Vulnerability identifier: #VU46009

Vulnerability risk: Low

CVSSv3.1: 7.3 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-284

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Azure Sphere
Server applications / SCADA systems

Vendor: Microsoft

Description

The vulnerability allows a local attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the normal world’s signed code execution functionality. A local attacker can use a specially crafted shellcode that modifies the program at runtime via "/proc/thread-self/mem" and execute arbtrary code on the target 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-2020-1138

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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.