vulnerability
Red Hat: CVE-2021-3502: reachable assertion in avahi_s_host_name_resolver_start when trying to resolve badly-formatted hostnames (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 2 | (AV:L/AC:L/Au:N/C:N/I:N/A:P) | May 7, 2021 | Nov 8, 2023 | Mar 27, 2026 |
Severity
2
CVSS
(AV:L/AC:L/Au:N/C:N/I:N/A:P)
Published
May 7, 2021
Added
Nov 8, 2023
Modified
Mar 27, 2026
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.
Solutions
redhat-upgrade-avahiredhat-upgrade-avahi-autoipd-debuginforedhat-upgrade-avahi-compat-howlredhat-upgrade-avahi-compat-howl-debuginforedhat-upgrade-avahi-compat-howl-develredhat-upgrade-avahi-compat-libdns_sdredhat-upgrade-avahi-compat-libdns_sd-debuginforedhat-upgrade-avahi-compat-libdns_sd-develredhat-upgrade-avahi-debuginforedhat-upgrade-avahi-debugsourceredhat-upgrade-avahi-develredhat-upgrade-avahi-dnsconfd-debuginforedhat-upgrade-avahi-glibredhat-upgrade-avahi-glib-debuginforedhat-upgrade-avahi-glib-develredhat-upgrade-avahi-gobject-debuginforedhat-upgrade-avahi-libsredhat-upgrade-avahi-libs-debuginforedhat-upgrade-avahi-toolsredhat-upgrade-avahi-tools-debuginforedhat-upgrade-avahi-ui-debuginforedhat-upgrade-avahi-ui-gtk3-debuginforedhat-upgrade-avahi-ui-tools-debuginfo
Rapid7 Labs
2026 Global Threat Landscape Report
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