CVE-2023-50868 Affecting unbound-devel package, versions <1.20.0-150600.23.3.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.05% (19th percentile)

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  • Snyk IDSNYK-SLES156-UNBOUNDDEVEL-7210287
  • published5 Jun 2024
  • disclosed4 Jun 2024

Introduced: 4 Jun 2024

CVE-2023-50868  (opens in a new tab)

How to fix?

Upgrade SLES:15.6 unbound-devel to version 1.20.0-150600.23.3.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream unbound-devel package and not the unbound-devel package as distributed by SLES. See How to fix? for SLES:15.6 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