Vulnerability identifier: #VU16678

Vulnerability risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-3991

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Wibukey
Server applications / Other server solutions

Vendor: Wibu Systems

Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to heap-based buffer overflow in the WkbProgramLow function of WibuKey Network server management when handling malicious input. A remote attacker can supply a specially crafted TCP package, trigger memory corruption and execute kernel level code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

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?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.