CVEvulnerability

CVE-2023-50868

7.5 HIGH Published 2024-02-14 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2024-02-14
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weaknesses
CWE-400

Description

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.

Affected configurations

• netapp hci baseboard management controller • netapp active iq unified manager • netapp bootstrap os • powerdns recursor (< 4.8.5) • powerdns recursor (>= 4.9.0 < 4.9.3) • powerdns recursor (>= 5.0.0 < 5.0.2) • redhat enterprise linux 6.0 • redhat enterprise linux 7.0 • redhat enterprise linux 8.0 • redhat enterprise linux 8.2 • redhat enterprise linux 8.4 • debian debian linux 10.0 • debian debian linux 11.0 • fedoraproject fedora 38 • fedoraproject fedora 39 • isc bind (>= 9.0.0 < 9.16.48) • isc bind (>= 9.9.3 < 9.16.48) • isc bind (>= 9.18.0 < 9.18.24) • isc bind (>= 9.18.11 < 9.18.24) • isc bind (>= 9.19.0 < 9.19.21)

Related

Weakness · CWE (1)

  • CWE-400 Uncontrolled Resource Consumption weakness

References