CVE-2019-19449

2019-12-0800:00:00

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

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.001 Low

EPSS

Percentile

34.9%

JSON

In the Linux kernel 5.0.21, mounting a crafted f2fs filesystem image can
lead to slab-out-of-bounds read access in f2fs_build_segment_manager in
fs/f2fs/segment.c, related to init_min_max_mtime in fs/f2fs/segment.c
(because the second argument to get_seg_entry is not validated).

Notes

Author	Note
tyhicks	Exploiting this vulnerability requires a crafted filesystem image to be mounted

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-162.170UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-90.101UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-222.255) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1115.122UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1059.62UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1102.107) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1138.152) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1059.62~18.04.1UNKNOWN
ubuntu16.04noarchlinux-aws-hwe< 4.15.0-1115.122~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1063.66UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-162.170	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-90.101	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-222.255) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1115.122	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1059.62	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< 4.4.0-1102.107) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	16.04	noarch	linux-aws	< 4.4.0-1138.152) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1059.62~18.04.1	UNKNOWN
ubuntu	16.04	noarch	linux-aws-hwe	< 4.15.0-1115.122~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< 5.4.0-1063.66	UNKNOWN