#VU19969 Improper Authentication in SHIELD TV - CVE-2019-5679

Vulnerability identifier: #VU19969

Vulnerability risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-5679

CWE-ID: CWE-287

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
SHIELD TV
Hardware solutions / Firmware

Vendor: nVidia

Description

The vulnerability allows a local attacker to bypass authentication process.

The vulnerability exists due to the Trusted OS image is improperly authenticated in the Tegra bootloader in nvtboot. A local authenticated attacker can bypass authentication process and gain unauthorized access to the application.

This vulnerability may lead to code execution, denial of service, escalation of privileges, and information disclosure.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SHIELD TV: before 8.0

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External links
https://nvidia.custhelp.com/app/answers/detail/a_id/4804

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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.