CVE-2023-50868

CVE Details

Release Date:

2024-02-13

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.

See more information about CVE-2023-50868 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	7.5	Base Metrics:	AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Access Vector:	Network	Attack Complexity:	Low
Privileges Required:	None	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (bind)	ELSA-2024-1782	2024-04-11
Oracle Linux version 8 (bind9.16)	ELSA-2024-1781	2024-04-11
Oracle Linux version 8 (dhcp)	ELSA-2024-1782	2024-04-11
Oracle Linux version 8 (dnsmasq)	ELSA-2024-1335	2024-03-15
Oracle Linux version 8 (unbound)	ELSA-2024-0965	2024-02-28
Oracle Linux version 9 (bind)	ELSA-2024-1789	2024-04-11
Oracle Linux version 9 (bind)	ELSA-2024-2551	2024-05-07
Oracle Linux version 9 (bind-dyndb-ldap)	ELSA-2024-1789	2024-04-11
Oracle Linux version 9 (bind-dyndb-ldap)	ELSA-2024-2551	2024-05-07
Oracle Linux version 9 (dnsmasq)	ELSA-2024-1334	2024-03-15
Oracle Linux version 9 (unbound)	ELSA-2024-0977	2024-02-28

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team