CVE-2024-3657 389-ds-base: potential denial of service via specially crafted kerberos as-req request
A specially crafted Kerberos AS-REQ request can cause the 389 Directory Server to fail, resulting in a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-3657?
CVE-2024-3657 is a high-severity denial of service vulnerability in Red Hat Directory Server 11.5 E4S for RHEL 8, published on 28 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in 389-ds-base. A specially-crafted LDAP query can potentially cause a failure on the directory server, leading to a denial of service
Weakness: CWE-20
Which versions are affected by CVE-2024-3657?
How do I fix CVE-2024-3657?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-3657 being exploited?
There is no known exploitation of CVE-2024-3657 in the wild and no public exploit code.
Sources
Also known as CLSA-2025-1762867058, DEBIAN-CVE-2024-3657, UBUNTU-CVE-2024-3657.