01 Record

CVE-2018-21029

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

UnratedPUBLISHEDCNA: mitre

CNA base scoreUnratedNo CNA CVSS vector

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02 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

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 3.13% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 87.7% of scored records. A rank, not a probability.
NVD base score: 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2019-10-30 21:46Z7 YR AGO

Last updated

2024-08-05 12:19Z2 YR AGO

Reserved

2019-10-30

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-295Improper Certificate ValidationBase

Data version

5.1

Document digest

3de4f5c6600f7a24cbc0919a12a6ea59b4cff9edb5be9a49feea6f55166be78f

05 Affected products

VendorProductVersionsPlatforms

fedoraprojectfedoraNot specified—

redhatenterprise_linuxNot specified—

redhatopenshiftNot specified—

systemd_projectsystemdNot specified—

06 References

github.comhttps://github.com/systemd/systemd/issues/9397x_refsource_MISC
blog.cloudflare.comhttps://blog.cloudflare.com/dns-encryption-explained/x_refsource_MISC
github.comhttps://github.com/systemd/systemd/blob/v243/src/resolve/resolved-dnstls-gnutls.c#L62-L63x_refsource_MISC
lists.fedoraproject.orgFEDORA-2019-4c3ce3aa5chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/vendor-advisoryx_refsource_FEDORA
security.netapp.comhttps://security.netapp.com/advisory/ntap-20191122-0002/x_refsource_CONFIRM
github.comhttps://github.com/systemd/systemd/pull/13870x_refsource_MISC
github.comhttps://github.com/systemd/systemd/blob/v243/man/resolved.conf.xml#L196-L207x_refsource_MISC
github.comhttps://github.com/systemd/systemd/blob/v239/man/resolved.conf.xml#L199-L207x_refsource_MISC
tools.ietf.orghttps://tools.ietf.org/html/rfc7858#section-4.1x_refsource_MISC

07 Fixed in

Debian 12

systemd
Fixed in 244-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

systemd
Fixed in 244-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

systemd
Fixed in 244-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.