CVE-2023-50868

Published: Feb 14, 2024Modified: Jun 17, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: NVD

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 (20)

Products: Netapp: Hci Baseboard Management Controller, Active Iq Unified Manager, Bootstrap Os · Powerdns: Recursor · Redhat: Enterprise Linux · +3 more

Show all products

Netapp: Hci Baseboard Management Controller, Active Iq Unified Manager, Bootstrap Os · Powerdns: Recursor · Redhat: Enterprise Linux · Debian: Debian Linux · Fedoraproject: Fedora · Isc: Bind

Netapp

3 products

Hci Baseboard Management Controller

Active Iq Unified Manager

1 product

1 product

1 product

1 product

1 product

Configuration A

1 vulnerable · 5 platform

Vulnerable Software	Affected Versions
Netapp Hci Baseboard Management Controller	All versions

Running on/with	Platform Versions
Netapp H300s	All versions
Netapp H410c	All versions
Netapp H410s	All versions
Netapp H500s	All versions
Netapp H700s	All versions

Configuration B

1 vulnerable

Vulnerable Software	Affected Versions
Netapp Active Iq Unified Manager	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netapp Bootstrap Os	All versions

Running on/with	Platform Versions
Netapp Hci Compute Node	All versions

Configuration D

3 vulnerable

Vulnerable Software	Affected Versions
Powerdns Recursor	Before 4.8.5
Powerdns Recursor	From 4.9.0 to 4.9.3
Powerdns Recursor	From 5.0.0 to 5.0.2

Configuration E

5 vulnerable

Vulnerable Software	Affected Versions
Redhat Enterprise Linux	Version 6.0
Redhat Enterprise Linux	Version 7.0
Redhat Enterprise Linux	Version 8.0
Redhat Enterprise Linux	Version 8.2
Redhat Enterprise Linux	Version 8.4

Configuration F

2 vulnerable

Vulnerable Software	Affected Versions
Debian Debian Linux	Version 10.0
Debian Debian Linux	Version 11.0

Configuration G

2 vulnerable

Vulnerable Software	Affected Versions
Fedoraproject Fedora	Version 38
Fedoraproject Fedora	Version 39

Configuration H

5 vulnerable

Vulnerable Software	Affected Versions
Isc Bind	From 9.0.0 to 9.16.48
Isc Bind	From 9.18.0 to 9.18.24
Isc Bind	From 9.19.0 to 9.19.21
Isc Bind	From 9.9.3 to 9.16.48
Isc Bind	From 9.18.11 to 9.18.24

Related CWEs

CWE-400

Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

References (53)

http://www.openwall.com/lists/oss-security/2024/02/16/2

Source: cve@mitre.org

Issue TrackingMailing List

http://www.openwall.com/lists/oss-security/2024/02/16/3

Source: cve@mitre.org

Issue TrackingMailing List

https://access.redhat.com/security/cve/CVE-2023-50868

Source: cve@mitre.org

Vendor Advisory

https://bugzilla.suse.com/show_bug.cgi?id=1219826

Source: cve@mitre.org

Issue Tracking

https://datatracker.ietf.org/doc/html/rfc5155

Source: cve@mitre.org

Technical Description

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html

Source: cve@mitre.org

Vendor Advisory

https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1

Source: cve@mitre.org

Release Notes

https://kb.isc.org/docs/cve-2023-50868

Source: cve@mitre.org

Third Party Advisory

https://lists.debian.org/debian-lts-announce/2024/02/msg00006.html

Source: cve@mitre.org

Mailing ListVendor Advisory

https://lists.debian.org/debian-lts-announce/2024/05/msg00011.html

Source: cve@mitre.org

Mailing ListVendor Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6FV5O347JTX7P5OZA6NGO4MKTXRXMKOZ/

Source: cve@mitre.org

Mailing ListVendor Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/

Source: cve@mitre.org

Mailing ListVendor Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/

Source: cve@mitre.org

Mailing ListVendor Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGSLGKUAQTW5JPPZCMF5YPEYALLRUZZ6/

Source: cve@mitre.org

Mailing ListVendor Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/

Source: cve@mitre.org

Mailing ListVendor Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/

Source: cve@mitre.org

Mailing ListVendor Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/

Source: cve@mitre.org

Mailing ListVendor Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TEXGOYGW7DBS3N2QSSQONZ4ENIRQEAPG/

Source: cve@mitre.org

Mailing ListVendor Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQESRWMJCF4JEYJEAKLRM6CT55GLJAB7/

Source: cve@mitre.org

Mailing ListVendor Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/

Source: cve@mitre.org

Mailing ListVendor Advisory

https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html

Source: cve@mitre.org

Mailing ListRelease Notes

https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/

Source: cve@mitre.org

Release Notes

https://security.netapp.com/advisory/ntap-20240307-0008/

Source: cve@mitre.org

Vendor Advisory

https://www.isc.org/blogs/2024-bind-security-release/

Source: cve@mitre.org

ExploitMitigationPress/Media Coverage

http://www.openwall.com/lists/oss-security/2024/02/16/2