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CVE-2023-50387

🗓️ 14 Feb 2024 00:00:00Reported by mitreType 
cve
 cve🔗 web.nvd.nist.gov📰️ 3 Media mentions👁 3141 Views

Certain DNSSEC aspects of the DNS protocol allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses when there is a zone with many DNSKEY and RRSIG records, aka the "KeyTrap" issue

Related
Detection
Refs
Social
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: IBM Watson Speech Services Cartridge for IBM Cloud Pak for Data is vulnerable to a denial of service in ISC BIND [CVE-2023-50387]
20 Jun 202418:07
–ibm
IBM Security Bulletins		Security Bulletin: Vulnerabilities in bind and dnsmasq affect IBM SAN Volume Controller, IBM Storwize, IBM Spectrum Virtualize and IBM FlashSystem products
26 Feb 202515:47
–ibm
IBM Security Bulletins		Security Bulletin: AIX is vulnerable to denial of service due to ISC BIND
5 Jun 202416:04
–ibm
IBM Security Bulletins		Security Bulletin: IBM QRadar SIEM contains multiple vulnerabilities
6 Jun 202414:36
–ibm
IBM Security Bulletins		Security Bulletin: IBM Technical Support Appliance - possible excessive CPU usage or denial of service
21 Nov 202421:46
–ibm
IBM Security Bulletins		Security Bulletin: IBM Observability with Instana using third-party Kubernetes Operators is affected by Multiple Security Vulnerabilities
13 Jun 202406:21
–ibm
IBM Security Bulletins		Security Bulletin: Vulnerability in BIND affects IBM Integrated Analytics System [CVE-2023-50387]
14 Nov 202417:28
–ibm
IBM Security Bulletins		Security Bulletin: Vulnerabilities in libmaxminddb, dnsmasq and bind affect IBM SAN Volume Controller, IBM Storwize, IBM Spectrum Virtualize and IBM FlashSystem product
24 Sep 202409:01
–ibm
FreeBSD		DNSSEC validators -- denial-of-service/CPU exhaustion from KeyTrap and NSEC3 vulnerabilities
6 Feb 202400:00
–freebsd
FreeBSD		powerdns-recursor -- Multiple Vulnerabilities
14 Feb 202400:00
–freebsd
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NVD
Node
redhatenterprise_linuxMatch6.0
OR
redhatenterprise_linuxMatch7.0
OR
redhatenterprise_linuxMatch8.0
OR
redhatenterprise_linuxMatch9.0
Node
microsoftwindows_server_2008Matchr2sp1x64
OR
microsoftwindows_server_2012Match-
OR
microsoftwindows_server_2012Matchr2
OR
microsoftwindows_server_2016Match-
OR
microsoftwindows_server_2019Match-
OR
microsoftwindows_server_2022Match-
OR
microsoftwindows_server_2022_23h2Match-
Node
fedoraprojectfedoraMatch39
Node
thekelleysdnsmasqRange<2.90
Node
nicknot_resolverRange<5.71
Node
powerdnsrecursorRange4.8.0–4.8.6
OR
powerdnsrecursorRange4.9.0–4.9.3
OR
powerdnsrecursorRange5.0.0–5.0.2
Node
iscbindRange9.0.0–9.16.46-
OR
iscbindRange9.18.0–9.18.22-
OR
iscbindRange9.19.0–9.19.20-
Node
nlnetlabsunboundRange<1.19.1
SourceLink
nlnetlabswww.nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/
listswww.lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/
listswww.lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQESRWMJCF4JEYJEAKLRM6CT55GLJAB7/
listswww.lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGSLGKUAQTW5JPPZCMF5YPEYALLRUZZ6/
listswww.lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/
openwallwww.openwall.com/lists/oss-security/2024/02/16/3
athene-centerwww.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf
listswww.lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/
securityweekwww.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/
accesswww.access.redhat.com/security/cve/CVE-2023-50387
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04 Nov 2025 19:16Current
7.7High risk
Vulners AI Score7.7
CVSS 3.17.5
EPSS0.43701
SSVC
CWE-770
dnssecdns protocolrfc 4035denial of servicecpu consumptionkeytrapalgorithm evaluationnvdcve-2023-50387
3141