{"id":"UBUNTU-CVE-2017-11104","details":"Knot DNS before 2.4.5 and 2.5.x before 2.5.2 contains a flaw within the TSIG protocol implementation that would allow an attacker with a valid key name and algorithm to bypass TSIG authentication if no additional ACL restrictions are set, because of an improper TSIG validity period check.","modified":"2026-04-22T11:09:11.083924Z","published":"2017-07-08T10:29:00Z","upstream":["CVE-2017-11104"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-11104"},{"type":"REPORT","url":"https://lists.nic.cz/pipermail/knot-dns-users/2017-June/001144.html"},{"type":"REPORT","url":"http://www.synacktiv.ninja/ressources/Knot_DNS_TSIG_Signature_Forgery.pdf"},{"type":"REPORT","url":"https://bugs.debian.org/865678"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2017-11104"}],"affected":[{"package":{"name":"knot","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/knot@2.1.1-1build1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.0-1","2.0.1-4","2.0.1-4build1","2.0.2-1","2.0.2-1build1","2.1.0~rc1-52-gd80ce77-1","2.1.0~rc1-55-gf227348-1","2.1.0-2","2.1.0-3","2.1.1-1","2.1.1-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.1.1-1build1","binary_name":"knot"},{"binary_version":"2.1.1-1build1","binary_name":"knot-dnsutils"},{"binary_version":"2.1.1-1build1","binary_name":"knot-host"},{"binary_version":"2.1.1-1build1","binary_name":"libdnssec0"},{"binary_version":"2.1.1-1build1","binary_name":"libknot1"},{"binary_version":"2.1.1-1build1","binary_name":"libzscanner0"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-11104.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}