#VU21514 Buffer overflow in Modicon BMENOC0301 and Modicon M580 - CVE-2018-7838
Published: October 3, 2019
Vulnerability identifier: #VU21514
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2018-7838
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Modicon BMENOC0301
Modicon M580
Modicon BMENOC0301
Modicon M580
Software vendor:
Schneider Electric
Schneider Electric
Description
The vulnerability allows a remote attacker to cause a denial of service (DoS) on the target system.
The vulnerability exists due to a boundary error on the FTP service of the controller or the Ethernet BMENOC module when it receives a FTP CWD command with a data length greater than 1020 bytes. A power cycle is then needed to reactivate the FTP service. A remote attacker can trigger memory corruption and cause a denial of service.
Remediation
Install updates from vendor's website.