Vulnerability Monitor

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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.

Published

2024-02-14T16:15:45.300

Last Modified

2025-05-12T15:15:56.673

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

Weaknesses

Type: Primary
CWE-770
Type: Secondary
CWE-770

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	redhat	enterprise_linux	6.0	Yes
Operating System	redhat	enterprise_linux	7.0	Yes
Operating System	redhat	enterprise_linux	8.0	Yes
Operating System	redhat	enterprise_linux	9.0	Yes
Operating System	microsoft	windows_server_2008	r2	Yes
Operating System	microsoft	windows_server_2012	-	Yes
Operating System	microsoft	windows_server_2012	r2	Yes
Operating System	microsoft	windows_server_2016	-	Yes
Operating System	microsoft	windows_server_2019	-	Yes
Operating System	microsoft	windows_server_2022	-	Yes
Operating System	microsoft	windows_server_2022_23h2	-	Yes
Operating System	fedoraproject	fedora	39	Yes
Application	thekelleys	dnsmasq	< 2.90	Yes
Application	nic	knot_resolver	< 5.71	Yes
Application	powerdns	recursor	< 4.8.6	Yes
Application	powerdns	recursor	< 4.9.3	Yes
Application	powerdns	recursor	< 5.0.2	Yes
Application	isc	bind	≤ 9.16.46	Yes
Application	isc	bind	≤ 9.18.22	Yes
Application	isc	bind	≤ 9.19.20	Yes
Application	nlnetlabs	unbound	< 1.19.1	Yes

References

http://www.openwall.com/lists/oss-security/2024/02/16/2 Mailing List ([email protected])
http://www.openwall.com/lists/oss-security/2024/02/16/3 Mailing List ([email protected])
https://access.redhat.com/security/cve/CVE-2023-50387 Third Party Advisory ([email protected])
https://bugzilla.suse.com/show_bug.cgi?id=1219823 Issue Tracking ([email protected])
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html Third Party Advisory ([email protected])
https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 Patch ([email protected])
https://kb.isc.org/docs/cve-2023-50387 Third Party Advisory, VDB Entry ([email protected])
https://lists.debian.org/debian-lts-announce/2024/02/msg00006.html ([email protected])
https://lists.debian.org/debian-lts-announce/2024/05/msg00011.html ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6FV5O347JTX7P5OZA6NGO4MKTXRXMKOZ/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/ Mailing List ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGSLGKUAQTW5JPPZCMF5YPEYALLRUZZ6/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ Mailing List ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/ Mailing List ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TEXGOYGW7DBS3N2QSSQONZ4ENIRQEAPG/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQESRWMJCF4JEYJEAKLRM6CT55GLJAB7/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/ ([email protected])
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html Mailing List, Third Party Advisory ([email protected])
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387 Patch, Vendor Advisory ([email protected])
https://news.ycombinator.com/item?id=39367411 Third Party Advisory ([email protected])
https://news.ycombinator.com/item?id=39372384 Issue Tracking ([email protected])
https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ Vendor Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20240307-0007/ ([email protected])
https://www.athene-center.de/aktuelles/key-trap Third Party Advisory ([email protected])
https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf Technical Description, Third Party Advisory ([email protected])
https://www.isc.org/blogs/2024-bind-security-release/ Third Party Advisory ([email protected])
https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/ Press/Media Coverage, Third Party Advisory ([email protected])
https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/ Patch, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2024/02/16/2 Mailing List (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/02/16/3 Mailing List (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/security/cve/CVE-2023-50387 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.suse.com/show_bug.cgi?id=1219823 Issue Tracking (af854a3a-2127-422b-91ae-364da2661108)
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 Patch (af854a3a-2127-422b-91ae-364da2661108)
https://kb.isc.org/docs/cve-2023-50387 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2024/02/msg00006.html (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2024/05/msg00011.html (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6FV5O347JTX7P5OZA6NGO4MKTXRXMKOZ/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/ Mailing List (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGSLGKUAQTW5JPPZCMF5YPEYALLRUZZ6/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ Mailing List (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/ Mailing List (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TEXGOYGW7DBS3N2QSSQONZ4ENIRQEAPG/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQESRWMJCF4JEYJEAKLRM6CT55GLJAB7/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://news.ycombinator.com/item?id=39367411 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://news.ycombinator.com/item?id=39372384 Issue Tracking (af854a3a-2127-422b-91ae-364da2661108)
https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20240307-0007/ (af854a3a-2127-422b-91ae-364da2661108)
https://www.athene-center.de/aktuelles/key-trap Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf Technical Description, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.isc.org/blogs/2024-bind-security-release/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/ Press/Media Coverage, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/ Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)