CVE-2023-50868 Affecting bind package, versions <9.18.24-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.05% (19th percentile)

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  • Snyk IDSNYK-ALPINE319-BIND-6245485
  • published14 Feb 2024
  • disclosed14 Feb 2024

Introduced: 14 Feb 2024

CVE-2023-50868  (opens in a new tab)

How to fix?

Upgrade Alpine:3.19 bind to version 9.18.24-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bind package and not the bind package as distributed by Alpine. See How to fix? for Alpine:3.19 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