security Team

It was discovered that an integer overflow existed in the CD-ROM driver of the Linux kernel. A local attacker could use this to expose sensitive information (kernel memory).

Priority

Cvss 3 Severity Score

6.1

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-39.42)
	cosmic	Not vulnerable (4.18.0-8.9)
	trusty	Released (3.13.0-162.212)
	upstream	Released (4.19~rc2)
	xenial	Released (4.4.0-138.164)
	Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Fixed by 8f3fafc9c2f0ece10832c25f7ffcb07c97a32ad4
linux-aws Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1027.27)
	cosmic	Not vulnerable (4.18.0-1002.3)
	trusty	Released (4.4.0-1032.35)
	upstream	Released (4.19~rc2)
	xenial	Released (4.4.0-1070.80)
linux-azure Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1031.32)
	cosmic	Not vulnerable (4.18.0-1003.3)
	trusty	Released (4.15.0-1031.32~14.04.1)
	upstream	Released (4.19~rc2)
	xenial	Released (4.15.0-1031.32~16.04.1)
linux-azure-edge Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.18.0-1006.6~18.04.1)
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.19~rc2)
	xenial	Released (4.15.0-1031.32)
linux-euclid Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.19~rc2)
	xenial	Ignored (was needed 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 (4.19~rc2)
	xenial	Ignored (abandoned)
linux-gcp Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1024.25)
	cosmic	Not vulnerable (4.18.0-1002.3)
	trusty	Does not exist
	upstream	Released (4.19~rc2)
	xenial	Released (4.15.0-1024.25~16.04.2)
linux-gke Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.19~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 (4.19~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 (4.19~rc2)
	xenial	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.18.0-12.13~18.04.2)
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.19~rc2)
	xenial	Released (4.15.0-39.42~16.04.1)
linux-hwe-edge Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.18.0-12.13~18.04.2)
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.19~rc2)
	xenial	Released (4.15.0-39.42~16.04.1)
linux-kvm Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1026.26)
	cosmic	Not vulnerable (4.18.0-1002.2)
	trusty	Does not exist
	upstream	Released (4.19~rc2)
	xenial	Released (4.4.0-1036.42)
linux-lts-trusty Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.19~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 (4.19~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 (4.19~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 (4.19~rc2)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	trusty	Released (4.4.0-138.164~14.04.1)
	upstream	Released (4.19~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 (4.19~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 (4.19~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 (4.19~rc2)
	xenial	Does not exist
linux-oem Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1026.31)
	cosmic	Released (4.15.0-1026.31)
	trusty	Does not exist
	upstream	Released (4.19~rc2)
	xenial	Ignored (end of standard support, was needed)
linux-raspi2 Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1028.30)
	cosmic	Not vulnerable (4.18.0-1004.6)
	trusty	Does not exist
	upstream	Released (4.19~rc2)
	xenial	Released (4.4.0-1099.107)
linux-snapdragon Launchpad, Ubuntu, Debian	bionic	Not vulnerable
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.19~rc2)
	xenial	Released (4.4.0-1103.108)

Severity score breakdown

Parameter	Value
Base score	6.1
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

References

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 ›