#VU33230 Resource exhaustion in Eclipse Mosquitto - CVE-2017-7651

Vulnerability identifier: #VU33230

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-7651

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Eclipse Mosquitto
Server applications / Other server solutions

Vendor: Eclipse

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

In Eclipse Mosquitto 1.4.14, a user can shutdown the Mosquitto server simply by filling the RAM memory with a lot of connections with large payload. This can be done without authentications if occur in connection phase of MQTT protocol.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Eclipse Mosquitto: 1.4.14

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External links
https://bugs.eclipse.org/bugs/show_bug.cgi?id=529754
https://lists.debian.org/debian-lts-announce/2018/03/msg00037.html
https://lists.debian.org/debian-lts-announce/2018/06/msg00016.html
https://mosquitto.org/blog/2018/02/security-advisory-cve-2017-7651-cve-2017-7652/
https://www.debian.org/security/2018/dsa-4325

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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