Exploited vulnerability · CISA KEV

Is CVE-2023-29552 exploited? Yes: in CISA KEV since 8 Nov 2023

Gociux · IETF Service Location Protocol (SLP) · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2023-29552, Service Location Protocol (SLP) Denial-of-Service Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 8 Nov 2023, 197 days after it was published. It affects IETF Service Location Protocol (SLP). If you run it, CISA's required action is: 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.

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.

What to do

1. Check whether you run it. Look for Service Location Protocol (SLP) in your asset inventory, including appliances and cloud images. Stack check lists every exploited IETF CVE at once.
2. Apply the fix. 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.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 25 Apr 2023.
4. Get told next time. Email alerts when CISA adds a CVE for IETF.

References

• nvd.nist.gov/vuln/detail/CVE-2023-29552

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in November 2023 · IETF scorecard · act-now radar.