{"id":"AZL-34547","summary":"CVE-2021-26720 affecting package avahi for versions less than 0.8-1","details":"avahi-daemon-check-dns.sh in the Debian avahi package through 0.8-4 is executed as root via /etc/network/if-up.d/avahi-daemon, and allows a local attacker to cause a denial of service or create arbitrary empty files via a symlink attack on files under /run/avahi-daemon. NOTE: this only affects the packaging for Debian GNU/Linux (used indirectly by SUSE), not the upstream Avahi product.","modified":"2026-04-21T04:27:10.325410Z","published":"2021-02-17T22:15:12Z","upstream":["CVE-2021-26720"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26720"}],"affected":[{"package":{"name":"avahi","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/avahi"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-34547.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}