# IETF Service Location Protocol (SLP): Denial-of-Service (CVE-2023-29552) · pwn.watch

> 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. Added to CISA KEV on 2023-11-08.

Page: https://pwn.watch/i/ietf-service-location-protocol-slp-cve-2023-29552 · generated 2026-10-22T23:52:53.443Z

## Status
- Severity: high · status: closed · patch: patched
- Product: IETF Service Location Protocol (SLP)
- Started: 2023-11-08 · closed: 2023-11-08
- CVEs: CVE-2023-29552
- Affected: See vendor advisory / CISA notes (versions not always listed in KEV feed)
- Fixed in: See vendor advisory linked in sources

## Follow this incident
- RSS (one item per update): https://pwn.watch/i/ietf-service-location-protocol-slp-cve-2023-29552/feed.xml
- JSON Feed: https://pwn.watch/i/ietf-service-location-protocol-slp-cve-2023-29552/feed.json
- Full data (timeline, sources, posts, agentBrief): https://pwn.watch/i/ietf-service-location-protocol-slp-cve-2023-29552.json
- This file: https://pwn.watch/i/ietf-service-location-protocol-slp-cve-2023-29552/llms.txt

## Updates (newest first)
- 2023-11-08: CISA added CVE-2023-29552 to the KEV catalog (due 2023-11-29).

## Fix brief
# Security brief: IETF Service Location Protocol (SLP): Denial-of-Service (CVE-2023-29552)

Source: https://pwn.watch/i/ietf-service-location-protocol-slp-cve-2023-29552 · status: closed (closed Nov 8, 2023) · severity: high · updated Nov 8, 2023

## Patch status
**PATCHED: fixed releases exist. Upgrade to a fixed version.**

## What it is
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. Added to CISA KEV on 2023-11-08.

Severity detail: CVSS 7.5 (NVD), actively exploited (CISA KEV)

- Product: IETF Service Location Protocol (SLP)
- CVE / advisory ids: CVE-2023-29552

## Affected versions
- See vendor advisory / CISA notes (versions not always listed in KEV feed)

## Check whether you're affected
No generic command applies (the product is a hosted service, appliance or desktop app). Check the installed version in its admin UI / About screen and compare with the versions above.

## Fix
Upgrade to one of these fixed versions (or later on the same branch):
- See vendor advisory linked in sources

After upgrading, re-run the checks above and redeploy/restart the affected services.

## Latest updates
- Nov 8, 2023: CISA added CVE-2023-29552 to the KEV catalog (due 2023-11-29).

## Advisories
- [NVD: CVE-2023-29552](https://nvd.nist.gov/vuln/detail/CVE-2023-29552) (NVD)
- [CISA Known Exploited Vulnerabilities Catalog](https://www.cisa.gov/known-exploited-vulnerabilities-catalog) (CISA)

## Caveats
Derived from CISA KEV JSON feed catalogVersion 2026.10.21. Exact affected/fixed version strings are not always in the KEV record — verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier).

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Machine-readable: https://pwn.watch/i/ietf-service-location-protocol-slp-cve-2023-29552.json · all incidents: https://pwn.watch/incidents.json. Verify against the vendor advisory before changing production systems.