CVE-2021-3502

2021-05-0712:15:07

Alpine Linux Development Team

security.alpinelinux.org

avahi

vulnerability

local attacker

service availability

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

5.6

Confidence

High

EPSS

Percentile

5.1%

JSON

A flaw was found in avahi 0.8-5. A reachable assertion is present in avahi_s_host_name_resolver_start function allowing a local attacker to crash the avahi service by requesting hostname resolutions through the avahi socket or dbus methods for invalid hostnames. The highest threat from this vulnerability is to the service availability.

OSVersionArchitecturePackageVersionFilename
Alpineedge-mainnoarchavahi< 0.8-r5UNKNOWN
Alpine3.18-mainnoarchavahi< 0.8-r5UNKNOWN
Alpine3.19-mainnoarchavahi< 0.8-r5UNKNOWN
Alpine3.20-mainnoarchavahi< 0.8-r5UNKNOWN

OS	Version	Architecture	Package	Version	Filename
Alpine	edge-main	noarch	avahi	< 0.8-r5	UNKNOWN
Alpine	3.18-main	noarch	avahi	< 0.8-r5	UNKNOWN
Alpine	3.19-main	noarch	avahi	< 0.8-r5	UNKNOWN
Alpine	3.20-main	noarch	avahi	< 0.8-r5	UNKNOWN