U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2023-50868 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].

URL Source(s) Tag(s)
http://www.openwall.com/lists/oss-security/2024/02/16/2 CVE, MITRE Issue Tracking  Mailing List 
http://www.openwall.com/lists/oss-security/2024/02/16/3 CVE, MITRE Issue Tracking  Mailing List 
https://access.redhat.com/security/cve/CVE-2023-50868 CVE, MITRE Vendor Advisory 
https://bugzilla.suse.com/show_bug.cgi?id=1219826 CVE, MITRE Issue Tracking 
https://datatracker.ietf.org/doc/html/rfc5155 CVE, MITRE Technical Description 
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html CVE, MITRE Vendor Advisory 
https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 CVE, MITRE Release Notes 
https://kb.isc.org/docs/cve-2023-50868 CVE, MITRE Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2024/02/msg00006.html CVE, MITRE Mailing List  Vendor Advisory 
https://lists.debian.org/debian-lts-announce/2024/05/msg00011.html CVE, MITRE Mailing List  Vendor Advisory 
https://lists.debian.org/debian-lts-announce/2024/09/msg00001.html CVE Mailing List  Vendor Advisory 
https://lists.debian.org/debian-lts-announce/2024/11/msg00035.html CVE Mailing List  Vendor Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6FV5O347JTX7P5OZA6NGO4MKTXRXMKOZ/ CVE, MITRE Mailing List  Vendor Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/ CVE, MITRE Mailing List  Vendor Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/ CVE, MITRE Mailing List  Vendor Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGSLGKUAQTW5JPPZCMF5YPEYALLRUZZ6/ CVE, MITRE Mailing List  Vendor Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ CVE, MITRE Mailing List  Vendor Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/ CVE, MITRE Mailing List  Vendor Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/ CVE, MITRE Mailing List  Vendor Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TEXGOYGW7DBS3N2QSSQONZ4ENIRQEAPG/ CVE, MITRE Mailing List  Vendor Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQESRWMJCF4JEYJEAKLRM6CT55GLJAB7/ CVE, MITRE Mailing List  Vendor Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/ CVE, MITRE Mailing List  Vendor Advisory 
https://lists.fedoraproject.org/archives/list/[email protected]/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/ CVE Mailing List  Vendor Advisory 
https://lists.fedoraproject.org/archives/list/[email protected]/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/ CVE Mailing List  Vendor Advisory 
https://lists.fedoraproject.org/archives/list/[email protected]/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/ CVE Mailing List  Vendor Advisory 
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html CVE, MITRE Mailing List  Release Notes 
https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ CVE, MITRE Release Notes 
https://security.netapp.com/advisory/ntap-20240307-0008/ CVE, MITRE Vendor Advisory 
https://www.isc.org/blogs/2024-bind-security-release/ CVE, MITRE Exploit  Mitigation  Press/Media Coverage 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-400 Uncontrolled Resource Consumption CISA-ADP  

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

21 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-50868
NVD Published Date:
02/14/2024
NVD Last Modified:
12/23/2025
Source:
MITRE