#VU21508 Buffer overflow in Schneider Electric products - CVE-2018-7851
Published: October 3, 2019
Vulnerability identifier: #VU21508
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2018-7851
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
BMxCRA312xx
140CRA312xxx
Modicon Premium
Modicon M340
Modicon M580
BMxCRA312xx
140CRA312xxx
Modicon Premium
Modicon M340
Modicon M580
Software vendor:
Schneider Electric
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 a boundary error when sending a specially crafted Modbus packet. A remote authenticated attacker can trigger memory corruption and cause a denial of service condition to the device that would force a restart to restore availability.
Remediation
Install updates from vendor's website.
Note: BMXCRA31210C, BMXCRA31210 and BMXCRA31200 update to firmware V2.40.