Remote code execution in Microsoft Hub Device Client SDK for Azure IoT

1) Memory corruption

EUVDB-ID: #VU15278

Risk: High

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-8531

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to boundary error when Azure IoT Hub Device Client SDK using MQTT protocol accesses objects in memory. A remote unauthenticated attacker can trick users into taking action, typically via an enticement in email or instant message, or by getting them to open an email attachment to trigger memory corruption and execute arbitrary code with SYSTEM privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Hub Device Client SDK for Azure IoT: All versions

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8531

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. However, proof of concept for this vulnerability is available.