CVE-2018-21029
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2018-21029
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-21029.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2018-21029
- Downstream
- Related
- Published
- 2019-10-30T22:15:10Z
- Modified
- 2025-10-15T09:34:52.994210Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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)
- Database specific
{ "isDisputed": true }- References
-
- https://blog.cloudflare.com/dns-encryption-explained/
- https://github.com/systemd/systemd/blob/v239/man/resolved.conf.xml#L199-L207
- https://github.com/systemd/systemd/blob/v243/man/resolved.conf.xml#L196-L207
- https://github.com/systemd/systemd/blob/v243/src/resolve/resolved-dnstls-gnutls.c#L62-L63
- https://github.com/systemd/systemd/issues/9397
- https://github.com/systemd/systemd/pull/13870
- https://security.netapp.com/advisory/ntap-20191122-0002/
- https://tools.ietf.org/html/rfc7858#section-4.1
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/