CVE-2023-5632

Unconditionally adding an event to the epoll causes excessive CPU consumption

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

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.09%
Affected: Eclipse Mosquitto
Published at:
Updated at:

References

Link Tags
https://github.com/eclipse/mosquitto/pull/2053 patch issue tracking
https://github.com/eclipse/mosquitto/commit/18bad1ff32435e523d7507e9b2ce0010124a8f2d patch

Frequently Asked Questions

What is the severity of CVE-2023-5632?
CVE-2023-5632 has been scored as a high severity vulnerability.
How to fix CVE-2023-5632?
To fix CVE-2023-5632, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-5632 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-5632 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-5632?
CVE-2023-5632 affects Eclipse Mosquitto.
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