CVE-2023-50868
Apache DNS NSEC3 Denial of Service Vulnerability
Description
The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.
INFO
Published Date :
Feb. 14, 2024, 4:15 p.m.
Last Modified :
Nov. 21, 2024, 8:37 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
Exploitability Score :
Public PoC/Exploit Available at Github
CVE-2023-50868 has a 8 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-2023-50868
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.
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-2023-50868.
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).
None
Dockerfile Roff Java
None
Dockerfile Python HTML
None
HCL
This project generates DNS zonefiles with custom NSEC3 parameters to reproduce and evaluate the attacks in CVE-2023-50868.
Python Dockerfile
None
Python
None
asp-net-core csharp docker dockerfile javascript react webapi docker-compose
C# Dockerfile HTML JavaScript CSS
None
Shell
test dnssec ( hackingyseguridad.com )
dnssec test check pruebas dns edns
Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-50868 vulnerability anywhere in the article.
-
RIPE Labs
Zeros Are Heroes: NSEC3 Parameter Settings in the Wild
Hashed authenticated denial of existence appeared back in 2008 to prevent DNS zone walking. Since then, best practices have changed and were updated in RFC 9276. This article examines how the current ... Read more
-
TheCyberThrone
Microsoft Patch Tuesday – October 2024
Microsoft patched 117 CVEs in October 2024 Patch Tuesday release, with three rated critical, 113 rated important and one rated moderate.27 Elevation of Privilege vulnerabilities7 Security Feature Bypa ... Read more
The following table lists the changes that have been made to the
CVE-2023-50868 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-2023-50868 Added Reference https://bugzilla.suse.com/show_bug.cgi?id=1219826 Added Reference https://datatracker.ietf.org/doc/html/rfc5155 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-2023-50868 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://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ Added Reference https://security.netapp.com/advisory/ntap-20240307-0008/ Added Reference https://www.isc.org/blogs/2024-bind-security-release/ -
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-20240307-0008/ [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] -
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 Added Reference MITRE https://access.redhat.com/security/cve/CVE-2023-50868 [No types assigned] Added Reference MITRE https://bugzilla.suse.com/show_bug.cgi?id=1219826 [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 Received by [email protected]
Feb. 14, 2024
Action Type Old Value New Value Added Description The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations. Added Reference MITRE https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ [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.isc.org/blogs/2024-bind-security-release/ [No types assigned] Added Reference MITRE https://datatracker.ietf.org/doc/html/rfc5155 [No types assigned] Added Reference MITRE https://kb.isc.org/docs/cve-2023-50868 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-50868 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-2023-50868
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} 0.00%
score
0.13691
percentile