#VU73012 Improper Authentication in MediaTek products - CVE-2022-20034

Vulnerability identifier: #VU73012

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-20034

CWE-ID: CWE-287

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
MT6580
Mobile applications / Mobile firmware & hardware
MT6735
Mobile applications / Mobile firmware & hardware
MT6739
Mobile applications / Mobile firmware & hardware
MT6761
Mobile applications / Mobile firmware & hardware
MT6763
Mobile applications / Mobile firmware & hardware
MT6765
Mobile applications / Mobile firmware & hardware
MT6768
Mobile applications / Mobile firmware & hardware
MT6769
Mobile applications / Mobile firmware & hardware
MT6771
Mobile applications / Mobile firmware & hardware
MT6799
Mobile applications / Mobile firmware & hardware
MT6833
Mobile applications / Mobile firmware & hardware
MT6779
Hardware solutions / Firmware
MT6781
Hardware solutions / Firmware
MT6785
Hardware solutions / Firmware
MT6853
Hardware solutions / Firmware
MT6873
Hardware solutions / Firmware
MT6875
Hardware solutions / Firmware
MT6877
Hardware solutions / Firmware
MT6885
Hardware solutions / Firmware
MT6891
Hardware solutions / Firmware
MT6893
Hardware solutions / Firmware

Vendor: MediaTek

Description

The vulnerability allows a local application to execute arbitrary code.

The vulnerability exists due to an improper certificate validation within Preloader XFLASH. A local application can execute arbitrary code.

Mitigation
Install security update from vendor's website.

Vulnerable software versions

MT6580: All versions

MT6735: All versions

MT6739: All versions

MT6761: All versions

MT6763: All versions

MT6765: All versions

MT6768: All versions

MT6769: All versions

MT6771: All versions

MT6779: All versions

MT6781: All versions

MT6785: All versions

MT6799: All versions

MT6833: All versions

MT6853: All versions

MT6873: All versions

MT6875: All versions

MT6877: All versions

MT6885: All versions

MT6891: All versions

MT6893: All versions

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External links
https://corp.mediatek.com/product-security-bulletin/February-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.