CVE-2018-21029

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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/

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://blog.cloudflare.com/dns-encryption-explained/

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3