CVE-2018-21029

CWE-295 — Improper Certificate Validation9 documents8 sources
Severity
9.8CRITICAL
EPSS
1.6%
top 18.52%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Systemd Project SystemdFedoraproject Fedora
Timeline
PublishedOct 30
Latest updateMay 24

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)

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages2 packages

▶NVDsystemd_project/systemd239 — 244
▶Debiansystemd< 244-1+3

Also affects: Fedora 31

Patches

Patch: github.com ↗Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-h2fw-qh29-9jv7: systemd 239 through 243 accepts any certificate signed by a trusted certificate authority for DNS Over TLS↗2022-05-24
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CVEList
CVE-2018-21029: systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS↗2019-10-30
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OSV
CVE-2018-21029: systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS↗2019-10-30
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📋Vendor Advisories

3
Microsoft
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↗2019-10-08
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Red Hat
systemd: incorrect certificate validation results in acceptance of any certificate signed by a trusted certificate authority for DNS over TLS↗2018-06-24
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Debian
CVE-2018-21029: systemd - systemd 239 through 245 accepts any certificate signed by a trusted certificate ...↗2018
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💬Community

2
Bugzilla
CVE-2018-21029 systemd: incorrect certificate validation results in acceptance of any certificate signed by a trusted certificate authority for DNS over TLS [fedora-all]↗2019-11-12
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Bugzilla
CVE-2018-21029 systemd: incorrect certificate validation results in acceptance of any certificate signed by a trusted certificate authority for DNS over TLS↗2019-11-12
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