#VU55442 Out-of-bounds read in CodeMeter Runtime - CVE-2021-20093

Vulnerability identifier: #VU55442

Vulnerability risk: High

CVSSv4.0: 6.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-20093

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

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

Vendor: Wibu Systems

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service (DoS) attack.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

CodeMeter Runtime: before 7.21a

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External links
https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdf
https://www.tenable.com/security/research/tra-2021-24
https://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.