{ "dataType": "CVE_RECORD", "cveMetadata": { "state": "PUBLISHED", "cveId": "CVE-2023-50387", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2025-11-04T18:20:34.949Z", "dateReserved": "2023-12-07T00:00:00.000Z", "datePublished": "2024-02-14T00:00:00.000Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2024-06-10T16:14:16.780Z" }, "descriptions": [ { "lang": "en", "value": "Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the \"KeyTrap\" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records." } ], "affected": [ { "vendor": "n/a", "product": "n/a", "versions": [ { "version": "n/a", "status": "affected" } ] } ], "references": [ { "url": "https://www.athene-center.de/aktuelles/key-trap" }, { "url": "https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/" }, { "url": "https://kb.isc.org/docs/cve-2023-50387" }, { "url": "https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html" }, { "url": "https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/" }, { "url": "https://news.ycombinator.com/item?id=39367411" }, { "url": "https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/" }, { "url": "https://www.isc.org/blogs/2024-bind-security-release/" }, { "url": "https://news.ycombinator.com/item?id=39372384" }, { "url": "https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1" }, { "url": "https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html" }, { "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387" }, { "url": "https://access.redhat.com/security/cve/CVE-2023-50387" }, { "url": "https://bugzilla.suse.com/show_bug.cgi?id=1219823" }, { "url": "https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf" }, { "name": "[oss-security] 20240216 Re: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilities", "tags": [ "mailing-list" ], "url": "http://www.openwall.com/lists/oss-security/2024/02/16/2" }, { "name": "[oss-security] 20240216 Re: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilities", "tags": [ "mailing-list" ], "url": "http://www.openwall.com/lists/oss-security/2024/02/16/3" }, { "name": 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