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CVE-2023-50868 Affecting systemd package, versions <247.3-7+deb11u6

Severity

 Recommended
low

Based on default assessment until relevant scores are available

    Threat Intelligence

    EPSS
    0.05% (19th percentile)

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  • Snyk ID SNYK-DEBIAN11-SYSTEMD-6277512
  • published 27 Feb 2024
  • disclosed 14 Feb 2024
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Introduced: 14 Feb 2024

CVE-2023-50868 Open this link in a new tab

How to fix?

Upgrade Debian:11 systemd to version 247.3-7+deb11u6 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.

The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.

References

CVSS Scores

version 3.1
Expand this section

Red Hat

7.5 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
Expand this section

SUSE

7.5 high