Privilege escalation in Microsoft Defender
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-1002 |
| CWE-ID | CWE-264 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
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 |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU26846
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 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe 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.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability..
Vulnerable software versionsMicrosoft Forefront Endpoint Protection: 2010
Microsoft Security Essentials: All versions
Windows Defender: for Windows 8.1 - on Windows Server 2012
External linkshttp://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.
