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Mend.io Vulnerability Database

CVE-2023-50387

Date: February 13, 2024

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.

Language: C

Severity Score

7.5

Related Resources (36)

Url: https://security.alpinelinux.org/vuln/CVE-2023-50387

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

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

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

Url: https://bugzilla.suse.com/show_bug.cgi?id=1219823

Url: https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf

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

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

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

Url: https://news.ycombinator.com/item?id=39367411

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

Url: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387

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

Url: https://nvd.nist.gov/vuln/detail/CVE-2023-50387

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

Url: https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/

Url: https://security-tracker.debian.org/tracker/CVE-2023-50387

Url: https://datatracker.ietf.org/doc/html/rfc4035

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

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

Url: https://access.redhat.com/security/cve/CVE-2023-50387

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

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

Url: https://kb.isc.org/docs/cve-2023-50387

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

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

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

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

Url: https://www.athene-center.de/aktuelles/key-trap

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

Url: https://news.ycombinator.com/item?id=39372384

Url: https://github.com/isc-projects/bind9/commit/435787efa3189a4b3b0705d1a6d0339cc5b60162

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

Url: https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/

Url: https://security.netapp.com/advisory/ntap-20240307-0007/

Url: https://www.mend.io/vulnerability-database/CVE-2023-50387

Severity Score

7.5

Weakness Type (CWE)

Allocation of Resources Without Limits or Throttling

CWE-770

CVSS v3.1

Base Score:	7.5
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	HIGH

Mend.io Vulnerability Database

We found results for “”

CVE-2023-50387

Date: February 13, 2024

Language: C

Severity Score

Related Resources (36)

Severity Score

Weakness Type (CWE)

CVSS v3.1

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