CVE-2021-3468
Published: 2 June 2021
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.
Notes
Author | Note |
---|---|
mdeslaur | as of 2021-07-06, the proposed patch has not been commited upstream |
Priority
Status
Package | Release | Status |
---|---|---|
avahi Launchpad, Ubuntu, Debian |
impish |
Released
(0.8-5ubuntu3)
|
bionic |
Released
(0.7-3.1ubuntu1.3)
|
|
focal |
Released
(0.7-4ubuntu7.1)
|
|
groovy |
Released
(0.8-3ubuntu1.1)
|
|
hirsute |
Released
(0.8-5ubuntu3)
|
|
trusty |
Released
(0.6.31-4ubuntu1.3+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
upstream |
Needed
|
|
xenial |
Released
(0.6.32~rc+dfsg-1ubuntu2.3+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
jammy |
Released
(0.8-5ubuntu3)
|
|
Patches: other: https://github.com/lathiat/avahi/pull/330 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.5 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |