CVE-2018-21029

Published: Oct 30, 2019Modified: Nov 21, 2024

9.8

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 3.9 / Impact: 5.9

Source: NVD

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)

Affected (2)

Products: Systemd Project: Systemd · Fedoraproject: Fedora

Systemd Project

1 product

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Systemd Project Systemd	From 239 to 244

Configuration B

1 vulnerable

Vulnerable Software	Affected Versions
Fedoraproject Fedora	Version 31

Related CWEs

Improper Certificate Validation

The product does not validate, or incorrectly validates, a certificate.

References (18)

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

Source: cve@mitre.org

Third Party Advisory

https://github.com/systemd/systemd/blob/v239/man/resolved.conf.xml#L199-L207

Source: cve@mitre.org

ExploitThird Party Advisory

https://github.com/systemd/systemd/blob/v243/man/resolved.conf.xml#L196-L207

Source: cve@mitre.org

ExploitThird Party Advisory

https://github.com/systemd/systemd/blob/v243/src/resolve/resolved-dnstls-gnutls.c#L62-L63

Source: cve@mitre.org

PatchThird Party Advisory

https://github.com/systemd/systemd/issues/9397

Source: cve@mitre.org

Issue TrackingThird Party Advisory

https://github.com/systemd/systemd/pull/13870

Source: cve@mitre.org

PatchThird Party Advisory

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

Source: cve@mitre.org

https://security.netapp.com/advisory/ntap-20191122-0002/

Source: cve@mitre.org

Third Party Advisory

https://tools.ietf.org/html/rfc7858#section-4.1

Source: cve@mitre.org

Third Party Advisory

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

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://github.com/systemd/systemd/blob/v239/man/resolved.conf.xml#L199-L207

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitThird Party Advisory

https://github.com/systemd/systemd/blob/v243/man/resolved.conf.xml#L196-L207

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitThird Party Advisory

https://github.com/systemd/systemd/blob/v243/src/resolve/resolved-dnstls-gnutls.c#L62-L63

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

https://github.com/systemd/systemd/issues/9397

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingThird Party Advisory

https://github.com/systemd/systemd/pull/13870

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

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

Source: af854a3a-2127-422b-91ae-364da2661108

https://security.netapp.com/advisory/ntap-20191122-0002/

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://tools.ietf.org/html/rfc7858#section-4.1

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

Timeline

No history available yet.