What is CVE-2023-5632?

CVE-2023-5632 is a high-severity vulnerability in Eclipse Mosquitto, classified under Excessive Iteration. CVSS score: 7.5/10. Published 2023-10-18.

How severe is CVE-2023-5632?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2023-5632 known to be exploited?

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

Vulnerability in Eclipse Mosquitto

CVE-2023-5632

In Eclipse Mosquito before and including 2.0.5, establishing a connection to the mosquitto server without sending data causes the EPOLLOUT event to be added, which results excessive CPU consumption. This could be used by a malicious actor…

EPSS: 0.001 (25.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Eclipse Mosquitto — versions 0

Weakness classification (CWE)

CWE-834 — Excessive Iteration

Public proof-of-concept exploits

References

github.com/eclipse/mosquitto/pull/2053 (patch, issue-tracking)
github.com/eclipse/mosquitto/commit/18bad1ff32435e523d7507e9b2ce0010124a8f2d (patch)

Frequently asked questions

What is CVE-2023-5632?: CVE-2023-5632 is a high-severity vulnerability in Eclipse Mosquitto, classified under Excessive Iteration. CVSS score: 7.5/10. Published 2023-10-18.
How severe is CVE-2023-5632?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2023-5632 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.