{"id":"UBUNTU-CVE-2019-9764","details":"HashiCorp Consul 1.4.3 lacks server hostname verification for agent-to-agent TLS communication. In other words, the product behaves as if verify_server_hostname were set to false, even when it is actually set to true. This is fixed in 1.4.4.","modified":"2025-10-24T04:47:34Z","published":"2019-03-26T14:29:00Z","upstream":["CVE-2019-9764"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-9764"},{"type":"REPORT","url":"https://github.com/hashicorp/consul/issues/5519"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-9764"}],"affected":[{"package":{"name":"consul","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/consul@0.6.4~dfsg-3?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.4~dfsg-3"],"ecosystem_specific":{"binaries":[{"binary_version":"0.6.4~dfsg-3","binary_name":"consul"},{"binary_version":"0.6.4~dfsg-3","binary_name":"golang-github-hashicorp-consul-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9764.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}