#VU69233 Security features bypass in Samsung Mobile Firmware - CVE-2021-25371

Vulnerability identifier: #VU69233

Vulnerability risk: Low

CVSSv4.0: 8.5 [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:A/U:Clear]

CVE-ID: CVE-2021-25371

CWE-ID: CWE-254

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Samsung Mobile Firmware
Mobile applications / Mobile firmware & hardware

Vendor: Samsung

Description

The vulnerability allows a local application to bypass implemented security restrictions.

The vulnerability exists due to arbitrary ELF libraries can be loaded inside the DSP driver. A local application installed on the device can load a malicious code inside the DSP driver to hide its presence. 

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Samsung Mobile Firmware: before SMR-MAR-2021

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External links
https://security.samsungmobile.com/securityUpdate.smsb#SMR-MAR-2021

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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?

Yes. This vulnerability is being exploited in the wild.