CVE-2021-3502
5.5
MEDIUM
CVSS 3.1
EPSS 0.03%
Description
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.
How to fix CVE-2021-3502
To remediate CVE-2021-3502, upgrade the affected package to a fixed version below.
- —upgrade to 0.8-r5 or later
- —upgrade to 0.8-5+deb11u1 or later
Is CVE-2021-3502 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 0.8-r5
- from 0, < 0.8-5+deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |