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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2023-50387 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 3.x Severity and Vector Strings:

NIST CVSS score
NIST: NVD
Base Score:  7.5 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

ADP:  CISA-ADP
Base Score:  7.5 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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

Weakness Enumeration

CWE-ID CWE Name Source
CWE-770 Allocation of Resources Without Limits or Throttling cwe source acceptance level NIST   CISA-ADP  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
   Show Matching CPE(s)
 cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
   Show Matching CPE(s)
 cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
   Show Matching CPE(s)
 cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
   Show Matching CPE(s)

Configuration 2 ( hide )
 cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
   Show Matching CPE(s)
 cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
   Show Matching CPE(s)
 cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
   Show Matching CPE(s)
 cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
   Show Matching CPE(s)
 cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
   Show Matching CPE(s)
 cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*
   Show Matching CPE(s)
 cpe:2.3:o:microsoft:windows_server_2022_23h2:-:*:*:*:*:*:*:*
   Show Matching CPE(s)

Configuration 3 ( hide )
 cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
   Show Matching CPE(s)

Configuration 4 ( hide )
 cpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
   Show Matching CPE(s) 		Up to (excluding)
2.90

Configuration 5 ( hide )
 cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*
   Show Matching CPE(s) 		Up to (excluding)
5.71

Configuration 6 ( hide )
 cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
   Show Matching CPE(s) 		From (including)
4.8.0		Up to (excluding)
4.8.6
 cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
   Show Matching CPE(s) 		From (including)
4.9.0		Up to (excluding)
4.9.3
 cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
   Show Matching CPE(s) 		From (including)
5.0.0		Up to (excluding)
5.0.2

Configuration 7 ( hide )
 cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*
   Show Matching CPE(s) 		From (including)
9.0.0		Up to (including)
9.16.46
 cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*
   Show Matching CPE(s) 		From (including)
9.18.0		Up to (including)
9.18.22
 cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*
   Show Matching CPE(s) 		From (including)
9.19.0		Up to (including)
9.19.20

Configuration 8 ( hide )
 cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:*
   Show Matching CPE(s) 		Up to (excluding)
1.19.1

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

20 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-50387
NVD Published Date:
02/14/2024
NVD Last Modified:
05/12/2025
Source:
MITRE