Vulnerability identifier: #VU17467

Vulnerability risk: Low

CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-12551

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Eclipse Mosquitto
Server applications / Other server solutions

Vendor: Eclipse

Description

The vulnerability allows a remote attacker to bypass password authentication.

The vulnerability exists due to insufficient validation of malformed input in a password file, when it is used for authentication. Incorrect data in password file will be treated by the application as a username with empty password, allowing attacker to gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Eclipse Mosquitto: 1.0 - 1.5.5

---

External links
http://mosquitto.org/blog/2019/02/version-1-5-6-released/

---

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.