#VU55409 Buffer overflow in Apex One - CVE-2021-36742

Vulnerability identifier: #VU55409

Vulnerability risk: High

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:Amber]

CVE-ID: CVE-2021-36742

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Apex One
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor: Trend Micro

Description

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

The vulnerability exists due to a boundary error. A local user can run a specially crafted program to trigger memory corruption and execute arability code with elevated privileges.

Note, the vulnerability is being actively exploited in the wild.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apex One: CP B2049 - 2019

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External links
https://success.trendmicro.com/solution/000287819
https://files.trendmicro.com/documentation/readme/Apex%20One/2020/apex_one_2019_win_en_criticalpatch_b9601_EN_Readme.html

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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.