CVE-2023-29552 IETF Service Location Protocol (SLP): software flaw
In plain words: A mistake in the software that attackers have found a way to abuse. Depends on the product — see the description and the vendor advisory.
Confirmed exploited by CISA on · US federal patch deadline Nov 29, 2023
What to do
- Install IETF's security update for Service Location Protocol (SLP). If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Keep a list of every internet-facing server you run so nothing is forgotten.
- Patch anything in this catalog first, ahead of normal patch cycles.
- Put admin and file-transfer apps behind a VPN or single sign-on instead of the open internet.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: Mass data theft and ransomware: a single flaw in a file-transfer or email server has exposed thousands of organisations at once.
The details
- Official name
- Service Location Protocol (SLP) Denial-of-Service Vulnerability
- Product
- IETF Service Location Protocol (SLP)
- CISA description
- 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.
- Type of flaw
- Software flaw
- Confirmed exploited
- Nov 8, 2023
- US federal patch deadline
- Nov 29, 2023
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Answering about CVE-2023-29552 ·
Questions about CVE-2023-29552
Is CVE-2023-29552 being exploited?
Yes. CISA added CVE-2023-29552 to its Known Exploited Vulnerabilities catalog on Nov 8, 2023, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2023-29552?
Install IETF's security update for Service Location Protocol (SLP). If no update exists, follow the vendor's workaround or stop using the product until one ships. Keep a list of every internet-facing server you run so nothing is forgotten.
Am I affected by CVE-2023-29552?
Only if you use IETF Service Location Protocol (SLP). Aimed mostly at company systems — you are affected through the companies you use, not your own phone.