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Improper Certificate Validation Affecting systemd package, versions <244-1

Severity

 Recommended
low

Based on Debian security rating

    Threat Intelligence

    EPSS
    0.84% (83rd percentile)

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  • Snyk ID SNYK-DEBIAN11-SYSTEMD-530524
  • published 3 Nov 2019
  • disclosed 30 Oct 2019
Report a new vulnerability Found a mistake?

Introduced: 30 Oct 2019

CVE-2018-21029 Open this link in a new tab
CWE-295 Open this link in a new tab

How to fix?

Upgrade Debian:11 systemd to version 244-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

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)

References

CVSS Scores

version 3.1
Expand this section

NVD

9.8 critical
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High