CVEs-PoC/2018/CVE-2018-21029.md

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)

POC

Reference

• https://blog.cloudflare.com/dns-encryption-explained/
• https://github.com/systemd/systemd/issues/9397

Github

No PoCs found on GitHub currently.