Vulnerability identifier: #VU21520

Vulnerability risk: Medium

CVSSv3.1: 5.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2018-7759

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
BMXNOR0200H Ethernet / Serial RTU module
Hardware solutions / Firmware
Modicon Quantum
Hardware solutions / Firmware
Modicon Premium
Hardware solutions / Firmware
Modicon M340
Hardware solutions / Firmware

Vendor: Schneider Electric

Description

The vulnerability allows a remote attacker to cause a denial of service (DoS) condition on the target system.

The vulnerability exists due to the length of the source string specified (instead of the buffer size) as the number of bytes to be copied. A remote attacker can trigger memory corruption and cause a denial of service condition.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

BMXNOR0200H Ethernet / Serial RTU module: All versions

Modicon Quantum: All versions

Modicon Premium: All versions

Modicon M340: All versions

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External links
http://www.schneider-electric.com/en/download/document/SEVD-2018-081-02/

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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.