Security Vulnerability: New SLP based traffic amplification attack (CVE-2023-29552)

This document (000021051) is provided subject to the disclaimer at the end of this document.


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Security researchers Pedro Umbelino at Bitsight and Marco Lux at Curesec have published a new network traffic amplification attack using the SLP protocol, which allow amplification up to 2200 times, allowing very effective distributed denial of service attacks.

This flaw is a network protocol design flaw, a software fix is not easily possible.

SUSE ships the openslp service that offers this protocol.


The SLP protocol IP ports 427, both UDP and TCP, outside of your network boundary should be blocked or filtered.


Security Alert

Additional Information


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  • Document ID:000021051
  • Creation Date: 25-Apr-2023
  • Modified Date:25-Apr-2023
    • SUSE Linux Enterprise Server
    • SUSE Linux Enterprise Server for SAP Applications
    • SUSE Manager Server

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