CVE-2020-20446

2021-05-2518:15:07

Alpine Linux Development Team

security.alpinelinux.org

ffmpeg 4.2

divide by zero

aacpsy.c

denial of service

unix

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

7.9

Confidence

High

EPSS

0.017

Percentile

87.8%

JSON

FFmpeg 4.2 is affected by a Divide By Zero issue via libavcodec/aacpsy.c, which allows a remote malicious user to cause a Denial of Service.

OSVersionArchitecturePackageVersionFilename
Alpineedge-communitynoarchffmpeg< 4.4.1-r0UNKNOWN
Alpineedge-communitynoarchffmpeg4< 4.4.1-r0UNKNOWN
Alpine3.13-communitynoarchffmpeg< 4.3.3-r0UNKNOWN
Alpine3.14-communitynoarchffmpeg< 4.4.1-r0UNKNOWN
Alpine3.15-communitynoarchffmpeg< 4.4.1-r0UNKNOWN
Alpine3.16-communitynoarchffmpeg< 4.4.1-r0UNKNOWN
Alpine3.16-communitynoarchffmpeg4< 4.4.1-r0UNKNOWN
Alpine3.17-communitynoarchffmpeg< 4.4.1-r0UNKNOWN
Alpine3.17-communitynoarchffmpeg4< 4.4.1-r0UNKNOWN
Alpine3.18-communitynoarchffmpeg< 4.4.1-r0UNKNOWN

OS	Version	Architecture	Package	Version	Filename
Alpine	edge-community	noarch	ffmpeg	< 4.4.1-r0	UNKNOWN
Alpine	edge-community	noarch	ffmpeg4	< 4.4.1-r0	UNKNOWN
Alpine	3.13-community	noarch	ffmpeg	< 4.3.3-r0	UNKNOWN
Alpine	3.14-community	noarch	ffmpeg	< 4.4.1-r0	UNKNOWN
Alpine	3.15-community	noarch	ffmpeg	< 4.4.1-r0	UNKNOWN
Alpine	3.16-community	noarch	ffmpeg	< 4.4.1-r0	UNKNOWN
Alpine	3.16-community	noarch	ffmpeg4	< 4.4.1-r0	UNKNOWN
Alpine	3.17-community	noarch	ffmpeg	< 4.4.1-r0	UNKNOWN
Alpine	3.17-community	noarch	ffmpeg4	< 4.4.1-r0	UNKNOWN
Alpine	3.18-community	noarch	ffmpeg	< 4.4.1-r0	UNKNOWN