Vulnerability identifier: #VU18580

Vulnerability risk: Low

CVSSv3.1: 6.6 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: N/A

CWE-ID: CWE-362

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Windows
Operating systems & Components / Operating system

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to a race condition in the way the Windows Error Reporting service is processing file permissions. A local user can create a hardlink to a privileged file and change its permission within a short timeframe.

Successful exploitation of the vulnerability may allow an attacker to grant write permissions to critical system files and escalate privileges on the system.

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

Vulnerable software versions

Windows: 10 - 10 Gold

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External links
http://github.com/SandboxEscaper/polarbearrepo/tree/master/angrypolarbearbug2

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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. However, proof of concept for this vulnerability is available.