peter bassill · operator
$ cve CVE-2018-21029 JSON

CVE-2018-21029

9.8
CRITICAL · CVSS 3.1 · EPSS 3.1% (pctl 88)

In your normal cycle

Critical by CVSS (9.8), but no sign of active exploitation.

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)

Scoring

CVSS9.8 (CRITICAL, v3.1)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS3.14% — more likely to be exploited than 88% of all CVEs
WeaknessCWE-295
On CISA KEVno
Public exploitnone known
Published2019-10-30
Last modified2026-06-17

Affected (2)

VendorProduct
fedoraprojectfedora
systemd projectsystemd

References

→ the Explorer  ·  watch your stack  ·  NVD