[ CVE-2023-29552 · Published 25 Apr 2023 ]
Service Location Protocol (SLP) Denial-of-Service Vulnerability
[ Why it matters ]Priority signals
- Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2023-11-08
- EPSS: 64% chance of exploitation in the next 30 days (higher than 99% of CVEs)
[ Description ]Official 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.
CISA: 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.
[ Fixes ]Fixes and patches
CISA required action (US federal deadline 29 Nov 2023): 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.
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ References ]References
- blogs.vmware.com/security/2023/04/vmware-response-to-cve-2023-29552-reflective-denial-o…Third Party Advisory
- curesec.com/blog/article/CVE-2023-29552-Service-Location-Protocol-Denial-of-Service-Amp…ExploitThird Party Advisory
- datatracker.ietf.org/doc/html/rfc2608Technical Description
- github.com/curesec/slploadProduct
- security.netapp.com/advisory/ntap-20230426-0001Third Party Advisory
- www.bitsight.com/blog/new-high-severity-vulnerability-cve-2023-29552-discovered-service…ExploitThird Party Advisory
- www.cisa.gov/news-events/alerts/2023/04/25/abuse-service-location-protocol-may-lead-dos…Third Party AdvisoryUS Government Resource
- www.suse.com/support/kb/docThird Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource