Actively exploited in the wild
Service Location Protocol (SLP) Denial-of-Service Vulnerability
IETF - Service Location Protocol (SLP) · Listed in the CISA KEV since 2023-11-08. This indicates confirmed attacks in production environments.
Required action: 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.
CVE-2023-29552
HighCVSS 7.5KEVSummary
The Service Location Protocol (SLP) 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.
Risk Assessment
An attacker could conduct a denial-of-service attack on network infrastructure, causing service unavailability.
Recommendation
Restrict external access to UDP port 427 (SLP) or disable the SLP service if not required.
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Original NVD description (English source)
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.