Vulnerability identifier: #VU47397

Vulnerability risk: Low

CVSSv3.1: 8.1 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Azure Sphere
Server applications / SCADA systems

Vendor: Microsoft

Description

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

The vulnerability exists due to a boundary error in the Pluton SIGN_WITH_TENANT_ATTESTATION_KEY functionality. A local attacker can use specially crafted ioctl calls, trigger memory corruption and execute arbitrary code on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Azure Sphere: 20.07

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External links
http://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1139

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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