CVE-2021-3468

2021-06-0200:00:00

ubuntu.com

5.5 Medium

CVSS3

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

2.1 Low

CVSS2

Access Vector

LOCAL

Access 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

0.0004 Low

EPSS

Percentile

5.3%

JSON

A flaw was found in avahi in versions 0.6 up to 0.8. The event used to
signal the termination of the client connection on the avahi Unix socket is
not correctly handled in the client_work function, allowing a local
attacker to trigger an infinite loop. The highest threat from this
vulnerability is to the availability of the avahi service, which becomes
unresponsive after this flaw is triggered.

Bugs

Notes

Author	Note
mdeslaur	as of 2021-07-06, the proposed patch has not been commited upstream

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchavahi< 0.7-3.1ubuntu1.3UNKNOWN
ubuntu20.04noarchavahi< 0.7-4ubuntu7.1UNKNOWN
ubuntu20.10noarchavahi< 0.8-3ubuntu1.1UNKNOWN
ubuntu21.04noarchavahi< 0.8-5ubuntu3UNKNOWN
ubuntu21.10noarchavahi< 0.8-5ubuntu3UNKNOWN
ubuntu22.04noarchavahi< 0.8-5ubuntu3UNKNOWN
ubuntu14.04noarchavahi< 0.6.31-4ubuntu1.3+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchavahi< 0.6.32~rc+dfsg-1ubuntu2.3+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	avahi	< 0.7-3.1ubuntu1.3	UNKNOWN
ubuntu	20.04	noarch	avahi	< 0.7-4ubuntu7.1	UNKNOWN
ubuntu	20.10	noarch	avahi	< 0.8-3ubuntu1.1	UNKNOWN
ubuntu	21.04	noarch	avahi	< 0.8-5ubuntu3	UNKNOWN
ubuntu	21.10	noarch	avahi	< 0.8-5ubuntu3	UNKNOWN
ubuntu	22.04	noarch	avahi	< 0.8-5ubuntu3	UNKNOWN
ubuntu	14.04	noarch	avahi	< 0.6.31-4ubuntu1.3+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	16.04	noarch	avahi	< 0.6.32~rc+dfsg-1ubuntu2.3+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN