CVE-2018-21029: systemd: incorrect certificate validation results in acceptance of any certificate signed by a trusted certificate authority for DNS over TLS

Severity: Critical

CVSS Score: 9.8

systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent, and there is no hostname validation with the GnuTLS backend. NOTE: This has been disputed by the developer as not a vulnerability since hostname validation does not have anything to do with this issue (i.e. there is no hostname to be sent)