CVE-2018-10883

Published: 30 July 2018

A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bounds write in jbd2_journal_dirty_metadata(), a denial of service, and a system crash by mounting and operating on a crafted ext4 filesystem image.

From the Ubuntu Security Team

Wen Xu discovered that the ext4 file system implementation in the Linux kernel could possibly perform an out of bounds write when updating the journal for an inline file. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash).

Notes

Author	Note
sbeattie	possible reproducer in bug report

Priority

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	artful	Ignored (reached end-of-life)
	bionic	Released (4.15.0-44.47)
	cosmic	Not vulnerable (4.17.0-6.7)
	disco	Not vulnerable (4.18.0-10.11)
	trusty	Ignored (was needed ESM criteria)
	upstream	Released (4.18~rc4)
	xenial	Released (4.4.0-142.168)
	Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Fixed by e09463f220ca9a1a1ecfda84fcda658f99a1f12a Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Fixed by 8bc1379b82b8e809eef77a9fedbb75c6c297be19
linux-aws Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Released (4.15.0-1032.34)
	cosmic	Not vulnerable (4.18.0-1002.3)
	disco	Not vulnerable (4.18.0-1002.3)
	trusty	Released (4.4.0-1038.41)
	upstream	Released (4.18~rc4)
	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 (4.18~rc4)
	xenial	Released (4.15.0-1032.34~16.04.1)
linux-azure Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Released (4.15.0-1037.39)
	cosmic	Not vulnerable (4.18.0-1003.3)
	disco	Not vulnerable (4.18.0-1003.3)
	trusty	Released (4.15.0-1037.39~14.04.2)
	upstream	Released (4.18~rc4)
	xenial	Released (4.15.0-1037.39~16.04.1)
linux-azure-edge Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Released (4.15.0-1037.39)
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.18~rc4)
	xenial	Released (4.15.0-1037.39~16.04.1)
linux-euclid Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.18~rc4)
	xenial	Ignored (was needed ESM criteria)
linux-flo Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.18~rc4)
	xenial	Ignored (abandoned)
linux-gcp Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Released (4.15.0-1027.28)
	cosmic	Not vulnerable (4.18.0-1002.3)
	disco	Not vulnerable (4.18.0-1002.3)
	trusty	Does not exist
	upstream	Released (4.18~rc4)
	xenial	Released (4.15.0-1027.28~16.04.1)
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 (4.18~rc4)
	xenial	Does not exist
linux-gke Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.18~rc4)
	xenial	Ignored (end-of-life)
linux-goldfish Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.18~rc4)
	xenial	Ignored (end-of-life)
linux-grouper Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.18~rc4)
	xenial	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	artful	Does not exist
	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 (4.18~rc4)
	xenial	Released (4.15.0-45.48~16.04.1)
linux-hwe-edge Launchpad, Ubuntu, Debian	artful	Does not exist
	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 (4.18~rc4)
	xenial	Released (4.15.0-45.48~16.04.1)
linux-kvm Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Released (4.15.0-1029.29)
	cosmic	Not vulnerable (4.18.0-1002.2)
	disco	Not vulnerable (4.18.0-1003.3)
	trusty	Does not exist
	upstream	Released (4.18~rc4)
	xenial	Released (4.4.0-1040.46)
linux-lts-trusty Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist
	upstream	Released (4.18~rc4)
	xenial	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [end-of-life])
	upstream	Released (4.18~rc4)
	xenial	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [end-of-life])
	upstream	Released (4.18~rc4)
	xenial	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [end-of-life])
	upstream	Released (4.18~rc4)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Released (4.4.0-142.168~14.04.1)
	upstream	Released (4.18~rc4)
	xenial	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.18~rc4)
	xenial	Does not exist
linux-mako Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.18~rc4)
	xenial	Ignored (abandoned)
linux-manta Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.18~rc4)
	xenial	Does not exist
linux-oem Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Released (4.15.0-1033.38)
	cosmic	Released (4.15.0-1033.38)
	disco	Not vulnerable (4.15.0-1033.38)
	trusty	Does not exist
	upstream	Released (4.18~rc4)
	xenial	Ignored (was needed now end-of-life)
linux-oracle Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1008.10)
	cosmic	Released (4.15.0-1008.10)
	disco	Not vulnerable (4.15.0-1008.10)
	trusty	Does not exist
	upstream	Released (4.18~rc4)
	xenial	Released (4.15.0-1008.10~16.04.1)
linux-raspi2 Launchpad, Ubuntu, Debian	artful	Ignored (reached end-of-life)
	bionic	Released (4.15.0-1031.33)
	cosmic	Not vulnerable (4.18.0-1004.6)
	disco	Not vulnerable (4.18.0-1005.7)
	trusty	Does not exist
	upstream	Released (4.18~rc4)
	xenial	Released (4.4.0-1103.111)
linux-snapdragon Launchpad, Ubuntu, Debian	artful	Ignored (reached end-of-life)
	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 (4.18~rc4)
	xenial	Released (4.4.0-1107.112)

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

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 ›