Service Location Protocol (SLP) Denial-of-Service Vulnerability (CVE-2023-29552)
Severity: high · Patch status: unknown · Since 2023-11-08 · CVE-2023-29552
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. CISA added CVE-2023-29552 to its Known Exploited Vulnerabilities catalog on Nov 8, 2023, which means attackers are exploiting it in the wild.
What to do
- 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.
- US federal agencies must remediate by Nov 29, 2023 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
