CVE-2023-29552

Service Location Protocol (SLP) Denial-of-Service Vulnerability

High 7.5
Exploited: added to CISA KEV 8 Nov 2023

Description

The Service Location Protocol (SLP, RFC 2608) allows an unauthenticated, remote attacker to register arbitrary services. This could allow the attacker to use spoofed UDP traffic to conduct a denial-of-service attack with a significant amplification factor.

Key facts

Published: 25 Apr 2023
Last changed: 21 Oct 2025
Assigned by: mitre
KEV added: 8 Nov 2023
KEV fix due: 29 Nov 2023
EPSS: 63.975% likely to be exploited in the next 30 days, higher than 99.238% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: active; Automatable: yes; Technical impact: partial

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

7.5CVSS 3.1, Highfrom CISA (ADP container)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What to do

Apply mitigations per vendor instructions or disable SLP service or port 427/UDP on all systems running on untrusted networks, including those directly connected to the Internet.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
n/a	n/a	n/a (affected)

Timeline

25 Apr 2023 Published
8 Nov 2023 CVE-2023-29552 added to CISA KEV
8 Nov 2023 Added to the CISA KEV catalogue