Vulnerability identifier: #VU51057

Vulnerability risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11308

CWE-ID: CWE-129

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Google Android
Operating systems & Components / Operating system

Vendor: Google

Description

The vulnerability allows a local attacker to escalate privileges on the system.

The vulnerability exists due to boundary error in bootloader in Qualcomm chipsets when trying to convert ASCII string to Unicode string if the actual size is more than required. An attacker with physical access to the device can trigger buffer overflow during the boot process of the device and gain unauthorized access to the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Google Android: 11, 10, 9.0, 8.1

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External links
http://source.android.com/security/bulletin/2021-03-01
http://www.qualcomm.com/company/product-security/bulletins/march-2021-bulletin

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Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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