CVE-2023-28366

Description

The broker in Eclipse Mosquitto 1.3.2 through 2.x before 2.0.16 has a memory leak that can be abused remotely when a client sends many QoS 2 messages with duplicate message IDs, and fails to respond to PUBREC commands. This occurs because of mishandling of EAGAIN from the libc send function.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.09%
Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory gentoo.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/eclipse/mosquitto/compare/v2.0.15...v2.0.16 release notes
https://www.compass-security.com/fileadmin/Research/Advisories/2023_02_CSNC-2023-001_Eclipse_Mosquitto_Memory_Leak.txt third party advisory
https://mosquitto.org/blog/2023/08/version-2-0-16-released/ release notes
https://github.com/eclipse/mosquitto/commit/6113eac95a9df634fbc858be542c4a0456bfe7b9 patch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KJ2FMBGVVQEQWTTQB7YLKTAHMX2UM66X/ vendor advisory
https://www.debian.org/security/2023/dsa-5511 vendor advisory
https://security.gentoo.org/glsa/202401-09 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-28366?
CVE-2023-28366 has been scored as a high severity vulnerability.
How to fix CVE-2023-28366?
To fix CVE-2023-28366, 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-2023-28366 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-28366 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.
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