Vulnerability identifier: #VU10367

Vulnerability risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-5440

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
CODESYS
Server applications / Web servers

Vendor: CODESYS

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

The weakness exists due to stack-based buffer overflow. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Update to version 1.1.9.19.

Vulnerable software versions

CODESYS: All versions

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External links
http://customers.codesys.com/fileadmin/data/customers/security/2018/Advisory2018-01_LCDS-282.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.