Security Bulletin: IBM App Connect Enterprise and IBM Integration Bus are vulnerable to a denial of service due to Eclipse Mosquitto.

Summary

The built-in MQTT pub/sub broker in IBM App Connect Enterprise and IBM Integration Bus is vulnerable to a denial of service due to Eclipse Mosquitto. (CVE-2023-5632)

Vulnerability Details

CVEID:CVE-2023-5632
**DESCRIPTION:**Eclipse Mosquitto is vulnerable to a denial of service, caused by a flaw when establishing a connection without sending data. By sending a specially crafted request, a remote attacker could exploit this vulnerability to cause excessive CPU consumption, and results in a denial of service condition.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/269080 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Remediation/Fixes

IBM strongly recommends addressing the vulnerability/vulnerabilities now by applying the appropriate fix to IBM App Connect Enterprise and IBM Integration Bus

The APAR (IT44841) is available from

IBM App Connect Enterprise v12 - Fix Pack 12.0.10.1

IBM App Connect Enterprise| 11.0.0.1 - 11.0.0.23| IT44841|

Interim Fix for APAR (IT44841) is available to apply to 11.0.0.23 from

IBM Fix Central

IBM Integration Bus| 10.1 - 10.1.0.1| IT44841|

The APAR (IT44841) is available from

IBM App Connect Enterprise v10.1 - Fix Pack 10.1.0.2

Workarounds and Mitigations

None