What is CVE-2021-3502?

CVE-2021-3502 is a medium-severity vulnerability in Avahi, classified under Reachable Assertion. CVSS score: 5.5/10. Published 2021-05-07.

How severe is CVE-2021-3502?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Avahi

CVE-2021-3502

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.

EPSS: 0.004 (30.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Avahi — versions 0.8-5
N/a Avahi — versions 0.8-5

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

secalert@redhat.com (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
secalert@redhat.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-3502?: CVE-2021-3502 is a medium-severity vulnerability in Avahi, classified under Reachable Assertion. CVSS score: 5.5/10. Published 2021-05-07.
How severe is CVE-2021-3502?: Medium severity. CVSS v3 base score is 5.5 out of 10.