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ExploitedIn CISA KEV

CVE-2023-29552

Exploitation confirmed. First attested on 2023-11-08 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2023-04-25

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2023-04-2516:15CVE publishedNVD
  2. 2023-11-08Added to the CISA KEV catalogCISA KEV
  3. 2023-11-08Listed as exploited by GCVEGCVE
  4. 2023-11-08Exploitation first reportedCISA KEV
  5. 2025-01-2821:15SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-04 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-29552?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-29552?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Suse linux enterprise server
BranchAffectedFixed in
11.x= 11no fix published
12.x= 12no fix published
15.x= 15no fix published
Netapp smi-s provider
BranchAffectedFixed in
—all versionsno fix published
Service location protocol project service location protocol
BranchAffectedFixed in
—all versionsno fix published

2 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • openslp-dfsgUbuntu:Pro:14.04:LTSall versions · no fixed version listed
  • openslp-dfsgUbuntu:16.04:LTSall versions · no fixed version listed

Vendor advisories

  • CVE-2023-29552 Red Hat Product Security11 known affected

    openslp: Reflective denial of service amplification attack via UDP

    openslp as a component of Red Hat Enterprise Linux 6 · openslp-devel as a component of Red Hat Enterprise Linux 6 · openslp-server as a component of Red Hat Enterprise Linux 6 · +8 more

Full record on NVD

Fix

  1. CISA’s 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.due 2023-11-29
  2. No fix planned, says the vendor Red Hat Product Security CVE-2023-29552 · 4 productsOut of support scope
  3. No fix planned, says the vendor Red Hat Product Security CVE-2023-29552 · 7 productsWill not fix

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2023-11-08
Patch Due Date
2023-11-29
Ransomware Use
Unknown
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.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2023-04-25
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-288r-5qm5-qp55

Frequently asked questions

What is CVE-2023-29552?

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.

Is CVE-2023-29552 actively exploited?

Yes. CVE-2023-29552 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2023-11-29.

What is the CVSS score for CVE-2023-29552?

CVE-2023-29552 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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Sources for this record