CVE-2021-34432

2021-07-2700:00:00

ubuntu.com

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

0.001 Low

EPSS

Percentile

39.4%

In Eclipse Mosquitto versions 2.07 and earlier, the server will crash if
the client tries to send a PUBLISH packet with topic length = 0.

Author	Note
gianz	PoC: https://bugs.eclipse.org/bugs/show_bug.cgi?id=574141 (first message) The CVE indicates versions <= 2.0.7 as affected. However only versions >= 2.0.0 and <= 2.0.7 are vulnerable. No crash detected running the PoC against any previous version we support.