#VU52480 Windows Hard Link in Apex One - CVE-2020-24562

Vulnerability identifier: #VU52480

Vulnerability risk: Low

CVSSv4.0: 5.9 [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:U/U:Clear]

CVE-ID: CVE-2020-24562

CWE-ID: CWE-65

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 Windows improperly handles hard links within the ApexOne Security Agent. A local user can create a hard link and abuse the service to overwrite the contents of a chosen file, leading to an elevated status.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apex One: 2019

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External links
https://www.zerodayinitiative.com/advisories/ZDI-20-1093/
https://success.trendmicro.com/solution/000263632

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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.