Vulnerability identifier: #VU9103

Vulnerability risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-2893

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mongoose
Web applications / JS libraries

Vendor: Valenok

Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the MQTT packet parsing functionality due to improper input validation. A remote attacker can send a specially crafted MQTT SUBSCRIBE packet, trigger null pointer dereference and cause the server to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
Update to version 6.10.

Vulnerable software versions

Mongoose: 6.8

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External links
http://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0400

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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.