CVE-2023-5632

Unconditionally adding an event to the epoll causes excessive CPU consumption

State: Published
Severity: 7.5 High
Published: Oct 18, 2023
Updated: Sep 13, 2024
Reserved: Oct 18, 2023

Description

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 to perform denial of service type attack. This issue is fixed in 2.0.6

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	eclipse

Weaknesses

CWE-834 Excessive Iteration

Affected Products

Product	Versions
MosquittoEclipse	2.0.5 and earlierAffected

References

https://github.com/eclipse/mosquitto/pull/2053patchissue-tracking
https://github.com/eclipse/mosquitto/commit/18bad1ff32435e523d7507e9b2ce0010124a8f2dpatch

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