#VU12494 Improper certificate validation in Microsoft products - CVE-2018-8119

Vulnerability identifier: #VU12494

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-8119

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
C# SDK for Azure IoT
Universal components / Libraries / Software for developers
C SDK for Azure IoT
Universal components / Libraries / Software for developers
Java SDK for Azure IoT
Universal components / Libraries / Software for developers

Vendor: Microsoft

Description
The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to improper certificate validation over the AMQP protocol in the Azure IoT Device Provisioning AMQP Transport library. A remote attacker can perform a man-in-the-middle (MitM) attack during provisioning process.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

C# SDK for Azure IoT: All versions

C SDK for Azure IoT: All versions

Java SDK for Azure IoT: All versions

---

External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8119

---

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.