Privilege escalation in Microsoft Windows Defender Antimalware Platform



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-0835
CWE-ID CWE-65
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Windows Defender antimalware platform
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor Microsoft

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Windows Hard Link

EUVDB-ID: #VU26881

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-0835

CWE-ID: CWE-65 - Windows hard link

Exploit availability: No

Description

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

The vulnerability exists due to the Windows Defender antimalware platform improperly handles hard links. A local user can run a specially crafted application and overwrite a targeted file leading to an elevated status. 

Mitigation

Install update from vendor's website.

Vulnerable software versions

Windows Defender antimalware platform: 4.18.2001.111

CPE2.3 External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0835


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.



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