CVE-2023-29552

Exp

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.

Published: 2023-04-25 Last update: 2025-10-31 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-29552 is rated Critical Active Threat (90.2/100): CVSS High severity, with high exploitation likelihood (EPSS 92.14%, 100th percentile). CISA KEV confirms active exploitation (added 2023-11-08) affecting IETF / Service Location Protocol (SLP). Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2023-29552

Name: Service Location Protocol (SLP) Denial-of-Service Vulnerability · CISA KEV detail

Exploit added: 2023-11-08

Action due: 2023-11-29

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.

Public exploit references (Exploit-DB) for CVE-2023-29552

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2023-29552

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-22 91.87% 92.14% +0.27%
2 2026-04-26 92.96% 91.87% -1.09%
3 2026-01-03 — 92.96% —

Full EPSS history (32 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-29552

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2023-29552

OS Trackers for CVE-2023-29552

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2023-29552
suse high CVE-2023-29552 severity important: SUSE including 4 source package names (openslp, openslp-32bit, openslp-devel, openslp-server), 107 product×package rows across 38 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 7, … (38 product lines)): Will Not Fix 107. https://www.suse.com/security/cve/CVE-2023-29552/
ubuntu high CVE-2023-29552 high priority: Ubuntu including 1 source packages (openslp-dfsg), 11 status rows across 11 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, trusty, upstream, xenial): DNE 8, ignored 2, needs-triage 1. https://ubuntu.com/security/CVE-2023-29552

Affected software / configurations for CVE-2023-29552

Vendor Product Version Raw CPE
netapp smi-s_provider — cpe:2.3:a:netapp:smi-s_provider:-:*:*:*:*:*:*:*
suse manager_server — cpe:2.3:a:suse:manager_server:-:*:*:*:*:*:*:*
suse linux_enterprise_server 11 cpe:2.3:o:suse:linux_enterprise_server:11:-:*:*:*:*:*:*
suse linux_enterprise_server 12 cpe:2.3:o:suse:linux_enterprise_server:12:-:*:*:*:*:*:*
suse linux_enterprise_server 12 cpe:2.3:o:suse:linux_enterprise_server:12:-:*:*:*:sap:*:*
suse linux_enterprise_server 15 cpe:2.3:o:suse:linux_enterprise_server:15:*:*:*:*:-:*:*
suse linux_enterprise_server 15 cpe:2.3:o:suse:linux_enterprise_server:15:*:*:*:*:sap:*:*
vmware esxi < 7.0 cpe:2.3:o:vmware:esxi:*:*:*:*:*:*:*:*
service_location_protocol_project service_location_protocol — cpe:2.3:a:service_location_protocol_project:service_location_protocol:-:*:*:*:*:*:*:*

References for CVE-2023-29552

URL Tags
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
cvelogic Threat Intelligence