CVE-2023-29552: Service Location Protocol (SLP) Denial-of-Service Vulnerability
Reference page built from the source records below, each shown as its source publishes it. Dataset version ref-edf4e66a5864, updated 2026-11-02T23:39:54.475Z.
CISA Known Exploited Vulnerabilities
- Name
- Service Location Protocol (SLP) Denial-of-Service Vulnerability
- Vendor
- IETF
- Product
- Service Location Protocol (SLP)
- Added to the catalog
- 2023-11-08
- Due date for US federal agencies
- 2023-11-29
- Catalog version
- 2026.10.30
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.
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.
Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.
Links in CISA's notes
- 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://nvd.nist.gov/vuln/detail/CVE-2023-29552
Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
NVD analysis
- Status
- Analyzed
- Published
- 2023-04-25T16:15:09.537
- Last modified
- 2026-06-17T05:50:32.263
- Weaknesses
- NVD-CWE-noinfo
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.
| Metric | Score | Severity | Vector | Scored by |
|---|---|---|---|---|
| CVSS 3.1 | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | [email protected] (Primary) |
| CVSS 3.1 | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
References
- https://blogs.vmware.com/security/2023/04/vmware-response-to-cve-2023-29552-reflective-denial-of-service-dos-amplification-vulnerability-in-slp.html (Third Party Advisory)
- https://curesec.com/blog/article/CVE-2023-29552-Service-Location-Protocol-Denial-of-Service-Amplification-Attack-212.html (Exploit, Third Party Advisory)
- https://datatracker.ietf.org/doc/html/rfc2608 (Technical Description)
- https://github.com/curesec/slpload (Product)
- https://security.netapp.com/advisory/ntap-20230426-0001/ (Third Party Advisory)
- https://www.bitsight.com/blog/new-high-severity-vulnerability-cve-2023-29552-discovered-service-location-protocol-slp (Exploit, Third Party Advisory)
- https://www.cisa.gov/news-events/alerts/2023/04/25/abuse-service-location-protocol-may-lead-dos-attacks (Third Party Advisory, US Government Resource)
- https://www.suse.com/support/kb/doc/?id=000021051 (Third Party Advisory)
- https://blogs.vmware.com/security/2023/04/vmware-response-to-cve-2023-29552-reflective-denial-of-service-dos-amplification-vulnerability-in-slp.html (Third Party Advisory)
- https://curesec.com/blog/article/CVE-2023-29552-Service-Location-Protocol-Denial-of-Service-Amplification-Attack-212.html (Exploit, Third Party Advisory)
- https://datatracker.ietf.org/doc/html/rfc2608 (Technical Description)
- https://github.com/curesec/slpload (Product)
- https://security.netapp.com/advisory/ntap-20230426-0001/ (Third Party Advisory)
- https://www.bitsight.com/blog/new-high-severity-vulnerability-cve-2023-29552-discovered-service-location-protocol-slp (Exploit, Third Party Advisory)
- https://www.cisa.gov/news-events/alerts/2023/04/25/abuse-service-location-protocol-may-lead-dos-attacks (Third Party Advisory, US Government Resource)
- https://www.suse.com/support/kb/doc/?id=000021051 (Third Party Advisory)
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-29552 (US Government Resource)
This product uses the NVD API but is not endorsed or certified by the NVD.
Read on 2026-11-02T23:42:08.214Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2023-29552
CVE record
- Assigner
- mitre
- State
- PUBLISHED
- Published
- 2023-04-25T00:00:00.000Z
- Updated
- 2025-10-21T23:05:48.255Z
- Problem types
- n/a
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.
References
- https://datatracker.ietf.org/doc/html/rfc2608
- https://www.bitsight.com/blog/new-high-severity-vulnerability-cve-2023-29552-discovered-service-location-protocol-slp
- https://blogs.vmware.com/security/2023/04/vmware-response-to-cve-2023-29552-reflective-denial-of-service-dos-amplification-vulnerability-in-slp.html
- 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
- https://curesec.com/blog/article/CVE-2023-29552-Service-Location-Protocol-Denial-of-Service-Amplification-Attack-212.html
- https://github.com/curesec/slpload
- https://security.netapp.com/advisory/ntap-20230426-0001/
Read on 2026-11-03T02:03:26.224Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2023/29xxx/CVE-2023-29552.json
Sources and licences
CISA
Source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30, CC0 1.0. Use of this data does not imply endorsement by CISA or DHS.
National Vulnerability Database (NIST)
This product uses the NVD API but is not endorsed or certified by the NVD.
NVD API Terms of Use (NIST publications in the public domain, 17 U.S.C. 105)
CVE Program, The MITRE Corporation
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Cite this page
Dragons Eye Ransomware Tracker, "CVE-2023-29552: Service Location Protocol (SLP) Denial-of-Service Vulnerability",
entity page, dataset version ref-edf4e66a5864, updated 2026-11-02T23:39:54.475Z,
https://ransomware-tracker.com/cve/CVE-2023-29552 (accessed 2026-11-03).
Underlying source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30.
Underlying source: National Vulnerability Database (NIST), CVE API 2.0, record last modified 2026-06-17T05:50:32.263.
Underlying source: CVE List (CVE Program, The MITRE Corporation), record updated 2025-10-21T23:05:48.255Z.
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