CVE-2018-21029

EUVD-2018-13551
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)
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 81%
Affected Products (NVD)
VendorProductVersion
systemd_projectsystemd
239 ≤
𝑥
< 244
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
systemd
bookworm
252.30-1~deb12u2
fixed
bullseye
247.3-7+deb11u5
fixed
bullseye (security)
247.3-7+deb11u6
fixed
buster
not-affected
jessie
not-affected
sid
256.7-3
fixed
stretch
not-affected
trixie
256.7-3
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
systemd
bionic
not-affected
disco
ignored
eoan
not-affected
trusty
not-affected
xenial
not-affected
Common Weakness Enumeration
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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/
https://security.netapp.com/advisory/ntap-20191122-0002/
https://tools.ietf.org/html/rfc7858#section-4.1
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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/
https://security.netapp.com/advisory/ntap-20191122-0002/
https://tools.ietf.org/html/rfc7858#section-4.1