Use-after-free in Eclipse Mosquitto

Published: 2019-09-19 | Updated: 2019-09-29

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2019-11778
CWE-ID	CWE-416
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Eclipse Mosquitto Server applications / Other server solutions
Vendor	Eclipse

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU21406

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-11778

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (Dos) attack.

The vulnerability exists due to a use-after-free error when processing "delay interval" and "session expiry interval" values. A malicious MQTT v5 client can set specially crafted values for the affected options and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Eclipse Mosquitto: 1.6 - 1.6.4

External links

http://bugs.eclipse.org/bugs/show_bug.cgi?id=551162

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.