DEBIAN-CVE-2021-3502

DEBIAN-CVE-2021-3502 PUBLISHED CVSS 5.5 MEDIUM

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.

Risk Scores

CVSS 3.1

5.5

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
Debian:14	avahi	0, 0, 0
Debian:12	avahi	0, 0, 0
Debian:13	avahi	0, 0, 0
Debian:11	avahi	0, 0.8-5, 0

Exploit Intelligence

avahi.rb (github-poc)
avahi.rb (github-poc)

Timeline

May 7, 2021 CVE Published
Apr 28, 2026 CVE Updated

References

https://security-tracker.debian.org/tracker/CVE-2021-3502 advisory

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