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.

Environment

SUSE Linux Enterprise Server 11
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Manager Server

Situation

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.

Resolution

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

Status

Security Alert

Additional Information

https://www.bitsight.com/blog/new-high-severity-vulnerability-cve-2023-29552-discovered-service-location-protocol-slp

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

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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