CVE-2023-50387

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
http://www.openwall.com/lists/oss-security/2024/02/16/2 Mailing List
http://www.openwall.com/lists/oss-security/2024/02/16/3 Mailing List
https://access.redhat.com/security/cve/CVE-2023-50387 Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1219823 Issue Tracking
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html Third Party Advisory
https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 Patch
https://kb.isc.org/docs/cve-2023-50387 Third Party Advisory VDB Entry
https://lists.debian.org/debian-lts-announce/2024/02/msg00006.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6FV5O347JTX7P5OZA6NGO4MKTXRXMKOZ/
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/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/
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/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ Mailing List
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/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/ Mailing List
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/UQESRWMJCF4JEYJEAKLRM6CT55GLJAB7/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html Mailing List Third Party Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387 Patch Vendor Advisory
https://news.ycombinator.com/item?id=39367411 Third Party Advisory
https://news.ycombinator.com/item?id=39372384 Issue Tracking
https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ Vendor Advisory
https://security.netapp.com/advisory/ntap-20240307-0007/
https://www.athene-center.de/aktuelles/key-trap Third Party Advisory
https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf Technical Description Third Party Advisory
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 Third Party Advisory
https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/ Patch Third Party Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022_23h2:-:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*

Configuration 4 (hide)

cpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*

Configuration 5 (hide)

cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*

Configuration 6 (hide)

OR cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*

Configuration 7 (hide)

OR cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*

Configuration 8 (hide)

cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:*
History

07 Mar 2024, 17:15

Type Values Removed Values Added
References
  • () https://security.netapp.com/advisory/ntap-20240307-0007/ -

04 Mar 2024, 03:15

Type Values Removed Values Added
References
  • () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/ -

29 Feb 2024, 03:15

Type Values Removed Values Added
References
  • () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6FV5O347JTX7P5OZA6NGO4MKTXRXMKOZ/ -
  • () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGSLGKUAQTW5JPPZCMF5YPEYALLRUZZ6/ -

26 Feb 2024, 16:27

Type Values Removed Values Added
References
  • () 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/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/ -

23 Feb 2024, 02:15

Type Values Removed Values Added
References
  • () 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/UQESRWMJCF4JEYJEAKLRM6CT55GLJAB7/ -

21 Feb 2024, 13:15

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2024/02/msg00006.html -

20 Feb 2024, 16:55

Type Values Removed Values Added
CWE CWE-770
References () http://www.openwall.com/lists/oss-security/2024/02/16/2 - () http://www.openwall.com/lists/oss-security/2024/02/16/2 - Mailing List
References () http://www.openwall.com/lists/oss-security/2024/02/16/3 - () http://www.openwall.com/lists/oss-security/2024/02/16/3 - Mailing List
References () https://access.redhat.com/security/cve/CVE-2023-50387 - () https://access.redhat.com/security/cve/CVE-2023-50387 - Third Party Advisory
References () https://bugzilla.suse.com/show_bug.cgi?id=1219823 - () https://bugzilla.suse.com/show_bug.cgi?id=1219823 - Issue Tracking
References () https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html - () https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html - Third Party Advisory
References () https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 - () https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 - Patch
References () https://kb.isc.org/docs/cve-2023-50387 - () https://kb.isc.org/docs/cve-2023-50387 - Third Party Advisory, VDB Entry
References () 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/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/ - Mailing List
References () 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/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ - Mailing List
References () 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/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/ - Mailing List
References () https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html - () https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html - Mailing List, Third Party Advisory
References () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387 - () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387 - Patch, Vendor Advisory
References () https://news.ycombinator.com/item?id=39367411 - () https://news.ycombinator.com/item?id=39367411 - Third Party Advisory
References () https://news.ycombinator.com/item?id=39372384 - () https://news.ycombinator.com/item?id=39372384 - Issue Tracking
References () https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ - () https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ - Vendor Advisory
References () https://www.athene-center.de/aktuelles/key-trap - () https://www.athene-center.de/aktuelles/key-trap - Third Party Advisory
References () https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf - () https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf - Technical Description, Third Party Advisory
References () https://www.isc.org/blogs/2024-bind-security-release/ - () https://www.isc.org/blogs/2024-bind-security-release/ - Third Party Advisory
References () https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/ - () https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/ - Press/Media Coverage, Third Party Advisory
References () https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/ - () https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/ - Patch, Third Party Advisory
CPE cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022_23h2:-:*:*:*:*:*:*:*
cpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
First Time Redhat enterprise Linux
Nlnetlabs unbound
Microsoft windows Server 2008
Nic
Fedoraproject fedora
Thekelleys dnsmasq
Fedoraproject
Nic knot Resolver
Powerdns recursor
Thekelleys
Microsoft windows Server 2019
Isc
Redhat
Isc bind
Microsoft windows Server 2022
Microsoft windows Server 2016
Powerdns
Microsoft windows Server 2022 23h2
Microsoft windows Server 2012
Nlnetlabs
Microsoft
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5

19 Feb 2024, 03:15

Type Values Removed Values Added
References
  • () 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/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ -

18 Feb 2024, 02:15

Type Values Removed Values Added
References
  • () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/ -

16 Feb 2024, 21:15

Type Values Removed Values Added
References
  • () http://www.openwall.com/lists/oss-security/2024/02/16/3 -

16 Feb 2024, 20:15

Type Values Removed Values Added
References
  • () http://www.openwall.com/lists/oss-security/2024/02/16/2 -

15 Feb 2024, 19:15

Type Values Removed Values Added
References
  • {'url': 'https://datatracker.ietf.org/doc/html/rfc4035', 'source': 'cve@mitre.org'}
  • () https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf -
Summary
  • (es) Ciertos aspectos DNSSEC del protocolo DNS (en RFC 4035 y RFC relacionados) permiten a atacantes remotos provocar una denegación de servicio (consumo de CPU) a través de una o más respuestas DNSSEC cuando hay una zona con muchos registros DNSKEY y RRSIG, también conocido como "KeyTrap". " asunto. La especificación del protocolo implica que un algoritmo debe evaluar todas las combinaciones de registros DNSKEY y RRSIG.
Summary (en) Certain DNSSEC aspects of the DNS protocol (in RFC 4035 and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses when there is a zone with many DNSKEY and RRSIG records, aka the "KeyTrap" issue. The protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records. (en) 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.

15 Feb 2024, 01:15

Type Values Removed Values Added
References
  • () https://access.redhat.com/security/cve/CVE-2023-50387 -
  • () https://bugzilla.suse.com/show_bug.cgi?id=1219823 -
  • () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387 -

15 Feb 2024, 00:15

Type Values Removed Values Added
References
  • () https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 -
  • () https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html -

14 Feb 2024, 20:15

Type Values Removed Values Added
References
  • () https://news.ycombinator.com/item?id=39372384 -

14 Feb 2024, 18:04

Type Values Removed Values Added
New CVE
Information

Published : 2024-02-14 16:15

Updated : 2024-03-07 17:15

NVD link : CVE-2023-50387

Mitre link : CVE-2023-50387

CVE.ORG link : CVE-2023-50387

JSON object : View

Products Affected

thekelleys

  • dnsmasq

redhat

  • enterprise_linux

fedoraproject

  • fedora

nic

  • knot_resolver

nlnetlabs

  • unbound

microsoft

  • windows_server_2008
  • windows_server_2022
  • windows_server_2022_23h2
  • windows_server_2012
  • windows_server_2016
  • windows_server_2019

isc

  • bind

powerdns

  • recursor
CWE
CWE-770

Allocation of Resources Without Limits or Throttling