CVE-2018-20482

2018-12-2618:29:00

Alpine Linux Development Team

security.alpinelinux.org

CVSS2

1.9

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

4.7

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

4.8

Confidence

High

EPSS

Percentile

5.1%

JSON

GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local users to cause a denial of service (infinite read loop in sparse_dump_region in sparse.c) by modifying a file that is supposed to be archived by a different user’s process (e.g., a system backup running as root).

OSVersionArchitecturePackageVersionFilename
Alpineedge-mainnoarchtar< 1.31-r0UNKNOWN
Alpine3.10-mainnoarchtar< 1.31-r0UNKNOWN
Alpine3.11-mainnoarchtar< 1.31-r0UNKNOWN
Alpine3.12-mainnoarchtar< 1.31-r0UNKNOWN
Alpine3.13-mainnoarchtar< 1.31-r0UNKNOWN
Alpine3.14-mainnoarchtar< 1.31-r0UNKNOWN
Alpine3.15-mainnoarchtar< 1.31-r0UNKNOWN
Alpine3.16-mainnoarchtar< 1.31-r0UNKNOWN
Alpine3.17-mainnoarchtar< 1.31-r0UNKNOWN
Alpine3.18-mainnoarchtar< 1.31-r0UNKNOWN

OS	Version	Architecture	Package	Version	Filename
Alpine	edge-main	noarch	tar	< 1.31-r0	UNKNOWN
Alpine	3.10-main	noarch	tar	< 1.31-r0	UNKNOWN
Alpine	3.11-main	noarch	tar	< 1.31-r0	UNKNOWN
Alpine	3.12-main	noarch	tar	< 1.31-r0	UNKNOWN
Alpine	3.13-main	noarch	tar	< 1.31-r0	UNKNOWN
Alpine	3.14-main	noarch	tar	< 1.31-r0	UNKNOWN
Alpine	3.15-main	noarch	tar	< 1.31-r0	UNKNOWN
Alpine	3.16-main	noarch	tar	< 1.31-r0	UNKNOWN
Alpine	3.17-main	noarch	tar	< 1.31-r0	UNKNOWN
Alpine	3.18-main	noarch	tar	< 1.31-r0	UNKNOWN