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›vulnerability›CVE-2023-50387
Name
CVE-2023-50387
Source
NVD ( link)Debian ( link)
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.
CWEs
CWE-770 CWE-770
Published Date
Updated Date
Workaround
-
Advisories
http://www.openwall.com/lists/oss-security/2024/02/16/2Mailing List
http://www.openwall.com/lists/oss-security/2024/02/16/3Mailing List
https://access.redhat.com/security/cve/CVE-2023-50387Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1219823Issue Tracking
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.htmlThird Party Advisory
https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1Patch
https://kb.isc.org/docs/cve-2023-50387VDB Entry
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/Mailing List
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.htmlMailing List
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387Patch
https://news.ycombinator.com/item?id=39367411Third Party Advisory
https://news.ycombinator.com/item?id=39372384Issue Tracking
https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/Vendor Advisory
https://www.athene-center.de/aktuelles/key-trapThird Party Advisory
https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdfTechnical Description
https://www.isc.org/blogs/2024-bind-security-release/Third Party Advisory
https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/Press/Media Coverage
https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/Patch
http://www.openwall.com/lists/oss-security/2024/02/16/2Mailing List
http://www.openwall.com/lists/oss-security/2024/02/16/3Mailing List
https://access.redhat.com/security/cve/CVE-2023-50387Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1219823Issue Tracking
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.htmlThird Party Advisory
https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1Patch
https://kb.isc.org/docs/cve-2023-50387VDB Entry
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/Mailing List
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.htmlMailing List
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387Patch
https://news.ycombinator.com/item?id=39367411Third Party Advisory
https://news.ycombinator.com/item?id=39372384Issue Tracking
https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/Vendor Advisory
https://www.athene-center.de/aktuelles/key-trapThird Party Advisory
https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdfTechnical Description
https://www.isc.org/blogs/2024-bind-security-release/Third Party Advisory
https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/Press/Media Coverage
https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/Patch

Analysis#

Affected Component
Analysis
unbound
Exploitable

Vulnerability Ratings#

7.5
CVSSv31
7.5
CVSSv31
NaN
other

Others affected components#

Name
Project
Project Version
Version
Status
unbound
buildroot
2025.02.x
1.25.1
Not Affected
unbound
buildroot
master
1.25.1
Not Affected
unbound
openwrt
master
1.25.1-r1
Not Affected
unbound
openwrt
openwrt-25.12
1.25.1-r1
Not Affected
unbound
yocto
master
1.25.1
Not Affected
unbound
yocto
scarthgap
1.19.3
Not Affected