Detections
Analytics
CVE-2018-21029
critical
Description
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)
References
https://tools.ietf.org/html/rfc7858#section-4.1
https://security.netapp.com/advisory/ntap-20191122-0002/
https://github.com/systemd/systemd/pull/13870
https://github.com/systemd/systemd/issues/9397
https://github.com/systemd/systemd/blob/v243/src/resolve/resolved-dnstls-gnutls.c#L62-L63
https://github.com/systemd/systemd/blob/v243/man/resolved.conf.xml#L196-L207
https://github.com/systemd/systemd/blob/v239/man/resolved.conf.xml#L199-L207