VulnerabilityAnalyzed

CVE-2023-5632

This could be used by a malicious actor to perform denial of service type attack.

HIGH 7.5EPSS 0.69%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.69%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.69% probability · 51th percentile
CISA KEV: Not listed
Weakness: CWE-834
Affected: eclipse/mosquitto
Source: emo@eclipse.org

References

https://github.com/eclipse/mosquitto/commit/18bad1ff32435e523d7507e9b2ce0010124a8f2dPatch
https://github.com/eclipse/mosquitto/pull/2053Issue Tracking
https://github.com/eclipse/mosquitto/commit/18bad1ff32435e523d7507e9b2ce0010124a8f2dPatch
https://github.com/eclipse/mosquitto/pull/2053Issue Tracking

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.