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

Severity

low

    Threat Intelligence

    EPSS
    0.82% (82nd percentile)

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  • Snyk ID SNYK-DEBIAN12-SYSTEMD-1560556
  • published 3 Nov 2019
  • disclosed 30 Oct 2019
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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:12 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:12 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
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Snyk

9.8 low
  • 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
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NVD

9.8 critical
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Red Hat

6.3 medium