7.5
HIGH
CVE-2023-50387
BIND DNSSEC CPU Denial of Service Vulnerability
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.

INFO

Published Date :

Feb. 14, 2024, 4:15 p.m.

Last Modified :

Nov. 21, 2024, 8:36 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2023-50387 has a 14 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2023-50387 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Microsoft windows_server_2008
2 Microsoft windows_server_2012
3 Microsoft windows_server_2016
4 Microsoft windows_server_2019
5 Microsoft windows_server_2022
6 Microsoft windows_server_2022_23h2
1 Redhat enterprise_linux
1 Fedoraproject fedora
1 Powerdns recursor
1 Isc bind
1 Nic knot_resolver
1 Nlnetlabs unbound
1 Thekelleys dnsmasq
: Total Affected Vendor : 8 | Products : 13
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-50387.

URL 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.debian.org/debian-lts-announce/2024/05/msg00011.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
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.debian.org/debian-lts-announce/2024/05/msg00011.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

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
krlabs/dnsbind-vulnerabilities

DNS Bind Vulnerabilities list

bind cve dns-server vulnerabilities

Updated: 1 week, 1 day ago
0 stars 0 fork 0 watcher
Born at : Dec. 13, 2024, 12:48 p.m. This repo has been linked 26 different CVEs too.
Profile Photo
Pablodiz/CVE-2023-50387

None

Dockerfile Python Shell

Updated: 2 weeks, 3 days ago
0 stars 0 fork 0 watcher
Born at : Dec. 4, 2024, 11:27 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
Pablodiz/Pablodiz

None

Updated: 1 week, 6 days ago
0 stars 0 fork 0 watcher
Born at : Nov. 26, 2024, 3:57 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
appatalks/ghes-cve-check

Automate investigating CVE Look-ups against GitHub Enterprise Server (GHES)

check cve ghes

Updated: 4 weeks ago
1 stars 0 fork 0 watcher
Born at : Nov. 8, 2024, 2:13 p.m. This repo has been linked 6 different CVEs too.
Profile Photo
Srinu-rj/spring-food-app

None

Dockerfile Roff Java

Updated: 2 months, 1 week ago
0 stars 0 fork 0 watcher
Born at : Oct. 7, 2024, 8:52 a.m. This repo has been linked 127 different CVEs too.
Profile Photo
Atamik03/API-calc-dz

None

Dockerfile Python HTML

Updated: 2 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Sept. 26, 2024, 4:44 p.m. This repo has been linked 26 different CVEs too.
Profile Photo
Meirelez/SSR-DNSSEC

In this repository you can find the files used to try to produce a POC for the CVE-2023-50387

Shell Python

Updated: 6 months, 4 weeks ago
0 stars 1 fork 1 watcher
Born at : May 23, 2024, 2:41 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
GrigGM/05-virt-04-docker-hw

None

HCL

Updated: 7 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : April 30, 2024, 7:53 p.m. This repo has been linked 54 different CVEs too.
Profile Photo
grcbit/grc4ciso

grc4ciso integrates Governance, Risk, and Compliance (GRC), Extended Detection and Response (XDR), Zero Trust, and GPT-4 cybersecurity capabilities into a unified Software-as-a-Service (SaaS) platform

Updated: 1 month, 2 weeks ago
2 stars 0 fork 0 watcher
Born at : April 13, 2024, 7:05 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
fokypoky/places-list

None

asp-net-core csharp docker dockerfile javascript react webapi docker-compose

C# Dockerfile HTML JavaScript CSS

Updated: 8 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Feb. 22, 2024, 6:42 p.m. This repo has been linked 383 different CVEs too.
Profile Photo
knqyf263/CVE-2023-50387

KeyTrap (DNSSEC)

Dockerfile Python

Updated: 1 month, 3 weeks ago
41 stars 11 fork 11 watcher
Born at : Feb. 18, 2024, 9:50 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
giterlizzi/secdb-feeds

SecDB

Updated: 3 months, 3 weeks ago
0 stars 0 fork 0 watcher
Born at : July 1, 2022, 8:37 p.m. This repo has been linked 82 different CVEs too.
Profile Photo
GitHubForSnap/knot-resolver-gael

None

Shell

Updated: 1 month ago
0 stars 0 fork 0 watcher
Born at : March 6, 2021, 2:09 p.m. This repo has been linked 5 different CVEs too.
Profile Photo
hackingyseguridad/dnssec

test dnssec ( hackingyseguridad.com )

dnssec test check pruebas dns edns

Shell

Updated: 3 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Jan. 6, 2019, 8:37 p.m. This repo has been linked 2 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-50387 vulnerability anywhere in the article.

  • Cybersecurity News
Microsoft Boosts Email Security with General Availability of Inbound SMTP DANE with DNSSEC

Microsoft announced the general availability of Inbound SMTP DANE with DNSSEC for Exchange Online, marking a significant step forward in email security. This powerful feature combines two robust secur ... Read more

Published Date: Oct 30, 2024 (1 month, 3 weeks ago)
CVE-2024-45844 CVE-2024-47830 CVE-2024-37383 CVE-2024-29824 CVE-2024-4783 CVE-2023-52447 CVE-2023-50387 CVE-2023-27532

The following table lists the changes that have been made to the CVE-2023-50387 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2024/02/16/2
    Added Reference http://www.openwall.com/lists/oss-security/2024/02/16/3
    Added Reference https://access.redhat.com/security/cve/CVE-2023-50387
    Added Reference https://bugzilla.suse.com/show_bug.cgi?id=1219823
    Added Reference https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html
    Added Reference https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1
    Added Reference https://kb.isc.org/docs/cve-2023-50387
    Added Reference https://lists.debian.org/debian-lts-announce/2024/02/msg00006.html
    Added Reference https://lists.debian.org/debian-lts-announce/2024/05/msg00011.html
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6FV5O347JTX7P5OZA6NGO4MKTXRXMKOZ/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGSLGKUAQTW5JPPZCMF5YPEYALLRUZZ6/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TEXGOYGW7DBS3N2QSSQONZ4ENIRQEAPG/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQESRWMJCF4JEYJEAKLRM6CT55GLJAB7/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/
    Added Reference https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html
    Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387
    Added Reference https://news.ycombinator.com/item?id=39367411
    Added Reference https://news.ycombinator.com/item?id=39372384
    Added Reference https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/
    Added Reference https://security.netapp.com/advisory/ntap-20240307-0007/
    Added Reference https://www.athene-center.de/aktuelles/key-trap
    Added Reference https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf
    Added Reference https://www.isc.org/blogs/2024-bind-security-release/
    Added Reference https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/
    Added Reference https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/
  • CVE Modified by [email protected]

    Jun. 10, 2024

    Action Type Old Value New Value
    Added Reference MITRE https://lists.debian.org/debian-lts-announce/2024/05/msg00011.html [No types assigned]
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Mar. 07, 2024

    Action Type Old Value New Value
    Added Reference MITRE https://security.netapp.com/advisory/ntap-20240307-0007/ [No types assigned]
  • CVE Modified by [email protected]

    Mar. 04, 2024

    Action Type Old Value New Value
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/ [No types assigned]
  • CVE Modified by [email protected]

    Feb. 29, 2024

    Action Type Old Value New Value
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6FV5O347JTX7P5OZA6NGO4MKTXRXMKOZ/ [No types assigned]
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGSLGKUAQTW5JPPZCMF5YPEYALLRUZZ6/ [No types assigned]
  • CVE Modified by [email protected]

    Feb. 26, 2024

    Action Type Old Value New Value
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/ [No types assigned]
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/ [No types assigned]
  • CVE Modified by [email protected]

    Feb. 23, 2024

    Action Type Old Value New Value
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TEXGOYGW7DBS3N2QSSQONZ4ENIRQEAPG/ [No types assigned]
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQESRWMJCF4JEYJEAKLRM6CT55GLJAB7/ [No types assigned]
  • CVE Modified by [email protected]

    Feb. 21, 2024

    Action Type Old Value New Value
    Added Reference MITRE https://lists.debian.org/debian-lts-announce/2024/02/msg00006.html [No types assigned]
  • Initial Analysis by [email protected]

    Feb. 20, 2024

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type http://www.openwall.com/lists/oss-security/2024/02/16/2 No Types Assigned http://www.openwall.com/lists/oss-security/2024/02/16/2 Mailing List
    Changed Reference Type http://www.openwall.com/lists/oss-security/2024/02/16/3 No Types Assigned http://www.openwall.com/lists/oss-security/2024/02/16/3 Mailing List
    Changed Reference Type https://access.redhat.com/security/cve/CVE-2023-50387 No Types Assigned https://access.redhat.com/security/cve/CVE-2023-50387 Third Party Advisory
    Changed Reference Type https://bugzilla.suse.com/show_bug.cgi?id=1219823 No Types Assigned https://bugzilla.suse.com/show_bug.cgi?id=1219823 Issue Tracking
    Changed Reference Type https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html No Types Assigned https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html Third Party Advisory
    Changed Reference Type https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 No Types Assigned https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 Patch
    Changed Reference Type https://kb.isc.org/docs/cve-2023-50387 No Types Assigned https://kb.isc.org/docs/cve-2023-50387 Third Party Advisory, VDB Entry
    Changed Reference Type https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/ No Types Assigned https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/ Mailing List
    Changed Reference Type https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ No Types Assigned https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ Mailing List
    Changed Reference Type https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/ No Types Assigned https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/ Mailing List
    Changed Reference Type https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html No Types Assigned https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html Mailing List, Third Party Advisory
    Changed Reference Type https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387 No Types Assigned https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387 Patch, Vendor Advisory
    Changed Reference Type https://news.ycombinator.com/item?id=39367411 No Types Assigned https://news.ycombinator.com/item?id=39367411 Third Party Advisory
    Changed Reference Type https://news.ycombinator.com/item?id=39372384 No Types Assigned https://news.ycombinator.com/item?id=39372384 Issue Tracking
    Changed Reference Type https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ No Types Assigned https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ Vendor Advisory
    Changed Reference Type https://www.athene-center.de/aktuelles/key-trap No Types Assigned https://www.athene-center.de/aktuelles/key-trap Third Party Advisory
    Changed Reference Type https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf No Types Assigned https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf Technical Description, Third Party Advisory
    Changed Reference Type https://www.isc.org/blogs/2024-bind-security-release/ No Types Assigned https://www.isc.org/blogs/2024-bind-security-release/ Third Party Advisory
    Changed Reference Type https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/ No Types Assigned https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/ Press/Media Coverage, Third Party Advisory
    Changed Reference Type https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/ No Types Assigned https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/ Patch, Third Party Advisory
    Added CWE NIST CWE-770
    Added CPE Configuration 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:*:*:*:*:*:*:*
    Added CPE Configuration 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:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:* versions up to (excluding) 2.90
    Added CPE Configuration OR *cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:* versions up to (excluding) 5.71
    Added CPE Configuration OR *cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:* versions from (including) 4.8.0 up to (excluding) 4.8.6 *cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:* versions from (including) 4.9.0 up to (excluding) 4.9.3 *cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:* versions from (including) 5.0.0 up to (excluding) 5.0.2
    Added CPE Configuration OR *cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* versions from (including) 9.0.0 up to (including) 9.16.46 *cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* versions from (including) 9.18.0 up to (including) 9.18.22 *cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* versions from (including) 9.19.0 up to (including) 9.19.20
    Added CPE Configuration OR *cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:* versions up to (excluding) 1.19.1
  • CVE Modified by [email protected]

    Feb. 19, 2024

    Action Type Old Value New Value
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/ [No types assigned]
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ [No types assigned]
  • CVE Modified by [email protected]

    Feb. 18, 2024

    Action Type Old Value New Value
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/ [No types assigned]
  • CVE Modified by [email protected]

    Feb. 16, 2024

    Action Type Old Value New Value
    Added Reference MITRE http://www.openwall.com/lists/oss-security/2024/02/16/3 [No types assigned]
  • CVE Modified by [email protected]

    Feb. 16, 2024

    Action Type Old Value New Value
    Added Reference MITRE http://www.openwall.com/lists/oss-security/2024/02/16/2 [No types assigned]
  • CVE Modified by [email protected]

    Feb. 15, 2024

    Action Type Old Value New Value
    Changed Description 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. 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.
    Added Reference MITRE https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf [No types assigned]
    Removed Reference MITRE https://datatracker.ietf.org/doc/html/rfc4035
  • CVE Modified by [email protected]

    Feb. 15, 2024

    Action Type Old Value New Value
    Added Reference MITRE https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387 [No types assigned]
    Added Reference MITRE https://access.redhat.com/security/cve/CVE-2023-50387 [No types assigned]
    Added Reference MITRE https://bugzilla.suse.com/show_bug.cgi?id=1219823 [No types assigned]
  • CVE Modified by [email protected]

    Feb. 15, 2024

    Action Type Old Value New Value
    Added Reference MITRE https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 [No types assigned]
    Added Reference MITRE https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html [No types assigned]
  • CVE Modified by [email protected]

    Feb. 14, 2024

    Action Type Old Value New Value
    Added Reference MITRE https://news.ycombinator.com/item?id=39372384 [No types assigned]
  • CVE Received by [email protected]

    Feb. 14, 2024

    Action Type Old Value New Value
    Added Description 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.
    Added Reference MITRE https://datatracker.ietf.org/doc/html/rfc4035 [No types assigned]
    Added Reference MITRE https://www.athene-center.de/aktuelles/key-trap [No types assigned]
    Added Reference MITRE https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ [No types assigned]
    Added Reference MITRE https://kb.isc.org/docs/cve-2023-50387 [No types assigned]
    Added Reference MITRE https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html [No types assigned]
    Added Reference MITRE https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/ [No types assigned]
    Added Reference MITRE https://news.ycombinator.com/item?id=39367411 [No types assigned]
    Added Reference MITRE https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/ [No types assigned]
    Added Reference MITRE https://www.isc.org/blogs/2024-bind-security-release/ [No types assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-50387 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-50387 weaknesses.

CAPEC-125: Flooding Flooding CAPEC-130: Excessive Allocation Excessive Allocation CAPEC-147: XML Ping of the Death XML Ping of the Death CAPEC-197: Exponential Data Expansion Exponential Data Expansion CAPEC-229: Serialized Data Parameter Blowup Serialized Data Parameter Blowup CAPEC-230: Serialized Data with Nested Payloads Serialized Data with Nested Payloads CAPEC-231: Oversized Serialized Data Payloads Oversized Serialized Data Payloads CAPEC-469: HTTP DoS HTTP DoS CAPEC-482: TCP Flood TCP Flood CAPEC-486: UDP Flood UDP Flood CAPEC-487: ICMP Flood ICMP Flood CAPEC-488: HTTP Flood HTTP Flood CAPEC-489: SSL Flood SSL Flood CAPEC-490: Amplification Amplification CAPEC-491: Quadratic Data Expansion Quadratic Data Expansion CAPEC-493: SOAP Array Blowup SOAP Array Blowup CAPEC-494: TCP Fragmentation TCP Fragmentation CAPEC-495: UDP Fragmentation UDP Fragmentation CAPEC-496: ICMP Fragmentation ICMP Fragmentation CAPEC-528: XML Flood XML Flood
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

6.75 }} 1.73%

score

0.93779

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: