What is CVE-2024-37309?

CVE-2024-37309 is a medium-severity vulnerability in Crate, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2024-06-13.

How severe is CVE-2024-37309?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2024-37309 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Crate

CVE-2024-37309

CrateDB is a distributed SQL database. A high-risk vulnerability has been identified in versions prior to 5.7.2 where the TLS endpoint (port 4200) permits client-initiated renegotiation. In this scenario, an attacker can exploit this feature to repeatedly request renegotiation of security parameters during an ongoing TLS session. This flaw could lead to excessive consumption of CPU resources, resulting in potential server overload and service disruption. The vulnerability was confirmed using an openssl client where the command `R` initiates renegotiation, followed by the server confirming with `RENEGOTIATING`. This vulnerability allows an attacker to perform a denial of service attack by exhausting server CPU resources through repeated TLS renegotiations. This impacts the availability of services running on the affected server, posing a significant risk to operational stability and security. TLS 1.3 explicitly forbids renegotiation, since it closes a window of opportunity for an attack. Version 5.7.2 of CrateDB contains the fix for the issue.

Published 2024-06-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.007 (51.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Crate — versions < 5.7.2
Cratedb

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

Public proof-of-concept exploits

chnzzh/OpenSSL-CVE-lib

References

github.com/crate/crate/security/advisories/GHSA-x268-qpg6-w9g2 (Exploit, Vendor Advisory)
github.com/crate/crate/commit/1dde03bdf031a20886065195527e368e4a3218b3 (Patch)
cratedb.com/docs/crate/reference/en/latest/appendices/release-notes/5.7.2.html (Release Notes)

Frequently asked questions

What is CVE-2024-37309?: CVE-2024-37309 is a medium-severity vulnerability in Crate, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2024-06-13.
How severe is CVE-2024-37309?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2024-37309 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.