#VU74423 Improper input validation in Google Android - CVE-2021-39623

Vulnerability identifier: #VU74423

Vulnerability risk: Low

CVSSv4.0: 7.1 [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:P/U:Clear]

CVE-ID: CVE-2021-39623

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: Yes

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

Vendor: Google

Description

The vulnerability allows a local application to execute arbitrary code.

The vulnerability exists due to improper input validation within the Media Framework component. A local application can execute arbitrary code.

Mitigation
Install security update from vendor's website.

Vulnerable software versions

Google Android: before 9, 10, 11, 12, 9, 9

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External links
https://android.googlesource.com/platform/frameworks/av/+/5753afcd4c87f5566f4014cce1cbc8d767572331
https://source.android.com/docs/security/bulletin/2022-01-01

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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. However, proof of concept for this vulnerability is available.