Vulnerability identifier: #VU16679

Vulnerability risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-3990

CWE-ID: CWE-120

Exploitation vector: Local

Exploit availability: Yes

Vulnerable software:
Wibukey
Server applications / Other server solutions

Vendor: Wibu Systems

Description
The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists due to buffer overflow in the 0x8200E804 IOCTL handler functionality of WibuKey.sys when handling malicious input. A local attacker can use a specially crafted IRP request, trigger kernel memory corruption and gain elevated privileges.

Mitigation
Update to version 6.50.

Vulnerable software versions

Wibukey: 6.40.2402.500

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External links
http://blog.talosintelligence.com/2018/12/vulnerability-spotlight-multiple-vulns-wibu.html

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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.