Vulnerability identifier: #VU72932

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-32484

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MT6739
Mobile applications / Mobile firmware & hardware
MT6761
Mobile applications / Mobile firmware & hardware
MT6762
Mobile applications / Mobile firmware & hardware
MT6762D
Mobile applications / Mobile firmware & hardware
MT6762M
Mobile applications / Mobile firmware & hardware
MT6763
Mobile applications / Mobile firmware & hardware
MT6765
Mobile applications / Mobile firmware & hardware
MT6765T
Mobile applications / Mobile firmware & hardware
MT6767
Mobile applications / Mobile firmware & hardware
MT6768
Mobile applications / Mobile firmware & hardware
MT6769
Mobile applications / Mobile firmware & hardware
MT6769T
Mobile applications / Mobile firmware & hardware
MT6769Z
Mobile applications / Mobile firmware & hardware
MT6771
Mobile applications / Mobile firmware & hardware
MT6783
Mobile applications / Mobile firmware & hardware
MT6785T
Mobile applications / Mobile firmware & hardware
MT6779
Hardware solutions / Firmware
MT6785
Hardware solutions / Firmware

Vendor: MediaTek

Description

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to a heap buffer overflow within Modem 2G RRM. A remote attacker can trick the victim to open a specially crafted file and execute arbitrary code.

Mitigation
Install security update from vendor's website.

Vulnerable software versions

MT6739: All versions

MT6761: All versions

MT6762: All versions

MT6762D: All versions

MT6762M: All versions

MT6763: All versions

MT6765: All versions

MT6765T: All versions

MT6767: All versions

MT6768: All versions

MT6769: All versions

MT6769T: All versions

MT6769Z: All versions

MT6771: All versions

MT6779: All versions

MT6783: All versions

MT6785: All versions

MT6785T: All versions

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External links
http://corp.mediatek.com/product-security-bulletin/September-2021

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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