CVE-2021-3502
Published: 7 May 2021
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.
Notes
Author | Note |
---|---|
mdeslaur | introduced in 0.8 |
Priority
Status
Package | Release | Status |
---|---|---|
avahi Launchpad, Ubuntu, Debian |
jammy |
Released
(0.8-5ubuntu4)
|
impish |
Released
(0.8-5ubuntu4)
|
|
bionic |
Not vulnerable
(code not present)
|
|
focal |
Not vulnerable
(code not present)
|
|
trusty |
Not vulnerable
(code not present)
|
|
upstream |
Needs triage
|
|
xenial |
Not vulnerable
(code not present)
|
|
groovy |
Released
(0.8-3ubuntu1.1)
|
|
hirsute |
Released
(0.8-5ubuntu3.1)
|
|
Patches: upstream: https://github.com/lathiat/avahi/commit/9d31939e55280a733d930b15ac9e4dda4497680c |
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 |