Vulnerability identifier: #VU53514

Vulnerability risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-32458

CWE-ID: CWE-121

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Home Network Security
Hardware solutions / Routers for home users

Vendor: Trend Micro

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in the tdts.ko chrdev_ioctl_handle. A local user can perform a specially crafted IOCTL call to trigger stack-based buffer overflow and execute arbitrary code on the system with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Home Network Security: 6.1.567 - 6.6.604

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External links
http://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1231
http://helpcenter.trendmicro.com/en-us/article/TMKA-10337

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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.