CVE-2023-50387

Description

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.

References

https://www.cisa.gov/news-events/ics-advisories/icsa-24-319-08

https://www.darkreading.com/vulnerabilities-threats/microsoft-late-dangerous-dnssec-zero-day-flaw

https://www.darkreading.com/cloud-security/keytrap-dns-bug-threatens-widespread-internet-outages

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3