CVE-2023-29552: Service Location Protocol (SLP) Denial-of-Service Vulnerability

The Service Location Protocol (SLP) contains a denial-of-service (DoS) vulnerability that could allow an unauthenticated, remote attacker to register services and use spoofed UDP traffic to conduct a denial-of-service (DoS) attack with a significant amplification factor.

VendorIETF
ProductService Location Protocol (SLP)
Date added to KEV2023-11-08
Due date (BOD 22-01)2023-11-29
Known ransomware campaign useUnknown
CWENot listed in feed
Required actionApply 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.

What to do

  1. Identify every instance of IETF Service Location Protocol (SLP) in your environment (asset inventory, EDR, vulnerability scanner).
  2. Apply CISA's 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.
  3. Federal civilian agencies must act by 2023-11-29 under BOD 22-01; other organizations can use the same date as a target.
  4. Check the vendor advisory and NVD entry linked below for affected versions, then record the fix in your change log.

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Sources

Generated from the CISA feed with AI assistance; facts are taken verbatim from the feed. Not affiliated with or endorsed by CISA. Facts come from the CISA Known Exploited Vulnerabilities catalog (public domain).