{"id":"CVE-2023-29552","published":"2023-04-25T16:15:09Z","modified":"2026-06-17T05:50:32Z","title":"Service Location Protocol (SLP) Denial-of-Service Vulnerability","vendor":"IETF","product":"Service Location Protocol (SLP)","tier":"core","eol":null,"description":{"text":"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.","provenance":"source","from":"NVD"},"summary":{"text":"The Service Location Protocol (SLP, RFC 2608) service registration functionality contains a flaw that lets remote parties register arbitrary services. An unauthenticated remote attacker can abuse this with spoofed UDP traffic to mount a denial-of-service attack with significant amplification, requiring no authentication, no user interaction, and only network reachability to the SLP service.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:11:05Z"},"cvss":{"score":7.5,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.63975,"percentile":0.99221,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2023-11-08","dueDate":"2023-11-29","ransomware":false,"requiredAction":"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.","notes":"This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on the patching status. For more information please see https://www.bitsight.com/blog/new-high-severity-vulnerability-cve-2023-29552-discovered-service-location-protocol-slp and 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","provenance":"source"},"vulncheckKev":{"dateAdded":"2023-04-25","exploitedFirstSeen":"2023-04-25","ransomware":true,"evidence":[{"url":"https://curesec.com/blog/article/CVE-2023-29552-Service-Location-Protocol-Denial-of-Service-Amplification-Attack-212.html","date":"2023-04-25"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2023-11-08"},{"url":"https://fortiguard.fortinet.com/outbreak-alert/iran-linked-cyber-attacks","date":"2026-03-31"}],"evidenceTotal":3,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[],"references":[{"url":"https://blogs.vmware.com/security/2023/04/vmware-response-to-cve-2023-29552-reflective-denial-of-service-dos-amplification-vulnerability-in-slp.html","tags":["Third Party Advisory"]},{"url":"https://curesec.com/blog/article/CVE-2023-29552-Service-Location-Protocol-Denial-of-Service-Amplification-Attack-212.html","tags":["Exploit","Third Party Advisory"]},{"url":"https://datatracker.ietf.org/doc/html/rfc2608","tags":["Technical Description"]},{"url":"https://github.com/curesec/slpload","tags":["Product"]},{"url":"https://security.netapp.com/advisory/ntap-20230426-0001/","tags":["Third Party Advisory"]},{"url":"https://www.bitsight.com/blog/new-high-severity-vulnerability-cve-2023-29552-discovered-service-location-protocol-slp","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.cisa.gov/news-events/alerts/2023/04/25/abuse-service-location-protocol-may-lead-dos-attacks","tags":["Third Party Advisory","US Government Resource"]},{"url":"https://www.suse.com/support/kb/doc/?id=000021051","tags":["Third Party Advisory"]},{"url":"https://blogs.vmware.com/security/2023/04/vmware-response-to-cve-2023-29552-reflective-denial-of-service-dos-amplification-vulnerability-in-slp.html","tags":["Third Party Advisory"]},{"url":"https://curesec.com/blog/article/CVE-2023-29552-Service-Location-Protocol-Denial-of-Service-Amplification-Attack-212.html","tags":["Exploit","Third Party Advisory"]},{"url":"https://datatracker.ietf.org/doc/html/rfc2608","tags":["Technical Description"]},{"url":"https://github.com/curesec/slpload","tags":["Product"]},{"url":"https://security.netapp.com/advisory/ntap-20230426-0001/","tags":["Third Party Advisory"]},{"url":"https://www.bitsight.com/blog/new-high-severity-vulnerability-cve-2023-29552-discovered-service-location-protocol-slp","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.cisa.gov/news-events/alerts/2023/04/25/abuse-service-location-protocol-may-lead-dos-attacks","tags":["Third Party Advisory","US Government Resource"]},{"url":"https://www.suse.com/support/kb/doc/?id=000021051","tags":["Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-29552","tags":["US Government Resource"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: unauthenticated remote attacker abuses exposed service","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"allows an unauthenticated, remote attacker to register arbitrary services","start":46,"end":119}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1499.004","name":"Application or System Exploitation","tactics":["impact"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: spoofed UDP amplification causes denial of service","mappingType":"primary_impact","evidence":[{"from":"description","quote":"could allow the attacker to use spoofed UDP traffic to conduct a denial-of-service attack","start":126,"end":215}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2023-33094","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-33094","exploited":true,"exploitedSince":"2023-11-08","provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":["https://curesec.com/blog/article/CVE-2023-29552-Service-Location-Protocol-Denial-of-Service-Amplification-Attack-212.html","https://www.bitsight.com/blog/new-high-severity-vulnerability-cve-2023-29552-discovered-service-location-protocol-slp"],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1499.004"],"provenance":"ai"}],"timeline":[{"date":"2023-04-25","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-29552","provenance":"source"},{"date":"2023-04-25","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://curesec.com/blog/article/CVE-2023-29552-Service-Location-Protocol-Denial-of-Service-Amplification-Attack-212.html","provenance":"source"},{"date":"2023-11-08","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2023-11-08","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-33094","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":197},"priority":{"score":78.1,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 1283 days ago"},{"name":"Known ransomware 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