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CVE details

CVE-2023-50387

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.

Score
7.5 high
Published
2024-02-14
Links
NVD · cve.org

Affected ports (1)

PortPackageVersionStatusMaintainer
dns/knot-resolverknot-resolver5.7.8unaddressedfreebsd@dns.company

VuXML

Template for a VuXML entry

Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.

  <vuln vid="FIXME (make newentry)">
    <topic>FIXME -- FIXME</topic>
    <affects>
      <package>
	<name>knot-resolver</name>
	<range><lt>2.90</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>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.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2023-50387</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2023-50387</url>
    </references>
    <dates>
      <discovery>2024-02-14</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>