CVE-2019-19816

2019-12-1700:00:00

ubuntu.com

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

9.3 High

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

0.001 Low

EPSS

Percentile

45.5%

JSON

In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image and
performing some operations can cause slab-out-of-bounds write access in
__btrfs_map_block in fs/btrfs/volumes.c, because a value of 1 for the
number of data stripes is mishandled.

Bugs

<https://bugzilla.suse.com/show_bug.cgi?id=1159439>

Notes

Author	Note
tyhicks	As of 2020-01-09, no upstream fix is available
sbeattie	upstream developer asserts in suse bug that the enhanced btrfs tree-checker will address this issue, so would be fixed in 4.4.x and newer

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-109.110UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-201.233UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1077.81UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1085.89) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1121.135UNKNOWN
ubuntu16.04noarchlinux-aws-hwe< 4.15.0-1079.83~16.04.1UNKNOWN
ubuntu14.04noarchlinux-azure< 4.15.0-1091.101~14.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchlinux-azure< 4.15.0-1091.101~16.04.1UNKNOWN
ubuntu18.04noarchlinux-azure-4.15< 4.15.0-1091.101UNKNOWN
ubuntu16.04noarchlinux-gcp< 4.15.0-1080.90~16.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-109.110	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-201.233	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1077.81	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< 4.4.0-1085.89) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	16.04	noarch	linux-aws	< 4.4.0-1121.135	UNKNOWN
ubuntu	16.04	noarch	linux-aws-hwe	< 4.15.0-1079.83~16.04.1	UNKNOWN
ubuntu	14.04	noarch	linux-azure	< 4.15.0-1091.101~14.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	16.04	noarch	linux-azure	< 4.15.0-1091.101~16.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-azure-4.15	< 4.15.0-1091.101	UNKNOWN
ubuntu	16.04	noarch	linux-gcp	< 4.15.0-1080.90~16.04.1	UNKNOWN