Vulnerability identifier: #VU26846

Vulnerability risk: Medium

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1002

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Microsoft Forefront Endpoint Protection
Server applications / DLP, anti-spam, sniffers
Microsoft Security Essentials
Client/Desktop applications / Antivirus software/Personal firewalls
Windows Defender
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor: Microsoft

Description

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

The vulnerability exists due to the MpSigStub.exe for Defender allows file deletion in arbitrary locations. A local user can run a specially crafted command and delete protected files on an affected system once MpSigStub.exe ran again.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability..

Vulnerable software versions

Microsoft Forefront Endpoint Protection: 2010

Microsoft Security Essentials: All versions

Windows Defender: for Windows 8.1 - on Windows Server 2012

---

External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1002

---

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.