Vulnerability identifier: #VU55441

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-20094

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
CodeMeter Runtime
Server applications / DLP, anti-spam, sniffers

Vendor:

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition. A remote attacker can send a specially crafted packet to the CodeMeter Runtime CmWAN server, trigger out-of-bounds read error and cause a denial of service condition on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-02.pdf
http://www.tenable.com/security/research/tra-2021-24
http://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdf

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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.