Vulnerability identifier: #VU73039

Vulnerability risk: Low

CVSSv3.1: 2 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-20066

CWE-ID: CWE-755

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
MT8168
Mobile applications / Mobile firmware & hardware
MT8365
Mobile applications / Mobile firmware & hardware
MT8696
Mobile applications / Mobile firmware & hardware
MT6580
Mobile applications / Mobile firmware & hardware
MT6739
Mobile applications / Mobile firmware & hardware
MT6761
Mobile applications / Mobile firmware & hardware
MT6765
Mobile applications / Mobile firmware & hardware
MT6769
Mobile applications / Mobile firmware & hardware
MT6771
Mobile applications / Mobile firmware & hardware
MT6833
Mobile applications / Mobile firmware & hardware
MT8666
Mobile applications / Mobile firmware & hardware
MT8667
Mobile applications / Mobile firmware & hardware
MT8766
Mobile applications / Mobile firmware & hardware
MT8768
Mobile applications / Mobile firmware & hardware
MT8788
Mobile applications / Mobile firmware & hardware
MT6785
Hardware solutions / Firmware
MT6873
Hardware solutions / Firmware
MT6875
Hardware solutions / Firmware
MT6877
Hardware solutions / Firmware
MT6891
Hardware solutions / Firmware

Vendor: MediaTek

Description

The vulnerability allows a local privileged application to gain access to sensitive information.

The vulnerability exists due to incorrect error handling within atf (hwfde). A local privileged application can gain access to sensitive information.

Mitigation
Install security update from vendor's website.

Vulnerable software versions

MT8168: All versions

MT8365: All versions

MT8696: All versions

MT6580: All versions

MT6739: All versions

MT6761: All versions

MT6765: All versions

MT6769: All versions

MT6771: All versions

MT6785: All versions

MT6833: All versions

MT6873: All versions

MT6875: All versions

MT6877: All versions

MT6891: All versions

MT8666: All versions

MT8667: All versions

MT8766: All versions

MT8768: All versions

MT8788: All versions

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External links
http://corp.mediatek.com/product-security-bulletin/April-2022
http://corp.mediatek.com/product-security-bulletin/May-2022

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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.