CVE-2023-29552
The Service Location Protocol (SLP) contains a denial-of-service (DoS) vulnerability that could allow an unauthenticated, remote attacker to…
Browse: All 2023 CVEs · All vendors
- CVSS score
- 7.5 High
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- CISA KEV
- Yes — actively exploited (added 2023-11-08, remediation due 2023-11-29)
- Published
- 2023-04-25
- Last modified
- 2026-06-17
- NVD status
- Analyzed
Description
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.
Affected products
- netapp smi-s provider
- suse manager server
- suse linux enterprise server
- vmware esxi
- service location protocol project service location protocol
Affected ranges per NVD CPE data; confirm exact versions in the vendor advisory.
Required action (CISA)
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. Federal remediation deadline: 2023-11-29.
How to prioritize this
This vulnerability is on the CISA KEV list, meaning it is being actively exploited — treat it as urgent regardless of the raw CVSS number. Use the live CVE lookup for the latest NVD data, and the CVSS 3.1 calculator to model your own environmental score. For the actively exploited vulnerabilities that matter this week, read The Exploit HQ daily security brief.
References
- https://blogs.vmware.com/security/2023/04/vmware-response-to-cve-2023-29552-reflective-denial-of-service-dos-amplification-vulnerability-in-slp.html
- https://curesec.com/blog/article/CVE-2023-29552-Service-Location-Protocol-Denial-of-Service-Amplification-Attack-212.html
- https://datatracker.ietf.org/doc/html/rfc2608
- https://github.com/curesec/slpload
- https://security.netapp.com/advisory/ntap-20230426-0001/
- https://www.bitsight.com/blog/new-high-severity-vulnerability-cve-2023-29552-discovered-service-location-protocol-slp
- https://www.cisa.gov/news-events/alerts/2023/04/25/abuse-service-location-protocol-may-lead-dos-attacks
- https://www.suse.com/support/kb/doc/?id=000021051
FAQ
Is CVE-2023-29552 actively exploited?
Yes. CISA added CVE-2023-29552 to its Known Exploited Vulnerabilities (KEV) catalog on 2023-11-08, with a federal remediation deadline of 2023-11-29. A KEV listing means real-world exploitation is confirmed, so patching this should be prioritized above many higher-CVSS bugs that aren't being exploited.
What is the CVSS score of CVE-2023-29552?
CVE-2023-29552 has a CVSS base score of 7.5 (High). Its vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Related vulnerabilities
- CVE-2023-44487 — IETF HTTP/2
- CVE-2026-102764 — BeyondTrust Remote Support
- CVE-2025-61624 — Fortinet Multiple Products
- CVE-2026-21589 — Atlassian Multiple Products
- CVE-2026-105134 — Ahsay AhsayCBS
- CVE-2026-76519 — Cisco Secure Email Gateway
Data source: NVD & CISA KEV. Shown as-is; nothing added. Last generated from NVD data — re-check the live tool for updates.
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